Add post editing capability (#2828)

* Add post editing capability

* Don't try to reprocess already uploaded attachments.
Fixes editing posts with existing media

* Don't mark post edits as modified until editing occurs

* Disable UI for things that can't be edited when editing a post

* Finally convert SFragment to kotlin

* Use api endpoint for fetching status source for editing

* Apply review feedback

app/src/main/java/com/keylesspalace/tusky/service/SendStatusService.kt

@@ -168,12 +168,24 @@ class SendStatusService : Service(), Injectable {
                 statusToSend.language,
             )
 
-            mastodonApi.createStatus(
-                "Bearer " + account.accessToken,
-                account.domain,
-                statusToSend.idempotencyKey,
-                newStatus
-            ).fold({ sentStatus ->
+            val sendResult = if (statusToSend.statusId == null) {
+                mastodonApi.createStatus(
+                    "Bearer " + account.accessToken,
+                    account.domain,
+                    statusToSend.idempotencyKey,
+                    newStatus
+                )
+            } else {
+                mastodonApi.editStatus(
+                    statusToSend.statusId,
+                    "Bearer " + account.accessToken,
+                    account.domain,
+                    statusToSend.idempotencyKey,
+                    newStatus
+                )
+            }
+
+            sendResult.fold({ sentStatus ->
                 statusesToSend.remove(statusId)
                 // If the status was loaded from a draft, delete the draft and associated media files.
                 if (statusToSend.draftId != 0) {
@@ -278,6 +290,7 @@ class SendStatusService : Service(), Injectable {
             failedToSend = true,
             scheduledAt = status.scheduledAt,
             language = status.language,
+            statusId = status.statusId,
         )
     }
 
@@ -387,4 +400,5 @@ data class StatusToSend(
     var retries: Int,
     val mediaProcessed: MutableList<Boolean>,
     val language: String?,
+    val statusId: String?,
 ) : Parcelable