added sqlite database for data storage

.gitignore

@@ -1,2 +1,3 @@
-data/
-*.tar.gz
+data/epg
+data/logo
+*.tar.gz

src/channel.h

@@ -45,6 +45,7 @@ struct channel{
    GString* logoFile;
    GString* logoUrl;
    GArray* programmeList;
+   long lastUpdated;
 } typedef channel;
 
 #endif

src/db.c

@@ -18,6 +18,7 @@
 #include <stdio.h>
 #include <stdbool.h>
 #include <sqlite3.h>
+#include <string.h>
 #include <glib.h>
 #include "channel.h"
 
@@ -39,6 +40,111 @@ void iptvx_db_init(char* filename){
    }
 }
 
+/*
+   Checks if a programme already exists in the database and returns it's id
+   @param         chanid         id of the channel the programme is on
+   @param         prog           programme struct with the actual data
+   @return                       db id of the programme or -1 if not exists
+*/
+long iptvx_db_get_programme_id(int chanid, programme* prog){
+   long result = -1;
+
+   /* prepare the sql statement */
+   char* sql = sqlite3_mprintf("SELECT programmeid FROM programme "
+                              "WHERE programmetitle = '%q' "
+                              "AND programmestart = %lld "
+                              "AND programmestop = %lld "
+                              "AND programmechannelid = %lld",
+                              prog->title->str, prog->start, 
+                              prog->stop, chanid);
+
+   sqlite3_stmt *stmt;
+   sqlite3_prepare_v2(db, sql, -1, &stmt, NULL);
+   while (sqlite3_step(stmt) != SQLITE_DONE) {
+      int i;
+      int column_count = sqlite3_column_count(stmt);
+      for(i = 0; i < column_count; i++){
+         result = sqlite3_column_int64(stmt, i);
+      }
+   }
+
+   return result;
+}
+
+/*
+   Gets the id of a category by it's name. 
+   If it doesn't exist, it'll be created
+   @param         category_name     name of the category to get id for
+   @return                          id of the category
+*/
+long iptvx_db_get_category_id(char* category_name){
+   long result = -1;
+
+   if(category_name != NULL && strlen(category_name) > 0){
+      /* prepare the sql statement */
+      char* sql = sqlite3_mprintf("SELECT categoryid FROM category "
+                                 "WHERE categoryname = '%q'", category_name);
+
+      sqlite3_stmt *stmt;
+      sqlite3_prepare_v2(db, sql, -1, &stmt, NULL);
+      while (sqlite3_step(stmt) != SQLITE_DONE) {
+         int i;
+         int column_count = sqlite3_column_count(stmt);
+         for(i = 0; i < column_count; i++){
+            result = sqlite3_column_int64(stmt, i);
+         }
+      }
+
+      if(result == -1){
+         char* insert_sql = sqlite3_mprintf("INSERT INTO category "
+                  "(categoryname) VALUES ('%q')", category_name);
+         sqlite3_exec(db,insert_sql,NULL,NULL,NULL);
+         sqlite3_free(insert_sql);
+         result = sqlite3_last_insert_rowid(db);
+      }
+   }
+
+   return result;
+}
+
+/*
+   Inserts a channel's programme into the db if it does not yet exist
+   @param         chanid      db id of the channel to add programme to
+   @param         prog        programme struct with the programme
+*/
+void iptvx_db_insert_programme(int chanid, programme* prog){
+   /* check if the programme is already in the database */
+   long exist_prog_id = iptvx_db_get_programme_id(chanid,prog);
+
+   /* get the category id from the database */
+   long exist_category_id = iptvx_db_get_category_id(prog->category->str);
+
+   if(exist_prog_id >= 0){
+      /* programme already exists in db, just update it */
+      char* update_sql = sqlite3_mprintf("UPDATE programme "
+                  "SET programmedescription = '%q', "
+                  "programmecategoryid = %lld, "
+                  "programmeproductiondate = %lld "
+                  "WHERE programmeid = %lld",
+                  prog->description->str, exist_category_id,
+                  prog->productionDate, exist_prog_id);
+      sqlite3_exec(db,update_sql,NULL,NULL,NULL);
+      sqlite3_free(update_sql);
+   }else{
+      /* the programme is not in the database, insert it */
+      char* insert_sql = sqlite3_mprintf(
+            "INSERT INTO programme (programmetitle, programmedescription, "
+            "programmecategoryid, programmestart, programmestop, "
+            "programmeproductiondate, programmechannelid) VALUES "
+            "('%q','%q',%lld,%lld,%lld,%lld,%lld)",
+            prog->title->str, prog->description->str,
+            exist_category_id, prog->start, prog->stop, 
+            prog->productionDate, chanid);
+      sqlite3_exec(db,insert_sql,NULL,NULL,NULL);
+      sqlite3_free(insert_sql);
+   }
+}
+
 /*
    Inserts a channel into the db if it doesn't exist
    @param         chan        the channel struct
@@ -78,6 +184,25 @@ void iptvx_db_insert_channel(channel* chan){
       sqlite3_free(insert_sql);
    }
 
+   /* get the id of the channel */
+   int channelid = -1;
+   char* get_id_sql = sqlite3_mprintf("SELECT channelid FROM channel "
+                        "WHERE channelname = '%q'",chan->name->str);
+   sqlite3_stmt *getid_stmt;
+   sqlite3_prepare_v2(db,get_id_sql, -1, &getid_stmt, NULL);
+   while(sqlite3_step(getid_stmt) != SQLITE_DONE){
+      channelid = sqlite3_column_int64(getid_stmt,0);
+   }
+
+   /* make sure the channel exists and has an id */
+   if(channelid != -1){
+      int p = 0;
+      for(p = 0;p < chan->programmeList->len; p++){
+         programme* prog = &g_array_index(chan->programmeList,programme,p);
+         iptvx_db_insert_programme(channelid,prog);
+      }
+   }
+
    /* finalise statement */
    sqlite3_finalize(stmt);
    sqlite3_free(sql);