Move APIs into libgs dirHEADmaster

38 files changed, 1362 insertions, 366 deletions

diff --git a/Makefile b/Makefile
index 781f0aa..435c451 100644
--- a/Makefile
+++ b/Makefile
@@ -1,34 +1,31 @@
 .POSIX:
-CC=c99
+
+CC=cc
 CFLAGS=-Wall -Wextra -Wno-unused-parameter
-E_CGLAGS=$$(pkg-config --cflags gtk+-3.0 jansson libcurl) $(CFLAGS)
+E_CGLAGS=$$(pkg-config --cflags gtk+-3.0 jansson libcurl) \
+		 -Ilibgs/src $(CFLAGS)
 LDFLAGS=
-E_LDFLAGS=$$(pkg-config --libs gtk+-3.0 jansson libcurl) $(LDFLAGS)
+E_LDFLAGS=$$(pkg-config --libs gtk+-3.0 jansson libcurl) \
+		  -Llibgs -lgs $(LDFLAGS)
 DESTDIR=
 PREFIX=/usr/local
 BINDIR=$(PREFIX)/bin
 
 OBJECTS=src/main.o \
-	src/string-util.o \
-	src/instance_info.o \
-	src/http.o \
-	src/status.o \
-	src/account.o \
-	src/timeline.o \
-	src/auth.o \
-	src/register.o \
 	src/login_window.o \
 	src/main_window.o \
 	src/config.o \
-	src/log.o
+	src/log.o \
 
 all: ap_client
 
 ap_client: $(OBJECTS)
-	$(CC) $(E_LDFLAGS) -o ap_client $(OBJECTS)
+	@echo $(CC) $(E_LDFLAGS) -o $@ $(OBJECTS)
+	@$(CC) $(E_LDFLAGS) -o $@ $(OBJECTS)
 
 .c.o:
-	$(CC) $(E_CGLAGS) -c -o $@ $<
+	@echo $(CC) $(E_CGLAGS) -c -o $@ $<
+	@$(CC) $(E_CGLAGS) -c -o $@ $<
 
 install: ap_client
 	mkdir -p $(DESTDIR)$(BINDIR)
@@ -42,23 +39,17 @@ clean:
 uninstall:
 	rm -f $(DESTDIR)$(BINDIR)/ap_client
 
-src/account.o: src/account.c src/account.h src/log.h
-src/auth.o: src/auth.c src/string-util.h src/auth.h src/http.h \
-	src/config.h src/log.h
-src/config.o: src/config.c src/string-util.h src/config.h src/log.h
-src/http.o: src/http.c src/string-util.h src/auth.h src/config.h \
- 	src/log.h
-src/instance_info.o: src/instance_info.c src/instance_info.h src/log.h
+src/config.o: src/config.c src/config.h src/log.h
+src/log.o: src/log.c src/log.h
+src/login_window.o: src/login_window.c src/main_window.h src/log.h
+src/main.o: src/main.c src/config.h src/main_window.h
+src/config.o: src/config.c src/config.h src/log.h
+src/log.o: src/log.c src/log.h
+src/login_window.o: src/login_window.c src/main_window.h src/log.h
+src/main.o: src/main.c src/config.h src/main_window.h
+src/config.o: src/config.c src/config.h src/log.h
 src/log.o: src/log.c src/log.h
-src/login_window.o: src/login_window.c src/auth.h src/register.h \
-	src/http.h src/timeline.h src/status.h src/account.h src/main_window.h \
-	src/log.h
-src/main.o: src/main.c src/http.h src/config.h src/main_window.h
-src/main_window.o: src/main_window.c src/auth.h src/http.h src/timeline.h \
-	src/status.h src/account.h src/log.h src/config.h src/login_window.h \
-	src/string-util.h
-src/register.o: src/register.c src/http.h src/config.h src/log.h
-src/status.o: src/status.c src/status.h src/account.h src/log.h
-src/string-util.o: src/string-util.c
-src/timeline.o: src/timeline.c src/timeline.h src/status.h src/account.h \
-	src/auth.h src/config.h src/http.h src/string-util.h src/log.h
+src/login_window.o: src/login_window.c src/main_window.h src/log.h
+src/main.o: src/main.c src/config.h src/main_window.h
+src/main_window.o: src/main_window.c src/log.h src/config.h \
+	src/login_window.h
diff --git a/libgs/LICENSE b/libgs/LICENSE
new file mode 100644
index 0000000..53d1f3d
--- /dev/null
+++ b/libgs/LICENSE
@@ -0,0 +1,675 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
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+party means to make such an agreement or commitment not to enforce a
+patent against the party.
+
+  If you convey a covered work, knowingly relying on a patent license,
+and the Corresponding Source of the work is not available for anyone
+to copy, free of charge and under the terms of this License, through a
+publicly available network server or other readily accessible means,
+then you must either (1) cause the Corresponding Source to be so
+available, or (2) arrange to deprive yourself of the benefit of the
+patent license for this particular work, or (3) arrange, in a manner
+consistent with the requirements of this License, to extend the patent
+license to downstream recipients.  "Knowingly relying" means you have
+actual knowledge that, but for the patent license, your conveying the
+covered work in a country, or your recipient's use of the covered work
+in a country, would infringe one or more identifiable patents in that
+country that you have reason to believe are valid.
+
+  If, pursuant to or in connection with a single transaction or
+arrangement, you convey, or propagate by procuring conveyance of, a
+covered work, and grant a patent license to some of the parties
+receiving the covered work authorizing them to use, propagate, modify
+or convey a specific copy of the covered work, then the patent license
+you grant is automatically extended to all recipients of the covered
+work and works based on it.
+
+  A patent license is "discriminatory" if it does not include within
+the scope of its coverage, prohibits the exercise of, or is
+conditioned on the non-exercise of one or more of the rights that are
+specifically granted under this License.  You may not convey a covered
+work if you are a party to an arrangement with a third party that is
+in the business of distributing software, under which you make payment
+to the third party based on the extent of your activity of conveying
+the work, and under which the third party grants, to any of the
+parties who would receive the covered work from you, a discriminatory
+patent license (a) in connection with copies of the covered work
+conveyed by you (or copies made from those copies), or (b) primarily
+for and in connection with specific products or compilations that
+contain the covered work, unless you entered into that arrangement,
+or that patent license was granted, prior to 28 March 2007.
+
+  Nothing in this License shall be construed as excluding or limiting
+any implied license or other defenses to infringement that may
+otherwise be available to you under applicable patent law.
+
+  12. No Surrender of Others' Freedom.
+
+  If conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot convey a
+covered work so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you may
+not convey it at all.  For example, if you agree to terms that obligate you
+to collect a royalty for further conveying from those to whom you convey
+the Program, the only way you could satisfy both those terms and this
+License would be to refrain entirely from conveying the Program.
+
+  13. Use with the GNU Affero General Public License.
+
+  Notwithstanding any other provision of this License, you have
+permission to link or combine any covered work with a work licensed
+under version 3 of the GNU Affero General Public License into a single
+combined work, and to convey the resulting work.  The terms of this
+License will continue to apply to the part which is the covered work,
+but the special requirements of the GNU Affero General Public License,
+section 13, concerning interaction through a network will apply to the
+combination as such.
+
+  14. Revised Versions of this License.
+
+  The Free Software Foundation may publish revised and/or new versions of
+the GNU General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+  Each version is given a distinguishing version number.  If the
+Program specifies that a certain numbered version of the GNU General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation.  If the Program does not specify a version number of the
+GNU General Public License, you may choose any version ever published
+by the Free Software Foundation.
+
+  If the Program specifies that a proxy can decide which future
+versions of the GNU General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+  Later license versions may give you additional or different
+permissions.  However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<https://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.
+
diff --git a/libgs/Makefile b/libgs/Makefile
new file mode 100644
index 0000000..8714519
--- /dev/null
+++ b/libgs/Makefile
@@ -0,0 +1,48 @@
+.POSIX:
+CC=cc
+CFLAGS=-pedantic -o2 -pipe -Wall -Wextra -Wno-unused-parameter -fPIC -shared
+LDFLAGS=-lcurl -ljansson
+TARGET=libgs.so
+
+OBJECTS=src/gs.o \
+	src/app.o \
+	src/account.o \
+	src/auth.o \
+	src/client.o \
+	src/http.o \
+	src/log.o \
+	src/timeline.o \
+	src/status.o \
+	src/string-util.o
+
+all: $(TARGET)
+
+$(TARGET): $(OBJECTS)
+	$(CC) $(CFLAGS) -o $@ $(OBJECTS) $(LDFLAGS)
+
+.c.o:
+	$(CC) $(CFLAGS) -c -o $@ $<
+
+clean: 
+	rm -f src/*.o
+	rm -f $(TARGET)
+
+src/account.o: src/account.c src/account.h src/log.h
+src/app.o: src/app.c src/app.h src/http.h src/log.h
+src/auth.o: src/auth.c src/auth.h src/client.h src/log.h \
+	src/string-util.h
+src/client.o: src/client.c src/client.h src/http.h src/log.h \
+ src/string-util.h
+src/config.o: src/config.c src/string-util.h src/config.h src/log.h
+src/gs.o: src/gs.c src/gs.h src/app.h src/account.h src/auth.h \
+	src/client.h src/http.h src/log.h src/string-util.h src/status.h \
+	src/timeline.h
+src/http.o: src/http.c src/string-util.h src/auth.h src/client.h \
+	src/log.h
+src/instance_info.o: src/instance_info.c src/instance_info.h src/log.h
+src/log.o: src/log.c src/log.h
+src/status.o: src/status.c src/status.h src/account.h src/log.h
+src/string-util.o: src/string-util.c
+src/timeline.o: src/timeline.c src/timeline.h src/status.h src/account.h \
+	src/client.h src/auth.h src/config.h src/http.h src/string-util.h \
+	src/log.h
diff --git a/src/account.c b/libgs/src/account.c
index c407d56..ecf3c28 100644
--- a/src/account.c
+++ b/libgs/src/account.c
@@ -5,40 +5,41 @@
 #include "account.h"
 #include "log.h"
 
-struct account *account_from_json(const char *json_data)
+struct gs_account *gs_account_from_json(const char *json_data)
 {
-    struct account *a;
+    struct gs_account *a;
     json_t *root;
     json_error_t error;
 
     root = json_loads(json_data, 0, &error);
     if (!root) {
-        log_msg(LOG_WARNING, "account_from_json", "json parse error: line %d: %s",
-                error.line, error.text);
+        gs_log(GS_WARNING, "gs_account_from_json", 
+                "json parse error: line %d: %s", error.line, error.text);
         return NULL;
     }
 
-    a = account_from_json_t(root);
+    a = gs_account_from_json_t(root);
     json_decref(root);
     return a;
 }
 
-struct account *account_from_json_t(const json_t *root)
+struct gs_account *gs_account_from_json_t(const json_t *root)
 {
-    struct account *a;
+    struct gs_account *a;
     if (!root) {
-        log_msg(LOG_WARNING, "account_from_json_t", "json data is null");
+        gs_log(GS_WARNING, "gs_account_from_json_t", "json data is null");
         return NULL;
     }
 
     if (!json_is_object(root)) {
-        log_msg(LOG_WARNING, "account_from_json_t", "json root is not object");
+        gs_log(GS_WARNING, "gs_account_from_json_t", 
+                "json root is not object");
         return NULL;
     }
 
-    a = calloc(1, sizeof(struct account));
+    a = calloc(1, sizeof(struct gs_account));
     if (!a) {
-        err(1, "account_from_json_t");
+        err(1, "gs_account_from_json_t");
         return NULL;
     }
 
@@ -65,7 +66,7 @@ struct account *account_from_json_t(const json_t *root)
     return a;
 }
 
-void account_free(struct account *a)
+void gs_account_free(struct gs_account *a)
 {
     if (a->id)
         free(a->id);
diff --git a/src/account.h b/libgs/src/account.h
index 547f276..c9d36d2 100644
--- a/src/account.h
+++ b/libgs/src/account.h
@@ -1,9 +1,10 @@
-#ifndef __account_H
-#define __account_H
+#ifndef __GS_ACCOUNT_H
+#define __GS_ACCOUNT_H
 
 #include <stdbool.h>
+#include <jansson.h>
 
-struct account {
+struct gs_account {
     char *id;
     char *username;
     char *acct;
@@ -18,12 +19,12 @@ struct account {
     char *avatar_static;
     char *header;
     char *header_static;
-    struct account *moved;
+    struct gs_account *moved;
     bool bot;
 };
 
-struct account *account_from_json(const char *json_data);
-struct account *account_from_json_t(const json_t *);
-void account_free(struct account *);
+struct gs_account *gs_account_from_json(const char *json_data);
+struct gs_account *gs_account_from_json_t(const json_t *);
+void gs_account_free(struct gs_account *);
 
 #endif
diff --git a/src/register.c b/libgs/src/app.c
index 4885ec5..b3f6e20 100644
--- a/src/register.c
+++ b/libgs/src/app.c
@@ -1,20 +1,14 @@
 #define _POSIX_C_SOURCE 200809L
 #include <err.h>
-#include <string.h>
-#include <stdbool.h>
 #include <jansson.h>
+#include <string.h>
+#include "app.h"
 #include "http.h"
-#include "config.h"
 #include "log.h"
 
 #define CLIENT_NAME "ap_client"
 #define REGISTER_URL "https://%s/api/v1/apps"
 
-struct register_response {
-    char *client_id;
-    char *client_secret;
-};
-
 static char *get_register_url(const char *domain)
 {
     char *url;
@@ -49,9 +43,9 @@ static char *get_register_req()
     return req;
 }
 
-static struct register_response *get_register_resp(const char *data)
+static struct gs_app *get_register_resp(const char *data)
 {
-    struct register_response *resp;
+    struct gs_app *resp;
     json_t *json_root;
     json_t *cid, *csec;
 
@@ -72,7 +66,7 @@ static struct register_response *get_register_resp(const char *data)
         return NULL;
     }
 
-    resp = calloc(1, sizeof(struct register_response));
+    resp = calloc(1, sizeof(struct gs_app));
     resp->client_id = strdup(json_string_value(cid));
     resp->client_secret = strdup(json_string_value(csec));
 
@@ -80,49 +74,42 @@ static struct register_response *get_register_resp(const char *data)
     return resp;
 }
 
-int register_app(const char *domain)
+struct gs_app *gs_app_register(const char *domain)
 {
     char *url, *req_data, *resp_data;
-    struct register_response *resp;
+    struct gs_app *resp;
 
     if (!domain || !*domain) {
-        log_msg(LOG_WARNING, "register_app", "invalid argument");
-        return -1;
+        gs_log(GS_WARNING, "gs_app_register", "invalid argument");
+        return NULL;
     }
 
     url = get_register_url(domain);
     if (!url) {
-        return -1;
+        gs_log(GS_WARNING, "gs_app_register", "invalid argument");
+        return NULL;
     }
 
     req_data = get_register_req();
     if (!req_data) {
         free(url);
-        return -1;
+        return NULL;
     }
 
-    resp_data = post_request(url, req_data);
+    resp_data = gs_http_post(url, NULL, req_data);
     free(url);
     free(req_data);
     if (!resp_data) {
-        log_msg(LOG_WARNING, "register_app", "register request failed");
-        return -1;
+        gs_log(GS_WARNING, "gs_app_register", "register request failed");
+        return NULL;
     }
 
     resp = get_register_resp(resp_data);
     free(resp_data);
     if (!resp) {
-        log_msg(LOG_WARNING, "register_app", "invalid response");
-        return -1;
+        gs_log(GS_WARNING, "gs_app_register", "invalid response");
+        return NULL;
     }
 
-    config_set_client_id(resp->client_id);
-    config_set_client_secret(resp->client_secret);
-    config_set_instance_url(domain);
-
-    free(resp->client_id);
-    free(resp->client_secret);
-    free(resp);
-
-    return 0;
+    return resp;
 }
diff --git a/libgs/src/app.h b/libgs/src/app.h
new file mode 100644
index 0000000..f7b6e8a
--- /dev/null
+++ b/libgs/src/app.h
@@ -0,0 +1,13 @@
+#ifndef __GS_APP_H
+#define __GS_APP_H
+
+struct gs_app {
+    char *client_id;
+    char *client_secret;
+};
+
+struct gs_app *gs_app_register(const char *domain);
+
+#endif
+
+
diff --git a/src/auth.c b/libgs/src/auth.c
index c903e67..88ab7b7 100644
--- a/src/auth.c
+++ b/libgs/src/auth.c
@@ -1,47 +1,27 @@
 #define _POSIX_C_SOURCE 200809L
 #include <err.h>
 #include <string.h>
-#include <pthread.h>
-#include <stdbool.h>
 #include <jansson.h>
-#include "string-util.h"
 #include "auth.h"
-#include "http.h"
-#include "config.h"
+#include "client.h"
 #include "log.h"
-
-#define LOGIN_URL "https://%s/oauth/token"
+#include "string-util.h"
 
 struct login_response {
     char *access_token;
     char *scope;
 };
 
-static char *get_login_url(const char *domain)
-{
-    char *url;
-    size_t size;
-
-    size = strlen(LOGIN_URL) + strlen(domain) - 1;
-    url = malloc(size);
-    if (!url) {
-        err(1, NULL);
-        return NULL;
-    }
-
-    sprintf(url, LOGIN_URL, domain);
-    return url;
-}
-
-static char *get_login_req(const char *email, const char *password)
+static char *get_login_req(const char *client_id, const char *client_secret,
+        const char *email, const char *password)
 {
     char *req;
     json_t *json_root;
     json_error_t error;
 
     json_root = json_pack_ex(&error, 1, "{s:s, s:s, s:s, s:s, s:s}",
-            "client_id", config->client_id, "client_secret",
-            config->client_secret, "grant_type", "password", "username", email,
+            "client_id", client_id, "client_secret",
+            client_secret, "grant_type", "password", "username", email,
             "password", password);
     if (!json_root) {
         return NULL;
@@ -84,59 +64,37 @@ static struct login_response *get_login_resp(char *data)
     return resp;
 }
 
-int login(const char *email, const char *password)
+int gs_auth_authenticate(GSClient *c, const char *email, const char *password)
 {
-    char *url, *req_data, *resp_data;
+    char *req_data, *resp_data;
     struct login_response *resp;
 
     if (!email || !*email || !password || !*password) {
-        log_msg(LOG_WARNING, "login", "invalid argument");
-        return -1;
-    }
-
-    if (!is_registered()) {
-        log_msg(LOG_WARNING, "login", "app not registred");
+        gs_log(GS_WARNING, "gs_auth_authenticate", "invalid argument");
         return -1;
     }
 
-    url = get_login_url(config->instance_url);
-    if (!url) {
-        err(1, NULL);
-        return -1;
-    }
-
-    req_data = get_login_req(email, password);
+    req_data = get_login_req(c->client_id, c->client_secret, email, password);
     if (!req_data) {
-        free(url);
+        gs_log(GS_WARNING, "gs_auth_authenticate", "invalid argument");
         return -1;
     }
 
-    resp_data = post_request(url, req_data);
-    free(url);
+    resp_data = (char *)gs_client_do_api(c, 2, "/oauth/token", req_data);
     free(req_data);
     if (!resp_data) {
-        log_msg(LOG_WARNING, "register_app", "login request failed");
-        return -1;
-    }
-
-    if (!resp_data) {
-        log_msg(LOG_WARNING, "register_app", "invalid response");
+        gs_log(GS_WARNING, "gs_auth_authenticate", "invalid response");
         return -1;
     }
 
     resp = get_login_resp(resp_data);
     free(resp_data);
     if (!resp) {
-        log_msg(LOG_WARNING, "register_app", "invalid response");
+        gs_log(GS_WARNING, "gs_auth_authenticate", "invalid response");
         return -1;
     }
 
-    config_set_access_token(resp->access_token);
-    /* scope = strdup(json_string_value(scope_j)); */
-
-    if (config_save()) {
-        log_msg(LOG_WARNING, "login_call", "failed to save config");
-    }
+    gs_client_set_token(c, resp->access_token);
 
     free(resp->access_token);
     free(resp->scope);
@@ -144,3 +102,8 @@ int login(const char *email, const char *password)
 
     return 0;
 }
+
+bool gs_auth_is_logged_in(GSClient *c)
+{
+    return c->access_token != NULL;
+}
diff --git a/libgs/src/auth.h b/libgs/src/auth.h
new file mode 100644
index 0000000..431e0d7
--- /dev/null
+++ b/libgs/src/auth.h
@@ -0,0 +1,12 @@
+#ifndef __GS_AUTH_H
+#define __GS_AUTH_H
+
+#include <stdbool.h>
+#include "client.h"
+
+int gs_auth_authenticate(GSClient *c, const char *email, const char *password);
+bool gs_auth_is_logged_in(GSClient *c);
+
+
+#endif
+
diff --git a/libgs/src/client.c b/libgs/src/client.c
new file mode 100644
index 0000000..7c0b62c
--- /dev/null
+++ b/libgs/src/client.c
@@ -0,0 +1,72 @@
+#define _POSIX_C_SOURCE 200809L
+
+#include <err.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include "client.h"
+#include "http.h"
+#include "log.h"
+#include "string-util.h"
+
+GSClient *gs_client_new(const char *server, const char *client_id, 
+        const char *client_secret)
+{
+    GSClient *c;
+
+    c = calloc(1, sizeof(GSClient));
+    if (!c) {
+        err(1, "gs_new_client");
+        return NULL;
+    }
+
+    c->server = strdup(server);
+    c->client_id = strdup(client_id);
+    c->client_secret = strdup(client_secret);
+
+    return c;
+}
+
+void *gs_client_do_api(GSClient *c, int method, const char *url, 
+        const char *req)
+{
+    char *resp;
+
+    size_t s = strlen(c->server) + strlen(url) + 1;
+    char full_url[s];
+    strlcpy(full_url, c->server, s);
+    strlcat(full_url, url, s);
+
+    switch (method) {
+        case 1:
+            resp = gs_http_get(full_url, c->access_token);
+            break;
+        case 2:
+            resp = gs_http_post(full_url, c->access_token, req);
+            break;
+        default:
+            gs_log(GS_WARNING, "gs_client_do_api", "invalid api method");
+            return NULL;
+    }
+
+    return resp;
+}
+
+void gs_client_set_token(GSClient *c, const char *access_token)
+{
+    c->access_token = strdup(access_token);
+}
+
+void gs_client_free(GSClient *c)
+{
+    if (!c) 
+        return;
+    if (c->server)
+        free(c->server);
+    if (c->client_id)
+        free(c->client_id);
+    if (c->client_secret)
+        free(c->client_secret);
+    if (c->access_token)
+        free(c->access_token);
+}
diff --git a/libgs/src/client.h b/libgs/src/client.h
new file mode 100644
index 0000000..d24b1ff
--- /dev/null
+++ b/libgs/src/client.h
@@ -0,0 +1,29 @@
+#ifndef __GS_CLIENT_H
+#define __GS_CLIENT_H
+
+typedef struct {
+    char *server;
+    char *client_id;
+    char *client_secret;
+    char *access_token;
+} GSClient;
+
+/*
+ * Create new GSClient with server url, client_id and client_secret returned
+ * from gs_register call.
+ * It will add `http://` prefix to server if it doesn't exists.
+ */
+GSClient *gs_client_new(const char *server, const char *client_id, 
+        const char *client_secret);
+
+/* Generic helper fuction to make http calls */
+void *gs_client_do_api(GSClient *c, int method, const char *url, 
+        const char *req);
+
+/* Set user access_token */
+void gs_client_set_token(GSClient *c, const char *access_token);
+
+/* Free GSClient */
+void gs_client_free(GSClient *c);
+
+#endif
diff --git a/libgs/src/config.c b/libgs/src/config.c
new file mode 100644
index 0000000..167c9af
--- /dev/null
+++ b/libgs/src/config.c
@@ -0,0 +1,174 @@
+#define _POSIX_C_SOURCE 200809L
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <err.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <limits.h>
+#include <libgen.h>
+#include <jansson.h>
+#include "string-util.h"
+#include "config.h"
+#include "log.h"
+
+#define CONFIG_PATH_SUFFIX "/.config/ap_client/config"
+
+struct config _config;
+const struct config *config = (const struct config *)&_config;
+
+bool is_logged_in()
+{
+    if (!(config->access_token) || !*(config->access_token) ||
+            !(config->instance_url) || !*(config->instance_url)) {
+        return false;
+    }
+    return true;
+}
+
+const char *get_access_token()
+{
+    return (const char *)config->access_token;
+}
+
+const char *get_instance_url()
+{
+    return (const char *)config->instance_url;
+}
+
+bool is_registered()
+{
+    if (!(_config.client_id) || !*(_config.client_id) ||
+            !(_config.client_secret) || !*(_config.client_secret) ||
+            !(_config.instance_url) || !*(_config.instance_url)) {
+        return false;
+    }
+    return true;
+}
+
+char *get_config_path()
+{
+    char *home = getenv("HOME");
+    if (!home || !*home) {
+        return NULL;
+    }
+    char config_path[PATH_MAX];
+    strlcpy(config_path, home, sizeof(config_path));
+    strlcat(config_path, CONFIG_PATH_SUFFIX, sizeof(config_path));
+    return strdup(config_path);
+}
+
+void config_load()
+{
+    json_t *root;
+    json_error_t error;
+
+    char *path = get_config_path();
+    root = json_load_file(path, 0, &error);
+    if (!root) {
+        gs_log(GS_WARNING, "config_load", "json parse error: line %d: %s",
+                error.line, error.text);
+        free(path);
+        return;
+    }
+    free(path);
+
+    if (!json_is_object(root)) {
+        gs_log(GS_WARNING, "config_load", "json root is not object");
+        json_decref(root);
+        return;
+    }
+
+    json_t *instance_url = json_object_get(root, "instance_url");
+    if (json_is_string(instance_url)) {
+        _config.instance_url = strdup(json_string_value(instance_url));
+    }
+
+    json_t *client_id = json_object_get(root, "client_id");
+    if (json_is_string(client_id)) {
+        _config.client_id = strdup(json_string_value(client_id));
+    }
+
+    json_t *client_secret = json_object_get(root, "client_secret");
+    if (json_is_string(client_secret)) {
+        _config.client_secret = strdup(json_string_value(client_secret));
+    }
+
+    json_t *access_token = json_object_get(root, "access_token");
+    if (json_is_string(access_token)) {
+        _config.access_token = strdup(json_string_value(access_token));
+    }
+
+    json_decref(root);
+}
+
+int config_save()
+{
+    json_t *root;
+    json_error_t error;
+
+    root = json_pack_ex(&error, 1, "{s:s, s:s, s:s, s:s}", "instance_url",
+            _config.instance_url, "client_id", _config.client_id,
+            "client_secret", _config.client_secret, "access_token",
+            _config.access_token);
+
+    if (!root) {
+        gs_log(GS_WARNING, "register_app", "json pack error: line %d: %s",
+                error.line, error.text);
+        return -1;
+    }
+
+    char *config_path = get_config_path();
+    struct stat st;
+    char *dir = dirname(config_path);
+    if (stat(dir, &st)) {
+        if (mkdir(dir, S_IRWXU)) {
+            free(config_path);
+            gs_log(GS_WARNING, "config_save", "failed to create config dir");
+            return -1;
+        }
+    }
+    free(config_path);
+
+    if (json_dump_file(root, get_config_path(), 0)) {
+        gs_log(GS_WARNING, "config_save", "unable to save json");
+        json_decref(root);
+        return -1;
+    }
+
+    json_decref(root);
+    return 0;
+}
+
+void config_set_client_id(const char *cid)
+{
+    _config.client_id = strdup(cid);
+}
+
+void config_set_client_secret(const char *cs)
+{
+    _config.client_secret = strdup(cs);
+}
+
+void config_set_instance_url(const char *iu)
+{
+    _config.instance_url = strdup(iu);
+}
+
+void config_set_access_token(const char *a)
+{
+    _config.access_token = strdup(a);
+}
+
+void config_cleanup()
+{
+    if (_config.client_id)
+        free(_config.client_id);
+    if (_config.client_secret)
+        free(_config.client_secret);
+    if (_config.instance_url)
+        free(_config.instance_url);
+    if (_config.access_token)
+        free(_config.access_token);
+}
diff --git a/libgs/src/config.h b/libgs/src/config.h
new file mode 100644
index 0000000..dd1f38d
--- /dev/null
+++ b/libgs/src/config.h
@@ -0,0 +1,28 @@
+#ifndef __GS_CONFIG_H
+#define __GS_CONFIG_H
+
+#include <stdbool.h>
+
+struct gs_config {
+    char *instance_url;
+    char *client_id;
+    char *client_secret;
+    char *access_token;
+};
+
+extern const struct gs_config *config;
+
+bool gs_is_logged_in();
+const char* gs_get_access_token();
+const char* gs_get_instance_url();
+int gs_read_local_credentials();
+bool gs_is_registered();
+void gs_config_load();
+int gs_config_save();
+void gs_config_set_client_id(const char *cid);
+void gs_config_set_client_secret(const char *cs);
+void gs_config_set_instance_url(const char *iu);
+void gs_config_set_access_token(const char *a);
+void gs_config_cleanup();
+
+#endif
diff --git a/libgs/src/gs.c b/libgs/src/gs.c
new file mode 100644
index 0000000..587de59
--- /dev/null
+++ b/libgs/src/gs.c
@@ -0,0 +1,13 @@
+#define _POSIX_C_SOURCE 200809L
+#include "gs.h"
+#include "http.h"
+
+int gs_init()
+{
+    return gs_http_init();
+}
+
+void gs_cleanup()
+{
+    gs_http_cleanup();
+}
diff --git a/libgs/src/gs.h b/libgs/src/gs.h
new file mode 100644
index 0000000..c69ca40
--- /dev/null
+++ b/libgs/src/gs.h
@@ -0,0 +1,17 @@
+#ifndef __GS_H
+#define __GS_H
+
+#include "app.h" 
+#include "account.h" 
+#include "auth.h" 
+#include "client.h" 
+#include "http.h" 
+#include "log.h" 
+#include "string-util.h" 
+#include "status.h" 
+#include "timeline.h" 
+
+int gs_init();
+void gs_cleanup();
+
+#endif
diff --git a/src/http.c b/libgs/src/http.c
index ddd0470..e1224ff 100644
--- a/src/http.c
+++ b/libgs/src/http.c
@@ -6,22 +6,22 @@
 #include <curl/curl.h>
 #include "string-util.h"
 #include "auth.h"
-#include "config.h"
+#include "client.h"
 #include "log.h"
 
 #define BUFFER_SIZE (256 * 1024)
 #define AUTH_HEADER_STR_PREFIX "Authorization: Bearer "
 
-int http_init()
+int gs_http_init()
 {
     if (curl_global_init(CURL_GLOBAL_ALL)) {
-        log_msg(LOG_WARNING, "http_init", "failed to init curl");
+        gs_log(GS_WARNING, "http_init", "failed to init curl");
         return  -1;
     }
     return 0;
 }
 
-void http_cleanup()
+void gs_http_cleanup()
 {
     curl_global_cleanup();
     return;
@@ -37,7 +37,7 @@ static size_t write_response(void *ptr, size_t size, size_t nmemb, void *stream)
     struct write_result *result = (struct write_result *)stream;
 
     if (result->pos + size * nmemb >= BUFFER_SIZE - 1) {
-        log_msg(LOG_WARNING, "write_response", "buffer too small");
+        gs_log(GS_WARNING, "write_response", "buffer too small");
         return 0;
     }
 
@@ -47,7 +47,7 @@ static size_t write_response(void *ptr, size_t size, size_t nmemb, void *stream)
     return size * nmemb;
 }
 
-char *get_request(const char *url)
+char *gs_http_get(const char *url, const char *token)
 {
     CURL *curl = NULL;
     CURLcode status;
@@ -65,10 +65,9 @@ char *get_request(const char *url)
 
     struct write_result write_result = {.data = data, .pos = 0};
 
-    if (is_logged_in()) {
-        const char *token = get_access_token();
+    if (token) {
         size_t s = strlen(AUTH_HEADER_STR_PREFIX) + strlen(token) + 1;
-        char *auth_header_val = malloc(s);
+        char auth_header_val[s];
         strlcpy(auth_header_val, AUTH_HEADER_STR_PREFIX, s);
         strlcat(auth_header_val, token, s);
         headers = curl_slist_append(headers, auth_header_val);
@@ -81,7 +80,7 @@ char *get_request(const char *url)
 
     status = curl_easy_perform(curl);
     if (status) {
-        log_msg(LOG_WARNING, "get_request",
+        gs_log(GS_WARNING, "get_request",
                 "unable to request data from %s: %s", url,
                 curl_easy_strerror(status));
         goto error;
@@ -89,7 +88,7 @@ char *get_request(const char *url)
 
     curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &code);
     if (code != 200) {
-        log_msg(LOG_WARNING, "get_request", "server responded with code %ld",
+        gs_log(GS_WARNING, "get_request", "server responded with code %ld",
                 code);
         goto error;
     }
@@ -110,7 +109,7 @@ error:
     return NULL;
 }
 
-char *post_request(const char *url, char *post_data)
+char *gs_http_post(const char *url, const char *token, const char *post_data)
 {
     CURL *curl = NULL;
     CURLcode status;
@@ -128,10 +127,9 @@ char *post_request(const char *url, char *post_data)
 
     struct write_result write_result = {.data = data, .pos = 0};
 
-    if (is_logged_in()) {
-        const char *token = get_access_token();
+    if (token) {
         size_t s = strlen(AUTH_HEADER_STR_PREFIX) + strlen(token) + 1;
-        char *auth_header_val = malloc(s);
+        char auth_header_val[s];
         strlcpy(auth_header_val, AUTH_HEADER_STR_PREFIX, s);
         strlcat(auth_header_val, token, s);
         headers = curl_slist_append(headers, auth_header_val);
@@ -150,14 +148,16 @@ char *post_request(const char *url, char *post_data)
 
     status = curl_easy_perform(curl);
     if (status) {
-        log_msg(LOG_WARNING, "post_request", "unable to request data from %s: %s",
+        gs_log(GS_WARNING, "post_request", 
+                "unable to request data from %s: %s",
                 url, curl_easy_strerror(status));
         goto error;
     }
 
     curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &code);
     if (code != 200) {
-        log_msg(LOG_WARNING, "post_request", "server responded with code %ld", code);
+        gs_log(GS_WARNING, "post_request", "server responded with code %ld", 
+                code);
         goto error;
     }
 
diff --git a/libgs/src/http.h b/libgs/src/http.h
new file mode 100644
index 0000000..a0d850d
--- /dev/null
+++ b/libgs/src/http.h
@@ -0,0 +1,9 @@
+#ifndef __GS_HTTP_H
+#define __GS_HTTP_H
+
+int gs_http_init();
+void gs_http_cleanup();
+char *gs_http_get(const char *url, const char *token);
+char *gs_http_post(const char *url, const char *token, const char *data);
+
+#endif
diff --git a/src/instance_info.c b/libgs/src/instance_info.c
index 3c13ebd..40f07c6 100644
--- a/src/instance_info.c
+++ b/libgs/src/instance_info.c
@@ -15,20 +15,20 @@ struct instance_info *instance_info_from_json(char *json_data)
     root = json_loads(json_data, 0, &error);
 
     if (!root) {
-        log_msg(LOG_WARNING, "instance_info_from_json", "error: on line %d: %s",
+        gs_log(GS_WARNING, "instance_info_from_json", "error: on line %d: %s",
                 error.line, error.text);
         return NULL;
     }
 
     if (!json_is_object(root)) {
-        log_msg(LOG_WARNING, "instance_info_from_json", "root is not object");
+        gs_log(GS_WARNING, "instance_info_from_json", "root is not object");
         json_decref(root);
         return NULL;
     }
 
     json_t *title = json_object_get(root, "title");
     if (!json_is_string(title)) {
-        log_msg(LOG_WARNING, "instance_info_from_json", "title is not string");
+        gs_log(GS_WARNING, "instance_info_from_json", "title is not string");
         return NULL;
     }
     info->title = strdup(json_string_value(title));
diff --git a/src/instance_info.h b/libgs/src/instance_info.h
index 72a5bbb..cdb6e84 100644
--- a/src/instance_info.h
+++ b/libgs/src/instance_info.h
@@ -1,5 +1,5 @@
-#ifndef __INSTANCE_INFO_H
-#define __INSTANCE_INFO_H
+#ifndef __GS_INSTANCE_INFO_H
+#define __GS_INSTANCE_INFO_H
 
 #include <stdbool.h>
 
diff --git a/libgs/src/log.c b/libgs/src/log.c
new file mode 100644
index 0000000..dad6d66
--- /dev/null
+++ b/libgs/src/log.c
@@ -0,0 +1,30 @@
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include "log.h"
+
+static const char *log_levels[] = {
+	"info",
+	"warning",
+	"error",
+	"fatal",
+};
+
+void gs_log(enum gs_log_level level, const char *namespace, 
+        const char *format, ...) {
+	va_list args;
+	va_start(args, format);
+
+	fprintf(stderr, "%s: %s: ", log_levels[level], namespace);
+	vfprintf(stderr, format, args);
+	fprintf(stderr, "\n");
+
+	if (level == GS_ERROR) {
+		exit(EXIT_FAILURE);
+	} else if (level == GS_FATAL) {
+		abort();
+	}
+
+	va_end(args);
+}
+
diff --git a/libgs/src/log.h b/libgs/src/log.h
new file mode 100644
index 0000000..83e3784
--- /dev/null
+++ b/libgs/src/log.h
@@ -0,0 +1,13 @@
+#ifndef __GS_LOG_H
+#define __GS_LOG_H
+
+enum gs_log_level {
+	GS_INFO = 0,
+	GS_WARNING,
+	GS_ERROR,
+	GS_FATAL
+};
+
+void gs_log(enum gs_log_level level, const char *namespace, const char *format, ...);
+
+#endif
diff --git a/src/status.c b/libgs/src/status.c
index cfb3645..5bcdb74 100644
--- a/src/status.c
+++ b/libgs/src/status.c
@@ -6,40 +6,40 @@
 #include "account.h"
 #include "log.h"
 
-struct status *status_from_json(const char *json_data)
+struct gs_status *gs_status_from_json(const char *json_data)
 {
-    struct status *s;
+    struct gs_status *s;
     json_t *root;
     json_error_t error;
 
     root = json_loads(json_data, 0, &error);
     if (!root) {
-        log_msg(LOG_WARNING, "status_from_json", "json parse error: line %d: %s",
-                error.line, error.text);
+        gs_log(GS_WARNING, "status_from_json", 
+                "json parse error: line %d: %s", error.line, error.text);
         return NULL;
     }
 
-    s = status_from_json_t(root);
+    s = gs_status_from_json_t(root);
     json_decref(root);
     return s;
 }
 
-struct status *status_from_json_t(const json_t *root)
+struct gs_status *gs_status_from_json_t(const json_t *root)
 {
-    struct status *s;
+    struct gs_status *s;
     if (!root) {
-        log_msg(LOG_WARNING, "status_from_json_t", "json data is null");
+        gs_log(GS_WARNING, "gs_status_from_json_t", "json data is null");
         return NULL;
     }
 
     if (!json_is_object(root)) {
-        log_msg(LOG_WARNING, "status_from_json_t", "json root is not object");
+        gs_log(GS_WARNING, "gs_status_from_json_t", "json root is not object");
         return NULL;
     }
 
-    s = calloc(1, sizeof(struct status));
+    s = calloc(1, sizeof(struct gs_status));
     if (!s) {
-        err(1, "status_from_json_t");
+        err(1, "gs_status_from_json_t");
         return NULL;
     }
 
@@ -60,7 +60,7 @@ struct status *status_from_json_t(const json_t *root)
 
     json_t *account = json_object_get(root, "account");
     if (json_is_object(account)) {
-        s->account = account_from_json_t(account);
+        s->account = gs_account_from_json_t(account);
     }
 
     json_t *in_reply_to_id = json_object_get(root, "in_reply_to_id");
@@ -98,7 +98,7 @@ struct status *status_from_json_t(const json_t *root)
     return s;
 }
 
-void status_free(struct status *s)
+void gs_status_free(struct gs_status *s)
 {
     if (s->id)
         free(s->id);
@@ -107,13 +107,13 @@ void status_free(struct status *s)
     if (s->url)
         free(s->url);
     if (s->account)
-        account_free(s->account);
+        gs_account_free(s->account);
     if (s->in_reply_to_id)
         free(s->in_reply_to_id);
     if (s->in_reply_to_account_id)
         free(s->in_reply_to_account_id);
     if (s->reblog)
-        status_free(s->reblog);
+        gs_status_free(s->reblog);
     if (s->content)
         free(s->content);
     free(s);
diff --git a/src/status.h b/libgs/src/status.h
index a065f50..431a027 100644
--- a/src/status.h
+++ b/libgs/src/status.h
@@ -1,19 +1,19 @@
-#ifndef __STATUS_H
-#define __STATUS_H
+#ifndef __GS_STATUS_H
+#define __GS_STATUS_H
 
 #include <stdbool.h>
 #include <jansson.h>
 
 #include "account.h"
 
-struct status {
+struct gs_status {
     char *id;
     char *uri;
     char *url;
-    struct account *account;
+    struct gs_account *account;
     char *in_reply_to_id;
     char *in_reply_to_account_id;
-    struct status *reblog;
+    struct gs_status *reblog;
     char *content;
     unsigned int replies_count;
     unsigned int reblogs_count;
@@ -24,8 +24,8 @@ struct status {
     bool sensitive;
 };
 
-struct status *status_from_json(const char *);
-struct status *status_from_json_t(const json_t *);
-void status_free(struct status *);
+struct gs_status *gs_status_from_json(const char *);
+struct gs_status *gs_status_from_json_t(const json_t *);
+void gs_status_free(struct gs_status *);
 
 #endif
diff --git a/src/string-util.c b/libgs/src/string-util.c
index d5a702b..7f151ae 100644
--- a/src/string-util.c
+++ b/libgs/src/string-util.c
@@ -84,40 +84,3 @@ size_t strlcat(char *dst, const char *src, size_t siz)
 
     return (dlen + (s - src)); /* count does not include NUL */
 }
-
-char *str_replace(const char *str, const char *old, const char *new)
-{
-    const char *ins;
-    char *result, *tmp;
-    size_t len_old, len_new, len_front, len_result;
-    int count;
-
-    if (!str || !old || !new)
-        return NULL;
-    len_old = strlen(old);
-    if (len_old == 0)
-        return NULL;
-    len_new = strlen(new);
-
-    ins = str;
-    for (count = 0; (tmp = strstr(ins, old)); ++count) {
-        ins = tmp + len_old;
-    }
-
-    len_result = strlen(str) + (len_new - len_old) * count + 1;
-    tmp = result = malloc(len_result);
-    if (!result)
-        return NULL;
-
-    while (count--) {
-        ins = strstr(str, old);
-        len_front = ins - str;
-        tmp = strncpy(tmp, str, len_front) + len_front;
-        strlcpy(tmp, new, len_result);
-        tmp += len_new;
-        str += len_front + len_old;
-    }
-    strlcpy(tmp, str, len_result);
-    return result;
-}
-
diff --git a/src/string-util.h b/libgs/src/string-util.h
index 2625765..6acee6d 100644
--- a/src/string-util.h
+++ b/libgs/src/string-util.h
@@ -1,5 +1,5 @@
-#ifndef __STRING_UTIL_H
-#define __STRING_UTIL_H
+#ifndef __GS_STRING_UTIL_H
+#define __GS_STRING_UTIL_H
 
 #include <sys/types.h>
 
diff --git a/src/timeline.c b/libgs/src/timeline.c
index 4cd9fe0..fa0a2e8 100644
--- a/src/timeline.c
+++ b/libgs/src/timeline.c
@@ -10,43 +10,25 @@
 #include "string-util.h"
 #include "log.h"
 
-#define TIMELINE_URL "https://%s/api/v1/timelines/home"
-
-static char *get_timeline_url(const char *domain)
-{
-    char *url;
-    size_t size;
-
-    size = strlen(TIMELINE_URL) + strlen(domain) - 1;
-    url = malloc(size);
-    if (!url) {
-        err(1, NULL);
-        return NULL;
-    }
-
-    sprintf(url, TIMELINE_URL, domain);
-    return url;
-}
-
-struct timeline *timeline_from_json(const char *json_data)
+struct gs_timeline *gs_timeline_from_json(const char *json_data)
 {
-    struct timeline *t;
+    struct gs_timeline *t;
     json_t *root;
     json_error_t error;
 
     root = json_loads(json_data, 0, &error);
     if (!root) {
-        log_msg(LOG_WARNING, "timeline_from_json", "json root it null");
+        gs_log(GS_WARNING, "timeline_from_json", "json root it null");
         return NULL;
     }
 
     if (!json_is_array(root)) {
-        log_msg(LOG_WARNING, "timeline_from_json", "json root is not array");
+        gs_log(GS_WARNING, "timeline_from_json", "json root is not array");
         json_decref(root);
         return NULL;
     }
 
-    t = calloc(1, sizeof(struct timeline));
+    t = calloc(1, sizeof(struct gs_timeline));
     if (!t) {
         err(1, NULL);
         json_decref(root);
@@ -57,7 +39,7 @@ struct timeline *timeline_from_json(const char *json_data)
     t->statuses = calloc(t->size, sizeof(struct status *));
     if (!(t->statuses)) {
         err(1, NULL);
-        timeline_free(t);
+        gs_timeline_free(t);
         json_decref(root);
         return NULL;
     }
@@ -67,7 +49,7 @@ struct timeline *timeline_from_json(const char *json_data)
         data = json_array_get(root, i);
         if (!data)
             goto error;
-        t->statuses[i] = status_from_json_t(data);
+        t->statuses[i] = gs_status_from_json_t(data);
         if (!(t->statuses[i]))
             goto error;
     }
@@ -75,40 +57,33 @@ struct timeline *timeline_from_json(const char *json_data)
     return t;
 
 error:
-    timeline_free(t);
+    gs_timeline_free(t);
     json_decref(root);
     return NULL;
 }
 
-void timeline_free(struct timeline *t)
+void gs_timeline_free(struct gs_timeline *t)
 {
     for (size_t i = 0; i < t->size; i++) {
         if (t->statuses[i])
-            status_free(t->statuses[i]);
+            gs_status_free(t->statuses[i]);
     }
     free(t->statuses);
     free(t);
 }
 
-struct timeline *get_timeline(const char *max_id, const char *since_id, const char *min_id,
-        int limit)
+struct gs_timeline *gs_timeline_get(GSClient *c, const char *max_id, 
+        const char *since_id, const char *min_id, int limit)
 {
-    char *url, *resp;
-    struct timeline *t;
-
-    url = get_timeline_url(config->instance_url);
-    if (!url) {
-        err(1, "get_timeline");
-        return NULL;
-    }
+    char *resp;
+    struct gs_timeline *t;
 
-    resp = get_request(url);
-    free(url);
+    resp = (char *)gs_client_do_api(c, 1, "/api/v1/timelines/home", NULL);
     if (!resp) {
         return NULL;
     }
 
-    t = timeline_from_json(resp);
+    t = gs_timeline_from_json(resp);
     free(resp);
     if (!t) {
         return NULL;
diff --git a/libgs/src/timeline.h b/libgs/src/timeline.h
new file mode 100644
index 0000000..73f46bb
--- /dev/null
+++ b/libgs/src/timeline.h
@@ -0,0 +1,17 @@
+#ifndef __GS_TIMELINE_H
+#define __GS_TIMELINE_H
+
+#include "status.h"
+#include "client.h"
+
+struct gs_timeline {
+    struct gs_status **statuses;
+    size_t size;
+};
+
+struct gs_timeline *gs_timeline_get(GSClient *c, const char *max_id, 
+        const char *since_id, const char *min_id, int limit);
+struct gs_timeline *gs_timeline_from_json(const char *);
+void gs_timeline_free(struct gs_timeline *);
+
+#endif
diff --git a/src/auth.h b/src/auth.h
deleted file mode 100644
index 9c3ee03..0000000
--- a/src/auth.h
+++ /dev/null
@@ -1,9 +0,0 @@
-#ifndef __AUTH_H
-#define __AUTH_H
-
-#include <stdbool.h>
-
-int login(const char *email, const char *password);
-
-#endif
-
diff --git a/src/config.c b/src/config.c
index f409700..24e3b54 100644
--- a/src/config.c
+++ b/src/config.c
@@ -1,15 +1,15 @@
 #define _POSIX_C_SOURCE 200809L
+#include <libgen.h>
+#include <limits.h>
 #include <string.h>
-#include <stdlib.h>
 #include <stdio.h>
-#include <err.h>
+#include <stdlib.h>
 #include <sys/stat.h>
 #include <sys/types.h>
 #include <unistd.h>
-#include <limits.h>
-#include <libgen.h>
+#include <gs.h>
+#include <gtk-3.0/gtk/gtk.h>
 #include <jansson.h>
-#include "string-util.h"
 #include "config.h"
 #include "log.h"
 
@@ -54,8 +54,8 @@ char *get_config_path()
         return NULL;
     }
     char config_path[PATH_MAX];
-    strlcpy(config_path, home, sizeof(config_path));
-    strlcat(config_path, CONFIG_PATH_SUFFIX, sizeof(config_path));
+    g_strlcpy(config_path, home, sizeof(config_path));
+    g_strlcat(config_path, CONFIG_PATH_SUFFIX, sizeof(config_path));
     return strdup(config_path);
 }
 
diff --git a/src/http.h b/src/http.h
deleted file mode 100644
index 8e69b55..0000000
--- a/src/http.h
+++ /dev/null
@@ -1,10 +0,0 @@
-#ifndef __HTTP_H
-#define __HTTP_H
-
-int http_init();
-void http_cleanup();
-char *get_request(const char *url);
-char *post_request(const char *url, char *data);
-/* int http_post_async(char *url, char *post_data, void (*callback)(char *)); */
-
-#endif
diff --git a/src/log.c b/src/log.c
index f1cb7d5..6aff619 100644
--- a/src/log.c
+++ b/src/log.c
@@ -10,7 +10,8 @@ static const char *log_levels[] = {
 	"fatal",
 };
 
-void log_msg(enum log_level level, const char *namespace, const char *format, ...) {
+void log_msg(enum log_level level, const char *namespace, 
+        const char *format, ...) {
 	va_list args;
 	va_start(args, format);
 
diff --git a/src/log.h b/src/log.h
index ecd3428..f38be7a 100644
--- a/src/log.h
+++ b/src/log.h
@@ -8,6 +8,7 @@ enum log_level {
 	LOG_FATAL
 };
 
-void log_msg(enum log_level level, const char *namespace, const char *format, ...);
+void log_msg(enum log_level level, const char *namespace, 
+        const char *format, ...);
 
 #endif
diff --git a/src/login_window.c b/src/login_window.c
index 241ca9b..54f7174 100644
--- a/src/login_window.c
+++ b/src/login_window.c
@@ -1,16 +1,13 @@
 #define _POSIX_C_SOURCE 200809L
-#include <err.h>
+#include <stdbool.h>
 #include <stdio.h>
 #include <stdlib.h>
-#include <stdbool.h>
 #include <gtk-3.0/gtk/gtk.h>
-#include "auth.h"
-#include "register.h"
-#include "http.h"
-#include "timeline.h"
+#include <gs.h>
 #include "main_window.h"
 #include "log.h"
 
+static GSClient *gs_client = NULL;
 GtkApplication *application;
 GObject *login_dialog;
 GObject *instance_domain_entry, *email_entry, *password_entry;
@@ -19,39 +16,40 @@ GObject *spinner;
 
 static gboolean login_completed(gpointer data)
 {
-    int *val_ptr = data;
     gtk_spinner_stop(GTK_SPINNER(spinner));
-    if (*val_ptr) {
-        free(val_ptr);
-        log_msg(LOG_WARNING, "login_callback", "login failed");
-        return G_SOURCE_REMOVE;
-    } else {
-        free(val_ptr);
-        gtk_widget_destroy(GTK_WIDGET(login_dialog));
-        return G_SOURCE_REMOVE;
-    }
+    gtk_widget_destroy(GTK_WIDGET(login_dialog));
+    return G_SOURCE_REMOVE;
+}
+
+static gboolean login_failed(gpointer data)
+{
+    gtk_spinner_stop(GTK_SPINNER(spinner));
+    return G_SOURCE_REMOVE;
 }
 
 static gpointer user_register(gpointer data)
 {
-    int *val_ptr;
     const char *instance_name, *email, *password;
+    struct gs_app *app;
 
     instance_name = gtk_entry_get_text(GTK_ENTRY(instance_domain_entry));
     email = gtk_entry_get_text(GTK_ENTRY(email_entry));
     password = gtk_entry_get_text(GTK_ENTRY(password_entry));
 
-    val_ptr = malloc(sizeof(int));
-    *val_ptr = register_app(instance_name);
+    app = gs_app_register(instance_name);
     if (*val_ptr) {
         log_msg(LOG_WARNING, "user_register", "registration failed");
     }
-    *val_ptr = login(email, password);
-    if (*val_ptr) {
+
+    gs_client = gs_client_new(instance_name, app->client_id, app->client_secret);
+
+    if (gs_auth_authenticate(gs_client, email, password)) {
         log_msg(LOG_WARNING, "user_register", "login failed");
+        gdk_threads_add_idle(login_failed, NULL);
+        return;
     }
 
-    gdk_threads_add_idle(login_completed, val_ptr);
+    gdk_threads_add_idle(login_completed, NULL);
     return NULL;
 }
 
@@ -73,7 +71,6 @@ static bool is_form_valid()
 
 static void login_button_click(GtkButton *button, gpointer user_data)
 {
-    g_print("clicked\n");
     if (is_form_valid())
         submit_login_form();
 }
@@ -92,14 +89,15 @@ static void login_form_changed(GtkWidget *widget, gpointer data)
         gtk_widget_set_sensitive(GTK_WIDGET(login_button), false);
 }
 
-int create_login_dialog()
+int create_login_dialog(gpointer data)
 {
     GtkBuilder *login_builder;
 
     login_builder = gtk_builder_new_from_file("data/login_window.ui");
     login_dialog = gtk_builder_get_object(login_builder, "login_dialog");
 
-    instance_domain_entry = gtk_builder_get_object(login_builder, "instance_name");
+    instance_domain_entry = gtk_builder_get_object(login_builder, 
+            "instance_name");
     g_signal_connect(G_OBJECT(instance_domain_entry), "changed",
             G_CALLBACK(login_form_changed), NULL);
     g_signal_connect(GTK_ENTRY(instance_domain_entry), "activate",
diff --git a/src/login_window.h b/src/login_window.h
index b3d299d..9243e46 100644
--- a/src/login_window.h
+++ b/src/login_window.h
@@ -1,7 +1,9 @@
 #ifndef __LOGIN_WINDOW_H
 #define __LOGIN_WINDOW_H
 
-int create_login_dialog();
+#include <gtk-3.0/gtk/gtk.h>
+
+int create_login_dialog(gpointer data);
 
 #endif
 
diff --git a/src/main.c b/src/main.c
index 78968a3..9d8747e 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1,24 +1,26 @@
 #define _POSIX_C_SOURCE 200809L
-#include <err.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <stdbool.h>
 #include <gtk-3.0/gtk/gtk.h>
-#include "http.h"
+#include <gs.h>
 #include "config.h"
 #include "main_window.h"
 
-static void startup(GtkApplication *app, gpointer user_data)
+static void activate(GtkApplication *app, gpointer user_data)
 {
+    GSClient *gs_client;
+
     config_load();
-    if (http_init()) {
-        exit(EXIT_FAILURE);
-    }
-}
+    if(gs_init())
+        g_application_quit(G_APPLICATION(app));
 
-static void activate(GtkApplication *app, gpointer user_data)
-{
-    create_main_window(app, NULL);
+    gs_client = gs_client_new(config->instance_url, config->client_id, 
+            config->client_secret);
+    if(!gs_client) 
+        g_application_quit(G_APPLICATION(app));
+
+    create_main_window(app, gs_client);
 }
 
 int main(int argc, char **argv)
@@ -27,12 +29,12 @@ int main(int argc, char **argv)
     int status;
 
     app = gtk_application_new("org.gtk.ap_client", G_APPLICATION_FLAGS_NONE);
-    g_signal_connect(app, "startup", G_CALLBACK(startup), NULL);
     g_signal_connect(app, "activate", G_CALLBACK(activate), NULL);
     status = g_application_run(G_APPLICATION(app), argc, argv);
+
     g_object_unref(app);
-    http_cleanup();
     config_cleanup();
+    gs_cleanup();
 
     return status;
 }
diff --git a/src/main_window.c b/src/main_window.c
index 048de51..bf1f50d 100644
--- a/src/main_window.c
+++ b/src/main_window.c
@@ -4,15 +4,13 @@
 #include <stdlib.h>
 #include <stdbool.h>
 #include <gtk-3.0/gtk/gtk.h>
-#include "auth.h"
-#include "http.h"
-#include "timeline.h"
+#include <gs.h>
 #include "log.h"
 #include "config.h"
 #include "login_window.h"
-#include "string-util.h"
 
 static GtkWidget *window, *scrolled, *list_box;
+static GSClient *gs_client = NULL;
 
 static gchar *html_to_pango(const char *content)
 {
@@ -61,7 +59,7 @@ static gchar *html_to_pango(const char *content)
 
 static gboolean timeline_loaded(gpointer data)
 {
-    struct timeline *t = data;
+    struct gs_timeline *t = data;
     for (size_t i = 0; i < t->size; i++) {
         GtkBuilder *post_builder;
         GObject *post_box, *post_content_label;
@@ -116,24 +114,28 @@ static gboolean timeline_loaded(gpointer data)
         gtk_widget_show_all(GTK_WIDGET(post_box));
     }
     /* gtk_spinner_stop(GTK_SPINNER(spinner)); */
-    timeline_free(t);
+    gs_timeline_free(t);
     return G_SOURCE_REMOVE;
 }
 
 static gpointer load_timeline(gpointer data)
 {
-    struct timeline *t;
-    t = get_timeline(NULL, NULL, NULL, 20);
+    struct gs_timeline *t;
+
+    t = gs_timeline_get(gs_client, NULL, NULL, NULL, 20);
     if (!t) {
         log_msg(LOG_WARNING, "load_timeline", "failed");
         return NULL;
     }
+
     gdk_threads_add_idle(timeline_loaded, t);
     return NULL;
 }
 
 void create_main_window(GtkApplication *app, gpointer user_data)
 {
+    gs_client = user_data;
+
     window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
     gtk_window_set_application(GTK_WINDOW(window), GTK_APPLICATION(app));
     gtk_window_set_title(GTK_WINDOW(window), "ap_client");
@@ -156,12 +158,14 @@ void create_main_window(GtkApplication *app, gpointer user_data)
     gtk_container_add(GTK_CONTAINER(scrolled), list_box);
     gtk_widget_show_all(window);
 
-    if (!is_logged_in()) {
+    
+    if (!gs_auth_is_logged_in(client)) {
         create_login_dialog();
     }
-    if (!is_logged_in()) {
+    if (!gs_auth_is_logged_in(client)) {
         log_msg(LOG_ERROR, "create_main_window",
                 "login is required to view timeline");
     }
-    g_thread_new("load_timeline_thread", &load_timeline, NULL);
+
+    g_thread_new("load_timeline_thread", &load_timeline, client);
 }
diff --git a/src/register.h b/src/register.h
deleted file mode 100644
index 2122d6b..0000000
--- a/src/register.h
+++ /dev/null
@@ -1,8 +0,0 @@
-#ifndef __REGISTER_H
-#define __REGISTER_H
-
-int register_app(const char *domain);
-
-#endif
-
-
diff --git a/src/timeline.h b/src/timeline.h
deleted file mode 100644
index 296bbe8..0000000
--- a/src/timeline.h
+++ /dev/null
@@ -1,16 +0,0 @@
-#ifndef __TIMELINE_H
-#define __TIMELINE_H
-
-#include "status.h"
-
-struct timeline {
-    struct status **statuses;
-    size_t size;
-};
-
-struct timeline *timeline_from_json(const char *);
-void timeline_free(struct timeline *);
-struct timeline *get_timeline(const char *max_id, const char *since_id, const char *min_id,
-        int limit);
-
-#endif