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-rw-r--r--app/assets/javascripts/components/actions/compose.jsx4
-rw-r--r--app/assets/javascripts/components/reducers/compose.jsx33
-rw-r--r--app/assets/javascripts/components/uuid.jsx3
-rw-r--r--app/controllers/api/v1/statuses_controller.rb15
-rw-r--r--app/services/post_status_service.rb14
-rw-r--r--config/locales/simple_form.fa.yml2
-rw-r--r--spec/services/post_status_service_spec.rb9
7 files changed, 67 insertions, 13 deletions
diff --git a/app/assets/javascripts/components/actions/compose.jsx b/app/assets/javascripts/components/actions/compose.jsx
index de75ddabe..d7ff6ea63 100644
--- a/app/assets/javascripts/components/actions/compose.jsx
+++ b/app/assets/javascripts/components/actions/compose.jsx
@@ -85,6 +85,10 @@ export function submitCompose() {
       sensitive: getState().getIn(['compose', 'sensitive']),
       spoiler_text: getState().getIn(['compose', 'spoiler_text'], ''),
       visibility: getState().getIn(['compose', 'privacy'])
+    }, {
+      headers: {
+        'Idempotency-Key': getState().getIn(['compose', 'idempotencyKey'])
+      }
     }).then(function (response) {
       dispatch(submitComposeSuccess({ ...response.data }));
 
diff --git a/app/assets/javascripts/components/reducers/compose.jsx b/app/assets/javascripts/components/reducers/compose.jsx
index a411feedd..c87384780 100644
--- a/app/assets/javascripts/components/reducers/compose.jsx
+++ b/app/assets/javascripts/components/reducers/compose.jsx
@@ -26,6 +26,7 @@ import {
 import { TIMELINE_DELETE } from '../actions/timelines';
 import { STORE_HYDRATE } from '../actions/store';
 import Immutable from 'immutable';
+import uuid from '../uuid';
 
 const initialState = Immutable.Map({
   mounted: false,
@@ -45,7 +46,8 @@ const initialState = Immutable.Map({
   suggestions: Immutable.List(),
   me: null,
   default_privacy: 'public',
-  resetFileKey: Math.floor((Math.random() * 0x10000))
+  resetFileKey: Math.floor((Math.random() * 0x10000)),
+  idempotencyKey: null
 });
 
 function statusToTextMentions(state, status) {
@@ -69,6 +71,7 @@ function clearAll(state) {
     map.set('privacy', state.get('default_privacy'));
     map.set('sensitive', false);
     map.update('media_attachments', list => list.clear());
+    map.set('idempotencyKey', uuid());
   });
 };
 
@@ -79,6 +82,7 @@ function appendMedia(state, media) {
     map.set('resetFileKey', Math.floor((Math.random() * 0x10000)));
     map.update('text', oldText => `${oldText.trim()} ${media.get('text_url')}`);
     map.set('focusDate', new Date());
+    map.set('idempotencyKey', uuid());
   });
 };
 
@@ -89,6 +93,7 @@ function removeMedia(state, mediaId) {
   return state.withMutations(map => {
     map.update('media_attachments', list => list.filterNot(item => item.get('id') === mediaId));
     map.update('text', text => text.replace(media.get('text_url'), '').trim());
+    map.set('idempotencyKey', uuid());
 
     if (prevSize === 1) {
       map.set('sensitive', false);
@@ -102,6 +107,7 @@ const insertSuggestion = (state, position, token, completion) => {
     map.set('suggestion_token', null);
     map.update('suggestions', Immutable.List(), list => list.clear());
     map.set('focusDate', new Date());
+    map.set('idempotencyKey', uuid());
   });
 };
 
@@ -111,6 +117,7 @@ const insertEmoji = (state, position, emojiData) => {
   return state.withMutations(map => {
     map.update('text', oldText => `${oldText.slice(0, position)}${emoji} ${oldText.slice(position)}`);
     map.set('focusDate', new Date());
+    map.set('idempotencyKey', uuid());
   });
 };
 
@@ -135,18 +142,27 @@ export default function compose(state = initialState, action) {
   case COMPOSE_UNMOUNT:
     return state.set('mounted', false);
   case COMPOSE_SENSITIVITY_CHANGE:
-    return state.set('sensitive', !state.get('sensitive'));
+    return state
+      .set('sensitive', !state.get('sensitive'))
+      .set('idempotencyKey', uuid());
   case COMPOSE_SPOILERNESS_CHANGE:
     return state.withMutations(map => {
       map.set('spoiler_text', '');
       map.set('spoiler', !state.get('spoiler'));
+      map.set('idempotencyKey', uuid());
     });
   case COMPOSE_SPOILER_TEXT_CHANGE:
-    return state.set('spoiler_text', action.text);
+    return state
+      .set('spoiler_text', action.text)
+      .set('idempotencyKey', uuid());
   case COMPOSE_VISIBILITY_CHANGE:
-    return state.set('privacy', action.value);
+    return state
+      .set('privacy', action.value)
+      .set('idempotencyKey', uuid());
   case COMPOSE_CHANGE:
-    return state.set('text', action.text);
+    return state
+      .set('text', action.text)
+      .set('idempotencyKey', uuid());
   case COMPOSE_REPLY:
     return state.withMutations(map => {
       map.set('in_reply_to', action.status.get('id'));
@@ -154,6 +170,7 @@ export default function compose(state = initialState, action) {
       map.set('privacy', privacyPreference(action.status.get('visibility'), state.get('default_privacy')));
       map.set('focusDate', new Date());
       map.set('preselectDate', new Date());
+      map.set('idempotencyKey', uuid());
 
       if (action.status.get('spoiler_text').length > 0) {
         map.set('spoiler', true);
@@ -170,6 +187,7 @@ export default function compose(state = initialState, action) {
       map.set('spoiler', false);
       map.set('spoiler_text', '');
       map.set('privacy', state.get('default_privacy'));
+      map.set('idempotencyKey', uuid());
     });
   case COMPOSE_SUBMIT_REQUEST:
     return state.set('is_submitting', true);
@@ -190,7 +208,10 @@ export default function compose(state = initialState, action) {
   case COMPOSE_UPLOAD_PROGRESS:
     return state.set('progress', Math.round((action.loaded / action.total) * 100));
   case COMPOSE_MENTION:
-    return state.update('text', text => `${text}@${action.account.get('acct')} `).set('focusDate', new Date());
+    return state
+      .update('text', text => `${text}@${action.account.get('acct')} `)
+      .set('focusDate', new Date())
+      .set('idempotencyKey', uuid());
   case COMPOSE_SUGGESTIONS_CLEAR:
     return state.update('suggestions', Immutable.List(), list => list.clear()).set('suggestion_token', null);
   case COMPOSE_SUGGESTIONS_READY:
diff --git a/app/assets/javascripts/components/uuid.jsx b/app/assets/javascripts/components/uuid.jsx
new file mode 100644
index 000000000..be1899305
--- /dev/null
+++ b/app/assets/javascripts/components/uuid.jsx
@@ -0,0 +1,3 @@
+export default function uuid(a) {
+  return a ? (a^Math.random() * 16 >> a / 4).toString(16) : ([1e7]+-1e3+-4e3+-8e3+-1e11).replace(/[018]/g, uuid);
+};
diff --git a/app/controllers/api/v1/statuses_controller.rb b/app/controllers/api/v1/statuses_controller.rb
index 5a2e18cc0..77bdaa494 100644
--- a/app/controllers/api/v1/statuses_controller.rb
+++ b/app/controllers/api/v1/statuses_controller.rb
@@ -57,11 +57,16 @@ class Api::V1::StatusesController < ApiController
   end
 
   def create
-    @status = PostStatusService.new.call(current_user.account, status_params[:status], status_params[:in_reply_to_id].blank? ? nil : Status.find(status_params[:in_reply_to_id]), media_ids: status_params[:media_ids],
-                                                                                                                                                                                  sensitive: status_params[:sensitive],
-                                                                                                                                                                                  spoiler_text: status_params[:spoiler_text],
-                                                                                                                                                                                  visibility: status_params[:visibility],
-                                                                                                                                                                                  application: doorkeeper_token.application)
+    @status = PostStatusService.new.call(current_user.account,
+                                         status_params[:status],
+                                         status_params[:in_reply_to_id].blank? ? nil : Status.find(status_params[:in_reply_to_id]),
+                                         media_ids: status_params[:media_ids],
+                                         sensitive: status_params[:sensitive],
+                                         spoiler_text: status_params[:spoiler_text],
+                                         visibility: status_params[:visibility],
+                                         application: doorkeeper_token.application,
+                                         idempotency: request.headers['Idempotency-Key'])
+
     render :show
   end
 
diff --git a/app/services/post_status_service.rb b/app/services/post_status_service.rb
index 6ce434a13..958cc2890 100644
--- a/app/services/post_status_service.rb
+++ b/app/services/post_status_service.rb
@@ -11,8 +11,14 @@ class PostStatusService < BaseService
   # @option [String] :spoiler_text
   # @option [Enumerable] :media_ids Optional array of media IDs to attach
   # @option [Doorkeeper::Application] :application
+  # @option [String] :idempotency Optional idempotency key
   # @return [Status]
   def call(account, text, in_reply_to = nil, options = {})
+    if options[:idempotency].present?
+      existing_id = redis.get("idempotency:status:#{account.id}:#{options[:idempotency]}")
+      return Status.find(existing_id) if existing_id
+    end
+
     media  = validate_media!(options[:media_ids])
     status = account.statuses.create!(text: text,
                                       thread: in_reply_to,
@@ -30,6 +36,10 @@ class PostStatusService < BaseService
     DistributionWorker.perform_async(status.id)
     Pubsubhubbub::DistributionWorker.perform_async(status.stream_entry.id)
 
+    if options[:idempotency].present?
+      redis.setex("idempotency:status:#{account.id}:#{options[:idempotency]}", 3_600, status.id)
+    end
+
     status
   end
 
@@ -63,4 +73,8 @@ class PostStatusService < BaseService
   def process_hashtags_service
     @process_hashtags_service ||= ProcessHashtagsService.new
   end
+
+  def redis
+    Redis.current
+  end
 end
diff --git a/config/locales/simple_form.fa.yml b/config/locales/simple_form.fa.yml
index 9ff40a120..d026a3b25 100644
--- a/config/locales/simple_form.fa.yml
+++ b/config/locales/simple_form.fa.yml
@@ -35,7 +35,7 @@ fa:
         type: نوع درون‌ریزی
         username: نام کاربری
       interactions:
-        must_be_follower: مسدودکردن اعلان‌های همه به جز پیگیران 
+        must_be_follower: مسدودکردن اعلان‌های همه به جز پیگیران
         must_be_following: مسدودکردن اعلان‌های کسانی که شما پی نمی‌گیرید
       notification_emails:
         digest: خلاصه‌کردن چند اعلان در یک ایمیل
diff --git a/spec/services/post_status_service_spec.rb b/spec/services/post_status_service_spec.rb
index c9d80257f..57876dcc2 100644
--- a/spec/services/post_status_service_spec.rb
+++ b/spec/services/post_status_service_spec.rb
@@ -176,7 +176,14 @@ RSpec.describe PostStatusService do
     )
   end
 
+  it 'returns existing status when used twice with idempotency key' do
+    account = Fabricate(:account)
+    status1 = subject.call(account, 'test', nil, idempotency: 'meepmeep')
+    status2 = subject.call(account, 'test', nil, idempotency: 'meepmeep')
+    expect(status2.id).to eq status1.id
+  end
+
   def create_status_with_options(options = {})
-    subject.call(Fabricate(:account), "test", nil, options)
+    subject.call(Fabricate(:account), 'test', nil, options)
   end
 end