implement usr_msg_id

android/app/src/main/java/com/blackforestbytes/simplecloudnotifier/SCNApp.java

@@ -102,29 +102,29 @@ public class SCNApp extends Application implements LifecycleObserver
 /*
  ==TODO==
 
- - Pro mode
-    - no ads
-    - more quota
-    - restore pro mode
-    - send pro state to server
+[X] - Pro mode
+[X]    - no ads
+[X]    - more quota
+[X]    - restore pro mode
+[X]    - send pro state to server
 
- - prevent duplicate-send
-    - send custom msg-id in API
-    - prevent second ack on same msg-id
+[X] - prevent duplicate-send
+[X]    - send custom msg-id in API
+[X]    - prevent second ack on same msg-id
 
- - more in-depth API doc on website (?)
+[X]  - more in-depth API doc on website (?)
 
- - perhaps response codes in api (?)
+[X]  - perhaps response codes in api (?)
 
- - test notification channels
+[ ]  - test notification channels
 
- - publish (+ HN post ?)
+[ ] - publish (+ HN post ?)
 
- - Use for mscom server errrors
- - Use for bfb server errors
- - Use for transmission state
-    - Message on connnection lost (seperate process - resend until succ)
-    - Message on connnection regained
-    - Message on seed-count changed
+[ ] - Use for mscom server errrors
+[ ] - Use for bfb server errors
+[ ] - Use for transmission state
+[ ]    - Message on connnection lost (seperate process - resend until succ)
+[ ]    - Message on connnection regained
+[ ]    - Message on seed-count changed
 
 */

web/model.php

@@ -197,3 +197,21 @@ function api_return($http_code, $message)
 	echo $message;
 	die();
 }
+
+/**
+ * @param String $str
+ * @param String[] $path
+ */
+function try_json($str, $path)
+{
+	try
+	{
+		$o = json_decode($str);
+		foreach ($path as $p) $o = $o[$p];
+		return $o;
+	}
+	catch (Exception $e)
+	{
+		return null;
+	}
+}

web/schema.sql

@@ -15,3 +15,20 @@ CREATE TABLE `users`
 
 	PRIMARY KEY (`user_id`)
 );
+
+CREATE TABLE `messages`
+(
+	`scn_message_id`     INT(11)         NOT NULL   AUTO_INCREMENT,
+	`sender_user_id`     INT(11)         NOT NULL,
+
+	`timestamp`          DATETIME        NOT NULL   DEFAULT CURRENT_TIMESTAMP,
+
+	`title`              VARCHAR(256)    NOT NULL,
+	`content`            VARCHAR(12288)      NULL,
+	`priority`           INT(11)         NOT NULL,
+
+	`fcn_message_id`     VARCHAR(256)    NOT NULL,
+	`usr_message_id`     VARCHAR(256)        NULL,
+
+	PRIMARY KEY (`scn_message_id`)
+)

web/send.php

@@ -23,6 +23,7 @@ try
 	$message  = $INPUT['title'];
 	$content  = isset($INPUT['content'])  ? $INPUT['content']  : '';
 	$priority = isset($INPUT['priority']) ? $INPUT['priority'] : '1';
+	$usrmsgid = isset($INPUT['msg_id'])   ? $INPUT['msg_id'] : null;
 
 //------------------------------------------------------------------
 
@@ -53,6 +54,29 @@ try
 	if ($data['quota_day'] === null || $data['quota_day'] !== date("Y-m-d")) $new_quota=1;
 	if ($new_quota > Statics::quota_max($data['is_pro'])) api_return(403, json_encode(['success' => false, 'error' => 2101, 'errhighlight' => -1, 'message' => 'Daily quota reached ('.Statics::quota_max($data['is_pro']).')']));
 
+//------------------------------------------------------------------
+
+	if ($usrmsgid != null)
+	{
+		$stmt = $pdo->prepare('SELECT scn_message_id FROM messages WHERE sender_user_id=:uid AND usr_message_id IS NOT NULL AND usr_message_id=:umid LIMIT 1');
+		$stmt->execute(['uid' => $user_id, 'umid' => $usrmsgid]);
+
+		if (count($stmt->fetchAll(PDO::FETCH_ASSOC))>0)
+		{
+			api_return(200, json_encode(
+			[
+				'success'       => true,
+				'message'       => 'Message already sent',
+				'suppress_send' => true,
+				'response'      => '',
+				'messagecount'  => $data['messages_sent']+1,
+				'quota'         => $data['quota_today'],
+				'is_pro'        => $data['is_pro'],
+				'quota_max'     => Statics::quota_max($data['is_pro']),
+			]));
+		}
+	}
+
 //------------------------------------------------------------------
 
 	$url = "https://fcm.googleapis.com/fcm/send";
@@ -72,6 +96,7 @@ try
 				'body'       => $content,
 				'priority'   => $priority,
 				'timestamp'  => time(),
+				'usr_msg_id' => $usrmsgid,
 			]
 	]);
 	$header=
@@ -83,6 +108,12 @@ try
 	try
 	{
 		$httpresult = sendPOST($url, $payload, $header);
+
+		if (try_json($httpresult, ['success']) != 1)
+		{
+			reportError("FCM communication failed (success_1 <> true)\n\n".$httpresult);
+			api_return(403, json_encode(['success' => false, 'error' => 9902, 'errhighlight' => -1, 'message' => 'Communication with firebase service failed.']));
+		}
 	}
 	catch (Exception $e)
 	{
@@ -93,10 +124,22 @@ try
 	$stmt = $pdo->prepare('UPDATE users SET timestamp_accessed=NOW(), messages_sent=messages_sent+1, quota_today=:q, quota_day=NOW() WHERE user_id = :uid');
 	$stmt->execute(['uid' => $user_id, 'q' => $new_quota]);
 
+	$stmt = $pdo->prepare('INSERT INTO messages (sender_user_id, title, content, priority, fcn_message_id, usr_message_id) VALUES (:suid, :t, :c, :p, :fmid, :umid)');
+	$stmt->execute(
+	[
+		'suid' => $user_id,
+		't'    => $message,
+		'c'    => $content,
+		'p'    => $priority,
+		'fmid' => try_json($httpresult, ['results', 'message_id']),
+		'umid' => $usrmsgid,
+	]);
+
 	api_return(200, json_encode(
 	[
 		'success'       => true,
 		'message'       => 'Message sent',
+		'suppress_send' => false,
 		'response'      => $httpresult,
 		'messagecount'  => $data['messages_sent']+1,
 		'quota'         => $new_quota,