tasks: add route to list tasks

src/tasks.js

@@ -3,6 +3,7 @@
 exports = module.exports = {
     get: get,
     update: update,
+    listPaged: listPaged,
 
     startTask: startTask,
     stopTask: stopTask,
@@ -170,3 +171,16 @@ function stopTask(id, auditSource, callback) {
 
     callback(null);
 }
+
+function listPaged(type, page, perPage, callback) {
+    assert(typeof type === 'string' || type === null);
+    assert.strictEqual(typeof page, 'number');
+    assert.strictEqual(typeof perPage, 'number');
+    assert.strictEqual(typeof callback, 'function');
+
+    taskdb.listPaged(type, page, perPage, function (error, tasks) {
+        if (error) return callback(new TaskError(TaskError.INTERNAL_ERROR, error));
+
+        callback(null, tasks);
+    });
+}