FIX: keep files in order when adding multiple uploads (#6306)

* FIX: keep files in order when adding multiple uploads

* use filename in the placeholder when uploading files

* add tests

* add consecutive nr to the placeholder when multiple uploads with the same filename

app/assets/javascripts/discourse/components/composer-editor.js.es6

@@ -53,10 +53,15 @@ export default Ember.Component.extend({
   _xhr: null,
   shouldBuildScrollMap: true,
   scrollMap: null,
+  uploadFilenamePlaceholder: null,
 
-  @computed
+  @computed("uploadFilenamePlaceholder")
-  uploadPlaceholder() {
+  uploadPlaceholder(uploadFilenamePlaceholder) {
-    return `[${I18n.t("uploading")}]() `;
+    const clipboard = I18n.t("clipboard");
+    const filename = uploadFilenamePlaceholder
+      ? uploadFilenamePlaceholder
+      : clipboard;
+    return `[${I18n.t("uploading_filename", { filename })}]() `;
   },
 
   @computed("composer.requiredCategoryMissing")
@@ -218,6 +223,53 @@ export default Ember.Component.extend({
     }
   },
 
+  _setUploadPlaceholderSend(data) {
+    const filename = this._filenamePlaceholder(data);
+    this.set("uploadFilenamePlaceholder", filename);
+
+    // when adding two separate files with the same filename search for matching
+    // placeholder already existing in the editor ie [Uploading: test.png...]
+    // and add order nr to the next one: [Uplodading: test.png(1)...]
+    const regexString = `\\[${I18n.t("uploading_filename", {
+      filename: filename + "(?:\\()?([0-9])?(?:\\))?"
+    })}\\]\\(\\)`;
+    const globalRegex = new RegExp(regexString, "g");
+    const matchingPlaceholder = this.get("composer.reply").match(globalRegex);
+    if (matchingPlaceholder) {
+      // get last matching placeholder and its consecutive nr in regex
+      // capturing group and apply +1 to the placeholder
+      const lastMatch = matchingPlaceholder[matchingPlaceholder.length - 1];
+      const regex = new RegExp(regexString);
+      const orderNr = regex.exec(lastMatch)[1]
+        ? parseInt(regex.exec(lastMatch)[1]) + 1
+        : 1;
+      data.orderNr = orderNr;
+      const filenameWithOrderNr = `${filename}(${orderNr})`;
+      this.set("uploadFilenamePlaceholder", filenameWithOrderNr);
+    }
+  },
+
+  _setUploadPlaceholderDone(data) {
+    const filename = this._filenamePlaceholder(data);
+    const filenameWithSize = `${filename} (${data.total})`;
+    this.set("uploadFilenamePlaceholder", filenameWithSize);
+
+    if (data.orderNr) {
+      const filenameWithOrderNr = `${filename}(${data.orderNr})`;
+      this.set("uploadFilenamePlaceholder", filenameWithOrderNr);
+    } else {
+      this.set("uploadFilenamePlaceholder", filename);
+    }
+  },
+
+  _filenamePlaceholder(data) {
+    return data.files[0].name.replace(/\u200B-\u200D\uFEFF]/g, "");
+  },
+
+  _resetUploadFilenamePlaceholder() {
+    this.set("uploadFilenamePlaceholder", null);
+  },
+
   _enableAdvancedEditorPreviewSync() {
     return this.siteSettings.enable_advanced_editor_preview_sync;
   },
@@ -542,6 +594,7 @@ export default Ember.Component.extend({
   },
 
   _resetUpload(removePlaceholder) {
+    Ember.run.next(() => {
       if (this._validUploads > 0) {
         this._validUploads--;
       }
@@ -559,6 +612,8 @@ export default Ember.Component.extend({
           ""
         );
       }
+      this._resetUploadFilenamePlaceholder();
+    });
   },
 
   _bindUploadTarget() {
@@ -568,7 +623,6 @@ export default Ember.Component.extend({
 
     const $element = this.$();
     const csrf = this.session.get("csrfToken");
-    const uploadPlaceholder = this.get("uploadPlaceholder");
 
     $element.fileupload({
       url: Discourse.getURL(
@@ -637,7 +691,13 @@ export default Ember.Component.extend({
     $element.on("fileuploadsend", (e, data) => {
       this._pasted = false;
       this._validUploads++;
-      this.appEvents.trigger("composer:insert-text", uploadPlaceholder);
+
+      this._setUploadPlaceholderSend(data);
+
+      this.appEvents.trigger(
+        "composer:insert-text",
+        this.get("uploadPlaceholder")
+      );
 
       if (data.xhr && data.originalFiles.length === 1) {
         this.set("isCancellable", true);
@@ -647,13 +707,13 @@ export default Ember.Component.extend({
 
     $element.on("fileuploaddone", (e, data) => {
       let upload = data.result;
-
+      this._setUploadPlaceholderDone(data);
       if (!this._xhr || !this._xhr._userCancelled) {
         const markdown = getUploadMarkdown(upload);
         cacheShortUploadUrl(upload.short_url, upload.url);
         this.appEvents.trigger(
           "composer:replace-text",
-          uploadPlaceholder.trim(),
+          this.get("uploadPlaceholder").trim(),
           markdown
         );
         this._resetUpload(false);
@@ -663,6 +723,7 @@ export default Ember.Component.extend({
     });
 
     $element.on("fileuploadfail", (e, data) => {
+      this._setUploadPlaceholderDone(data);
       this._resetUpload(true);
 
       const userCancelled = this._xhr && this._xhr._userCancelled;

config/locales/client.en.yml

@@ -317,7 +317,8 @@ en:
 
     upload: "Upload"
     uploading: "Uploading..."
-    uploading_filename: "Uploading {{filename}}..."
+    uploading_filename: "Uploading: {{filename}}..."
+    clipboard: "clipboard"
     uploaded: "Uploaded!"
 
     pasting: "Pasting..."

test/javascripts/acceptance/composer-test.js.es6

@@ -89,6 +89,80 @@ QUnit.test("Tests the Composer controls", async assert => {
   assert.ok(!exists(".bootbox.modal"), "the confirmation can be cancelled");
 });
 
+QUnit.test("Composer upload placeholder", async assert => {
+  await visit("/");
+  await click("#create-topic");
+
+  const file1 = new Blob([""], { type: "image/png" });
+  file1.name = "test.png";
+  const data1 = {
+    files: [file1],
+    result: {
+      original_filename: "test.png",
+      thumbnail_width: 200,
+      thumbnail_height: 300,
+      url: "/uploads/test1.ext"
+    }
+  };
+
+  const file2 = new Blob([""], { type: "image/png" });
+  file2.name = "test.png";
+  const data2 = {
+    files: [file2],
+    result: {
+      original_filename: "test.png",
+      thumbnail_width: 100,
+      thumbnail_height: 200,
+      url: "/uploads/test2.ext"
+    }
+  };
+
+  const file3 = new Blob([""], { type: "image/png" });
+  file3.name = "image.png";
+  const data3 = {
+    files: [file3],
+    result: {
+      original_filename: "image.png",
+      thumbnail_width: 300,
+      thumbnail_height: 400,
+      url: "/uploads/test3.ext"
+    }
+  };
+
+  await find(".wmd-controls").trigger("fileuploadsend", data1);
+  assert.equal(find(".d-editor-input").val(), "[Uploading: test.png...]() ");
+
+  await find(".wmd-controls").trigger("fileuploadsend", data2);
+  assert.equal(
+    find(".d-editor-input").val(),
+    "[Uploading: test.png...]() [Uploading: test.png(1)...]() "
+  );
+
+  await find(".wmd-controls").trigger("fileuploadsend", data3);
+  assert.equal(
+    find(".d-editor-input").val(),
+    "[Uploading: test.png...]() [Uploading: test.png(1)...]() [Uploading: image.png...]() "
+  );
+
+  await find(".wmd-controls").trigger("fileuploaddone", data2);
+  assert.equal(
+    find(".d-editor-input").val(),
+    "[Uploading: test.png...]() ![test|100x200](/uploads/test2.ext) [Uploading: image.png...]() "
+  );
+
+  await find(".wmd-controls").trigger("fileuploaddone", data3);
+  assert.equal(
+    find(".d-editor-input").val(),
+    "[Uploading: test.png...]() ![test|100x200](/uploads/test2.ext) ![image|300x400](/uploads/test3.ext) "
+  );
+
+  await find(".wmd-controls").trigger("fileuploaddone", data1);
+  assert.equal(
+    find(".d-editor-input").val(),
+    "![test|200x300](/uploads/test1.ext) ![test|100x200](/uploads/test2.ext) ![image|300x400](/uploads/test3.ext) "
+  );
+});
+
 QUnit.test("Create a topic with server side errors", async assert => {
   await visit("/");
   await click("#create-topic");