Merge pull request 'Added PullPostDescriptions' (#28) from 12-pullpostdescription into master

Reviewed-on: #28

BlogDB.c

@@ -14,6 +14,7 @@ static int EditPost(int postID, char title[], char post[], MYSQL* con);
 static int AddFilePost(int authorID, char filePath[], MYSQL* con);
 static int BlogWrite(MYSQL* con);
 static int PullPostData(char* strings[6], int postID, MYSQL* con); 
+static int PullPostDescriptions(int** IDs, char* Titles[255], int** authors, int** dates, MYSQL* con);
 static int AddTag(char tagTitle[], MYSQL* con);
 static int DeleteTag(int tagID, MYSQL* con);
 static int EditTag(int tagID, char tagTitle[], MYSQL* con);
@@ -337,6 +338,91 @@ int PullPostData(char* strings[6], int postID, MYSQL* con)
     return postID;
 }
 
+int PullPostDescriptions(int** IDs, char* Titles[255], int** authors, int** dates, MYSQL* con)
+{
+    if (con == NULL) 
+    {
+        con = conn2maria();
+    }
+
+    // Query the server, if successful continue, else throw error
+    if (mysql_query(con, "SELECT COUNT(*) FROM blog_posts"))
+    {
+        fprintf(stderr, "%s\n", mysql_error(con));
+        mysql_close(con);
+        exit(1);
+    }
+
+    // Get results
+    MYSQL_RES *result = mysql_store_result(con);
+    MYSQL_ROW row;
+    row = mysql_fetch_row(result);
+
+    // Get the Count
+    int count = atoi(row[0]);
+
+    free(result);
+   
+    // Query the server, if successful continue, else throw error
+    if (mysql_query(con, "SELECT id,title,author_id,date_posted FROM blog_posts WHERE state=0;")) 
+    {
+        fprintf(stderr, "%s\n", mysql_error(con));
+        mysql_close(con);
+        exit(1);
+    }
+
+    MYSQL_RES *result2 = mysql_store_result(con);
+
+    // Allocate the array that was passed by reference
+    // To be one larger than I need.
+    *IDs = (int *)malloc(sizeof(int) * (count + 1));
+    *authors = (int *)malloc(sizeof(int) * (count + 1));
+    *dates = (int *)malloc(sizeof(int) * (count + 1));
+    *Titles = (char **)malloc((count + 1) * sizeof(char *));
+
+    for (int i = 0; i < count + 1; ++i) {
+        Titles[i] = malloc(sizeof(char) * 255);
+    }
+
+
+    //*Titles = (char *)malloc(((count + 1) * 255) * sizeof(char));
+
+
+    // loop count times.
+    for (int i = 0; i < count; ++i) {
+        //Get row
+        row = mysql_fetch_row(result2);
+
+        // If the row exists (I counted them, so it must exist.)
+        if (row != NULL) {
+            // Set the i-th element of the array, that was passed by reference, to be the current row's ID
+            //*(*arr + i) = atoi(row[0]);
+
+            *(*IDs + i) = atoi(row[0]);
+            *(*authors + i) = atoi(row[2]);
+            *(*dates + i) = atoi(row[3]);
+            
+            for (int y = 0; y < 255; ++y) {
+                Titles[i][y] = row[1][y];
+            }
+
+        }
+    }
+
+    // Set the last element in the array passed by reference to -1,
+    // As an ID can never be negative, it can ensure that it never
+    // Enters unknown memory.
+    //*(*arr + count) = -1;
+    *(*IDs + count) = -1;
+
+    *(*authors + count) = -1;
+    *(*dates + count) = -1;
+    *(*Titles + count) = "";
+
+    // Return the count, for easy looping.
+    return count;
+}
+
 // Adds a tag
 int AddTag(char tagTitle[], MYSQL* con)
 {
@@ -1122,6 +1208,33 @@ int main(int argc, char *argv[])
     // Free the memory
     free(authorIDs);
     
+    // ===================================
+    */
+
+    /*
+    // ===================================
+    // Example of using 'PullPostDescriptions()'
+    // ===================================
+
+    // Generate array of IDs
+    int *IDs;
+    int *authors;
+    int *dates;
+    char *Titles[255];
+    int count4 = PullPostDescriptions(&IDs, &Titles, &authors, &dates, NULL);
+
+    // Loop until element is negative i.e. the last
+    for (int i = 0; i < count4; ++i) 
+    {
+        // Print contents on a new line
+        printf("%d %s %d %d\n", IDs[i], Titles[i], authors[i], dates[i]);
+    }
+
+    // Free the memory
+    free(IDs);
+    free(authors);
+    free(dates);
+    
     // ===================================
    */
 
@@ -1131,7 +1244,7 @@ int main(int argc, char *argv[])
     // AddPost return the inserted rows, NULL pointer for no tags, 0 for size
     //
     //int tags[] = {1, 2, 3};
-    //printf("%d", AddPost("Something", 1, "2020-01-01", "Ssdjshdjahdkjomething", tags, sizeof(tags)));
+    //printf("%d", AddPost("Something", 2, "2020-01-01", "Ssdjshdjahdkjomething", tags, sizeof(tags), con));
 
     //AssignTag(6, 42, con);
     //EditPost(69, "HEY", "THERE BUDDY", con);
@@ -1140,7 +1253,7 @@ int main(int argc, char *argv[])
     //RetractTag(1, 1, con);
     //EditTag(5, "Projects", con);
     //AddAuthor("Me", "Meson", "email@me.com", con);
-    //ChangeAuthor(62, 2, con);
+    //ChangeAuthor(93, 1, con);
     //TogglePost(81, con);
     //printf("%s\n", IsEnabled(81, con) ? "True" : "False");
     //AddFilePost(1, "/home/adam/Documents/html/linuxenv.html", con);