From 12f1cb7985b7d6adddfb71a5103a6d979a3089e4 Mon Sep 17 00:00:00 2001
From: Inex Code <gitea@inex.rocks>
Date: Thu, 21 Apr 2022 07:21:05 +0000
Subject: [PATCH] Try out posting in a thread.

---
 bin/server.dart | 60 +++++++++++++++++++++++++++++++++++++++++--------
 1 file changed, 51 insertions(+), 9 deletions(-)

diff --git a/bin/server.dart b/bin/server.dart
index 24799e3..abf17ef 100644
--- a/bin/server.dart
+++ b/bin/server.dart
@@ -72,22 +72,32 @@ Future<void> _postOnMastodon(reqJson) async {
   // The 'height' and 'width' fields are the height and width of the photo.
   // We download all pictures with dio into a temporary directory.
 
-  final postText = reqJson['object']['text'] ?? '';
+  // Make sure post text is 500 characters or less.
+  String postText = reqJson['object']['text'];
+  if (postText.length > 500) {
+    postText.substring(0, 500);
+  }
 
   final attachments = reqJson['object']['attachments'] ?? [];
 
-  final photos =
-      attachments.where((attachment) => attachment['type'] == 'photo');
+  var photos = attachments.where((attachment) => attachment['type'] == 'photo');
+
+  // If there are more than four photos, move other photos to another array to be posted in the thread.
+  var otherPhotos = [];
+  if (photos.length > 4) {
+    otherPhotos = photos.skip(4).toList();
+    photos = photos.take(4).toList();
+  }
 
   List<String> photoUrls = [];
-  
+
   for (final photo in photos) {
     final photoUrl = photo['photo']['sizes'].last['url'];
     // Generate a random filename.
     // Add the extension '.jpg'.
-    final photoFilename = '${DateTime.now().millisecondsSinceEpoch}-${photoUrl.split('/').last.split('?').first.substring(0, 10)}.jpg';
-    final photoPath =
-        '${Directory.systemTemp.path}/$photoFilename';
+    final photoFilename =
+        '${DateTime.now().millisecondsSinceEpoch}-${photoUrl.split('/').last.split('?').first.substring(0, 10)}.jpg';
+    final photoPath = '${Directory.systemTemp.path}/$photoFilename';
     await dio.download(photoUrl, photoPath);
     photoUrls.add(photoPath);
   }
@@ -115,18 +125,50 @@ Future<void> _postOnMastodon(reqJson) async {
 
     for (final photoUrl in photoUrls) {
       final resp = await dio.post('$instanceUrl/api/v1/media',
-          data: dio_lib.FormData.fromMap({'file': dio_lib.MultipartFile.fromFileSync(photoUrl)}),
+          data: dio_lib.FormData.fromMap(
+              {'file': dio_lib.MultipartFile.fromFileSync(photoUrl)}),
           options:
               dio_lib.Options(headers: {'Authorization': 'Bearer $authToken'}));
       mediaIds.add(resp.data['id']);
     }
 
-    await dio.post('$instanceUrl/api/v1/statuses',
+    var postResponse = await dio.post('$instanceUrl/api/v1/statuses',
         data: {'status': postText, 'media_ids': mediaIds},
         options:
             dio_lib.Options(headers: {'Authorization': 'Bearer $authToken'}));
 
     await Future.wait(photoUrls.map((photoUrl) => File(photoUrl).delete()));
+
+    // If there are other photos, post them in a thread.
+    while (otherPhotos.isNotEmpty) {
+      mediaIds = [];
+      if (otherPhotos.length > 4) {
+        otherPhotos = otherPhotos.skip(4).toList();
+        photos = otherPhotos.take(4).toList();
+      } else {
+        photos = otherPhotos;
+        otherPhotos = [];
+      }
+
+      for (final photoUrl in photoUrls) {
+        final resp = await dio.post('$instanceUrl/api/v1/media',
+            data: dio_lib.FormData.fromMap(
+                {'file': dio_lib.MultipartFile.fromFileSync(photoUrl)}),
+            options: dio_lib.Options(
+                headers: {'Authorization': 'Bearer $authToken'}));
+        mediaIds.add(resp.data['id']);
+      }
+
+      postResponse = await dio.post('$instanceUrl/api/v1/statuses',
+          data: {
+            'in_reply_to_id': postResponse.data['id'],
+            'media_ids': mediaIds
+          },
+          options:
+              dio_lib.Options(headers: {'Authorization': 'Bearer $authToken'}));
+
+      await Future.wait(photoUrls.map((photoUrl) => File(photoUrl).delete()));
+    }
   }
 }