Adds Duplicate/Copy post functionality (#13521)

* Added Copy Button in the UI

* Copy post without the editor

* Tests copy post action

* Resolve conflicts with edit

* Updated release notes

* Refresh list after post creation

* Updated fluxc version

RELEASE-NOTES.txt

@@ -1,7 +1,8 @@
 16.4
 -----
 * [*] My Site: Fixes crash on rotation while editing site title [https://github.com/wordpress-mobile/WordPress-Android/pull/13505]
-
+* [**] Posts List: Adds duplicate post functionality [https://github.com/wordpress-mobile/WordPress-Android/pull/13521]
+
 16.3
 -----
 * [***] Site Creation: Adds an option to pick a home page design when creating a WordPress.com site.

WordPress/src/main/java/org/wordpress/android/ui/posts/PostActionHandler.kt

@@ -34,6 +34,7 @@ import org.wordpress.android.util.ToastUtils.Duration
 import org.wordpress.android.viewmodel.helpers.ToastMessageHolder
 import org.wordpress.android.widgets.PostListButtonType
 import org.wordpress.android.widgets.PostListButtonType.BUTTON_CANCEL_PENDING_AUTO_UPLOAD
+import org.wordpress.android.widgets.PostListButtonType.BUTTON_COPY
 import org.wordpress.android.widgets.PostListButtonType.BUTTON_DELETE
 import org.wordpress.android.widgets.PostListButtonType.BUTTON_DELETE_PERMANENTLY
 import org.wordpress.android.widgets.PostListButtonType.BUTTON_EDIT
@@ -67,7 +68,8 @@ class PostActionHandler(
     private val checkNetworkConnection: () -> Boolean,
     private val showSnackbar: (SnackbarMessageHolder) -> Unit,
     private val showToast: (ToastMessageHolder) -> Unit,
-    private val triggerPreviewStateUpdate: (PostListRemotePreviewState, PostInfoType) -> Unit
+    private val triggerPreviewStateUpdate: (PostListRemotePreviewState, PostInfoType) -> Unit,
+    private val copyPost: (SiteModel, PostModel, Boolean) -> Unit
 ) {
     private val criticalPostActionTracker = CriticalPostActionTracker(onStateChanged = {
         invalidateList.invoke()
@@ -112,6 +114,7 @@ class PostActionHandler(
                     else -> trashPost(post)
                 }
             }
+            BUTTON_COPY -> copyPost(site, post, true)
             BUTTON_DELETE, BUTTON_DELETE_PERMANENTLY -> {
                 postListDialogHelper.showDeletePostConfirmationDialog(post)
             }
@@ -168,6 +171,13 @@ class PostActionHandler(
         triggerPostUploadAction.invoke(PublishPost(dispatcher, site, post))
     }
 
+    fun resolveConflictsAndEditPost(localPostId: Int) {
+        val post = postStore.getPostByLocalPostId(localPostId)
+        if (post != null) {
+            performChecksAndEdit(site, post)
+        }
+    }
+
     fun moveTrashedPostToDraft(localPostId: Int) {
         val post = postStore.getPostByLocalPostId(localPostId)
         if (post != null) {
@@ -198,7 +208,9 @@ class PostActionHandler(
         showSnackbar.invoke(snackBarHolder)
     }
 
-    private fun editPostButtonAction(site: SiteModel, post: PostModel) {
+    private fun editPostButtonAction(site: SiteModel, post: PostModel) = performChecksAndEdit(site, post)
+
+    private fun performChecksAndEdit(site: SiteModel, post: PostModel) {
         // first of all, check whether this post is in Conflicted state with a more recent remote version
         if (doesPostHaveUnhandledConflict.invoke(post)) {
             postListDialogHelper.showConflictedPostResolutionDialog(post)

WordPress/src/main/java/org/wordpress/android/ui/posts/PostListActionTracker.kt

@@ -6,6 +6,7 @@ import org.wordpress.android.fluxc.model.SiteModel
 import org.wordpress.android.util.analytics.AnalyticsUtils
 import org.wordpress.android.widgets.PostListButtonType
 import org.wordpress.android.widgets.PostListButtonType.BUTTON_CANCEL_PENDING_AUTO_UPLOAD
+import org.wordpress.android.widgets.PostListButtonType.BUTTON_COPY
 import org.wordpress.android.widgets.PostListButtonType.BUTTON_DELETE
 import org.wordpress.android.widgets.PostListButtonType.BUTTON_DELETE_PERMANENTLY
 import org.wordpress.android.widgets.PostListButtonType.BUTTON_EDIT
@@ -39,6 +40,7 @@ fun trackPostListAction(site: SiteModel, buttonType: PostListButtonType, postDat
         BUTTON_PREVIEW -> "preview"
         BUTTON_STATS -> "stats"
         BUTTON_TRASH -> "trash"
+        BUTTON_COPY -> "copy"
         BUTTON_DELETE,
         BUTTON_DELETE_PERMANENTLY -> "delete"
         BUTTON_PUBLISH -> "publish"

WordPress/src/main/java/org/wordpress/android/ui/posts/PostListDialogHelper.kt

@@ -18,6 +18,7 @@ private const val CONFIRM_TRASH_POST_WITH_UNSAVED_CHANGES_DIALOG_TAG =
 private const val CONFIRM_ON_CONFLICT_LOAD_REMOTE_POST_DIALOG_TAG = "CONFIRM_ON_CONFLICT_LOAD_REMOTE_POST_DIALOG_TAG"
 private const val CONFIRM_ON_AUTOSAVE_REVISION_DIALOG_TAG = "CONFIRM_ON_AUTOSAVE_REVISION_DIALOG_TAG"
 private const val CONFIRM_SYNC_SCHEDULED_POST_DIALOG_TAG = "CONFIRM_SYNC_SCHEDULED_POST_DIALOG_TAG"
+private const val COPY_CONFLICT_DIALOG_TAG = "COPY_CONFLICT_DIALOG_TAG"
 private const val POST_TYPE = "post_type"
 
 /**
@@ -37,6 +38,7 @@ class PostListDialogHelper(
     private var localPostIdForConflictResolutionDialog: Int? = null
     private var localPostIdForAutosaveRevisionResolutionDialog: Int? = null
     private var localPostIdForScheduledPostSyncDialog: Int? = null
+    private var localPostIdForCopyConflictDialog: Int? = null
 
     fun showMoveTrashedPostToDraftDialog(post: PostModel) {
         val dialogHolder = DialogHolder(
@@ -137,6 +139,18 @@ class PostListDialogHelper(
         showDialog.invoke(dialogHolder)
     }
 
+    fun showCopyConflictDialog(post: PostModel) {
+        val dialogHolder = DialogHolder(
+                tag = COPY_CONFLICT_DIALOG_TAG,
+                title = UiStringRes(R.string.dialog_confirm_copy_local_title),
+                message = UiStringRes(R.string.dialog_confirm_copy_local_message),
+                positiveButton = UiStringRes(R.string.dialog_confirm_copy_local_edit_button),
+                negativeButton = UiStringRes(R.string.dialog_confirm_copy_local_copy_button)
+        )
+        localPostIdForCopyConflictDialog = post.id
+        showDialog.invoke(dialogHolder)
+    }
+
     fun onPositiveClickedForBasicDialog(
         instanceTag: String,
         trashPostWithLocalChanges: (Int) -> Unit,
@@ -145,7 +159,8 @@ class PostListDialogHelper(
         publishPost: (Int) -> Unit,
         updateConflictedPostWithRemoteVersion: (Int) -> Unit,
         editRestoredAutoSavePost: (Int) -> Unit,
-        moveTrashedPostToDraft: (Int) -> Unit
+        moveTrashedPostToDraft: (Int) -> Unit,
+        resolveConflictsAndEditPost: (Int) -> Unit
     ) {
         when (instanceTag) {
             CONFIRM_DELETE_POST_DIALOG_TAG -> localPostIdForDeleteDialog?.let {
@@ -181,14 +196,19 @@ class PostListDialogHelper(
                         UNPUBLISHED_REVISION_DIALOG_LOAD_UNPUBLISHED_VERSION_CLICKED,
                         mapOf(POST_TYPE to "post"))
             }
+            COPY_CONFLICT_DIALOG_TAG -> localPostIdForCopyConflictDialog?.let {
+                localPostIdForCopyConflictDialog = null
+                resolveConflictsAndEditPost(it)
+            }
             else -> throw IllegalArgumentException("Dialog's positive button click is not handled: $instanceTag")
         }
     }
 
     fun onNegativeClickedForBasicDialog(
         instanceTag: String,
         updateConflictedPostWithLocalVersion: (Int) -> Unit,
-        editLocalPost: (Int) -> Unit
+        editLocalPost: (Int) -> Unit,
+        copyLocalPost: (Int) -> Unit
     ) {
         when (instanceTag) {
             CONFIRM_DELETE_POST_DIALOG_TAG -> localPostIdForDeleteDialog = null
@@ -207,14 +227,19 @@ class PostListDialogHelper(
                 )
             }
             CONFIRM_RESTORE_TRASHED_POST_DIALOG_TAG -> localPostIdForMoveTrashedPostToDraftDialog = null
+            COPY_CONFLICT_DIALOG_TAG -> localPostIdForCopyConflictDialog?.let {
+                localPostIdForCopyConflictDialog = null
+                copyLocalPost(it)
+            }
             else -> throw IllegalArgumentException("Dialog's negative button click is not handled: $instanceTag")
         }
     }
 
     fun onDismissByOutsideTouchForBasicDialog(
         instanceTag: String,
         updateConflictedPostWithLocalVersion: (Int) -> Unit,
-        editLocalPost: (Int) -> Unit
+        editLocalPost: (Int) -> Unit,
+        copyLocalPost: (Int) -> Unit
     ) {
         // Cancel and outside touch dismiss works the same way for all, except for conflict and autosave revision
         // dialogs, for which tapping outside and actively tapping the "edit local" have different meanings
@@ -223,7 +248,8 @@ class PostListDialogHelper(
             onNegativeClickedForBasicDialog(
                     instanceTag = instanceTag,
                     updateConflictedPostWithLocalVersion = updateConflictedPostWithLocalVersion,
-                    editLocalPost = editLocalPost
+                    editLocalPost = editLocalPost,
+                    copyLocalPost = copyLocalPost
             )
         }
     }

WordPress/src/main/java/org/wordpress/android/ui/posts/PostListMainViewModel.kt

@@ -203,8 +203,28 @@ class PostListMainViewModel @Inject constructor(
                 checkNetworkConnection = this::checkNetworkConnection,
                 showSnackbar = { _snackBarMessage.postValue(it) },
                 showToast = { _toastMessage.postValue(it) },
-                triggerPreviewStateUpdate = this::updatePreviewAndDialogState
+                triggerPreviewStateUpdate = this::updatePreviewAndDialogState,
+                copyPost = this::copyPost
+        )
+    }
+
+    fun copyPost(site: SiteModel, postToCopy: PostModel, performChecks: Boolean = false) {
+        if (performChecks && (postConflictResolver.doesPostHaveUnhandledConflict(postToCopy) ||
+                        postConflictResolver.hasUnhandledAutoSave(postToCopy))) {
+            postListDialogHelper.showCopyConflictDialog(postToCopy)
+            return
+        }
+        val post = postStore.instantiatePostModel(
+                site,
+                false,
+                postToCopy.title,
+                postToCopy.content,
+                PostStatus.DRAFT.toString(),
+                postToCopy.categoryIdList,
+                postToCopy.postFormat,
+                true
         )
+        _postListAction.postValue(PostListAction.EditPost(site, post, loadAutoSaveRevision = false))
     }
 
     /**
@@ -437,6 +457,15 @@ class PostListMainViewModel @Inject constructor(
         }
     }
 
+    private fun copyLocalPost(localPostId: Int) {
+        val post = postStore.getPostByLocalPostId(localPostId)
+        if (post != null) {
+            copyPost(site, post)
+        } else {
+            _snackBarMessage.value = SnackbarMessageHolder(UiStringRes(R.string.error_post_does_not_exist))
+        }
+    }
+
     // BasicFragmentDialog Events
 
     fun onPositiveClickedForBasicDialog(instanceTag: String) {
@@ -448,23 +477,26 @@ class PostListMainViewModel @Inject constructor(
                 publishPost = postActionHandler::publishPost,
                 updateConflictedPostWithRemoteVersion = postConflictResolver::updateConflictedPostWithRemoteVersion,
                 editRestoredAutoSavePost = this::editRestoredAutoSavePost,
-                moveTrashedPostToDraft = postActionHandler::moveTrashedPostToDraft
+                moveTrashedPostToDraft = postActionHandler::moveTrashedPostToDraft,
+                resolveConflictsAndEditPost = postActionHandler::resolveConflictsAndEditPost
         )
     }
 
     fun onNegativeClickedForBasicDialog(instanceTag: String) {
         postListDialogHelper.onNegativeClickedForBasicDialog(
                 instanceTag = instanceTag,
                 updateConflictedPostWithLocalVersion = postConflictResolver::updateConflictedPostWithLocalVersion,
-                editLocalPost = this::editLocalPost
+                editLocalPost = this::editLocalPost,
+                copyLocalPost = this::copyLocalPost
         )
     }
 
     fun onDismissByOutsideTouchForBasicDialog(instanceTag: String) {
         postListDialogHelper.onDismissByOutsideTouchForBasicDialog(
                 instanceTag = instanceTag,
                 updateConflictedPostWithLocalVersion = postConflictResolver::updateConflictedPostWithLocalVersion,
-                editLocalPost = this::editLocalPost
+                editLocalPost = this::editLocalPost,
+                copyLocalPost = this::copyLocalPost
         )
     }
 

WordPress/src/main/java/org/wordpress/android/viewmodel/posts/PostListItemUiStateHelper.kt

@@ -44,6 +44,7 @@ import org.wordpress.android.viewmodel.posts.PostListItemType.PostListItemUiStat
 import org.wordpress.android.viewmodel.uistate.ProgressBarUiState
 import org.wordpress.android.widgets.PostListButtonType
 import org.wordpress.android.widgets.PostListButtonType.BUTTON_CANCEL_PENDING_AUTO_UPLOAD
+import org.wordpress.android.widgets.PostListButtonType.BUTTON_COPY
 import org.wordpress.android.widgets.PostListButtonType.BUTTON_DELETE
 import org.wordpress.android.widgets.PostListButtonType.BUTTON_DELETE_PERMANENTLY
 import org.wordpress.android.widgets.PostListButtonType.BUTTON_EDIT
@@ -351,6 +352,7 @@ class PostListItemUiStateHelper @Inject constructor(
                 postStatus == PUBLISHED &&
                 !isLocalDraft &&
                 !isLocallyChanged
+        val canShowCopy = postStatus == PUBLISHED || postStatus == DRAFT
         val canShowViewButton = !canRetryUpload && postStatus != PostStatus.TRASHED
         val canShowPublishButton = canRetryUpload || canPublishPost
         val buttonTypes = ArrayList<PostListButtonType>()
@@ -400,6 +402,10 @@ class PostListItemUiStateHelper @Inject constructor(
             buttonTypes.add(BUTTON_STATS)
         }
 
+        if (canShowCopy) {
+            buttonTypes.add(BUTTON_COPY)
+        }
+
         return buttonTypes
     }
 

WordPress/src/main/java/org/wordpress/android/widgets/PostListButtonType.kt

@@ -36,7 +36,8 @@ enum class PostListButtonType constructor(
             R.drawable.ic_undo_white_24dp,
             R.attr.wpColorWarningDark
     ),
-    BUTTON_SHOW_MOVE_TRASHED_POST_TO_DRAFT_DIALOG(15, 0, 0, 0);
+    BUTTON_SHOW_MOVE_TRASHED_POST_TO_DRAFT_DIALOG(15, 0, 0, 0),
+    BUTTON_COPY(16, R.string.button_copy, R.drawable.ic_copy_white_24dp, R.attr.colorOnSurface);
 
     companion object {
         fun fromInt(value: Int): PostListButtonType? = values().firstOrNull { it.value == value }

WordPress/src/main/res/values/strings.xml

@@ -302,6 +302,7 @@
     <string name="button_discard">Discard</string>
     <string name="button_retry">Retry</string>
     <string name="button_move_to_draft">Move to Draft</string>
+    <string name="button_copy">Duplicate</string>
 
     <!-- post uploads -->
     <string name="upload_failed_param">Upload failed for \"%s\"</string>
@@ -373,6 +374,12 @@
     <string name="dialog_confirm_autosave_restore_button">The version from another device</string>
     <string name="dialog_confirm_autosave_dont_restore_button">The version from this app</string>
 
+    <!-- post confirm copy local post dialog -->
+    <string name="dialog_confirm_copy_local_title">Post sync conflict</string>
+    <string name="dialog_confirm_copy_local_message">The post you are trying to copy has two versions that are in conflict or you recently made changes but didn\'t save them.\nEdit the post first to resolve any conflict or proceed with copying the version from this app.</string>
+    <string name="dialog_confirm_copy_local_edit_button">Edit the post first</string>
+    <string name="dialog_confirm_copy_local_copy_button">Copy the version from this app</string>
+
     <!-- trash post with local changes dialog -->
     <string name="dialog_confirm_trash_losing_local_changes_title">Local changes</string>
     <string name="dialog_confirm_trash_losing_local_changes_message">Trashing this post will also discard local changes, are you sure you want to continue?</string>