Added active_id increment in schema

src/dodo.c

@@ -245,7 +245,7 @@ int update_task_status(sqlite3 *db, int argc, char** argv){
 		return 0;
 	}
 
-	checksqlerr(rc, "broken in add_new_task");
+	checksqlerr(rc, "broken in update_task_status");
 	return 1;
 
 }
@@ -265,7 +265,7 @@ int del_task(sqlite3 *db, int argc, char** argv){
 		return 0;
 	}
 
-	checksqlerr(rc, "broken in add_new_task");
+	checksqlerr(rc, "broken in del_task");
 	return 1;
 }
 
@@ -275,8 +275,8 @@ int del_task(sqlite3 *db, int argc, char** argv){
 int add_new_task(sqlite3 *db, int argc, char** argv){
 	int rc = 0;
 	char* table = "tasks";
-	char* title;
-	char* due_date;
+	char* title = NULL;
+	char* due_date = NULL;
 	char* colnames = "(title, due_date)";
 	char values[100];
 	sqlite3_stmt* out_stmt;

src/dodo.schema

@@ -1,6 +1,6 @@
 CREATE TABLE tasks(
 	task_id INTEGER PRIMARY KEY,
-	title TEXT NOT NULL,
+	title TEXT NOT NULL UNIQUE,
 	active_id INTEGER UNIQUE,
 	status TEXT NOT NULL DEFAULT 'backlog',
 	creation_date DATE DEFAULT (date('now')),
@@ -11,6 +11,17 @@ CREATE TABLE tasks(
 		)
 );
 
+-- Basically when we add a new task the active id is set
+-- but when a task is done we want it to be able to be null so we need to increment
+-- COALESCE is a cool function that returns the first non-null argument which takes care of empty
+-- active task list
+CREATE TRIGGER autoinc_active_id
+AFTER INSERT ON tasks
+BEGIN
+	UPDATE tasks SET active_id = (SELECT COALESCE((SELECT MAX(active_id) FROM tasks) + 1, 1)) WHERE task_id=NEW.task_id;
+
+END;
+
 CREATE TABLE entries(
 	entry_id INTEGER PRIMARY KEY,
 	task_id INTEGER NOT NULL REFERENCES tasks(task_id),