Created first project saving it and reading from .pit file!

src/db.c

@@ -0,0 +1,54 @@
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <time.h>
+#include "pit.h"
+#include "db.h"
+#include "activity.h"
+#include "user.h"
+
+#define PITFILE "/tmp/.pit"
+
+void pit_db_load() {
+    FILE *pitfile = fopen(PITFILE, "r");
+
+    if (pitfile) {
+        projects   = pit_table_load(pitfile);
+        tasks      = pit_table_load(pitfile);
+        notes      = pit_table_load(pitfile);
+        activities = pit_table_load(pitfile);
+        users      = pit_table_load(pitfile);
+        fclose(pitfile);
+    } else {
+        pit_db_initialize();
+    }
+}
+
+void pit_db_initialize() {
+    projects   = pit_table_initialize(sizeof(Project),  TABLE_HAS_ID | TABLE_HAS_TIMESTAMPS);
+    tasks      = pit_table_initialize(sizeof(Task),     TABLE_HAS_ID | TABLE_HAS_TIMESTAMPS);
+    notes      = pit_table_initialize(sizeof(Note),     TABLE_HAS_ID | TABLE_HAS_TIMESTAMPS);
+    activities = pit_table_initialize(sizeof(Activity), TABLE_HAS_CREATED_AT);
+    users      = pit_table_initialize(sizeof(User),     TABLE_HAS_ID);
+
+    pit_table_insert(users,      (uchar *)pit_current_user());
+    pit_table_insert(activities, (uchar *)pit_add_activity(0, "", "Initialized pit", 1));
+
+    pit_db_save();
+}
+
+void pit_db_save() {
+    FILE *pitfile = fopen(PITFILE, "wb");
+
+    if (!pitfile) {
+        die_with_errno(PITFILE);
+    } else {
+        pit_table_save(pitfile, projects);
+        pit_table_save(pitfile, tasks);
+        pit_table_save(pitfile, notes);
+        pit_table_save(pitfile, activities);
+        pit_table_save(pitfile, users);
+
+        fclose(pitfile);
+    }
+}