From 85f3bc1ab39bb4244e910de24eac8415c0d66207 Mon Sep 17 00:00:00 2001
From: Thibaut Girka <thib@sitedethib.com>
Date: Fri, 12 Jul 2019 18:53:40 +0200
Subject: [PATCH] Implement feature to add filtered phrases to content warnings

---
 .../flavours/glitch/components/status.js      | 12 +++++------
 .../flavours/glitch/selectors/index.js        | 21 ++++++++++++++++++-
 2 files changed, 26 insertions(+), 7 deletions(-)

diff --git a/app/javascript/flavours/glitch/components/status.js b/app/javascript/flavours/glitch/components/status.js
index c8d0dacb0f1..4cd6b3a3601 100644
--- a/app/javascript/flavours/glitch/components/status.js
+++ b/app/javascript/flavours/glitch/components/status.js
@@ -106,7 +106,7 @@ class Status extends ImmutablePureComponent {
     statusId: undefined,
     revealBehindCW: undefined,
     showCard: false,
-    bypassFilter: false,
+    forceFilter: undefined,
   }
 
   // Avoid checking props that are functions (and whose equality will always
@@ -127,7 +127,7 @@ class Status extends ImmutablePureComponent {
     'isExpanded',
     'isCollapsed',
     'showMedia',
-    'bypassFilter',
+    'forceFilter',
   ]
 
   //  If our settings have changed to disable collapsed statuses, then we
@@ -431,11 +431,11 @@ class Status extends ImmutablePureComponent {
 
   handleUnfilterClick = e => {
     const { onUnfilter, status } = this.props;
-    onUnfilter(status.get('reblog') ? status.get('reblog') : status, () => this.setState({ bypassFilter: true }));
+    onUnfilter(status.get('reblog') ? status.get('reblog') : status, () => this.setState({ forceFilter: false }));
   }
 
   handleFilterClick = () => {
-    this.setState({ bypassFilter: false });
+    this.setState({ forceFilter: true });
   }
 
   handleRef = c => {
@@ -496,7 +496,7 @@ class Status extends ImmutablePureComponent {
       );
     }
 
-    if ((status.get('filtered') || status.getIn(['reblog', 'filtered'])) && !this.state.bypassFilter) {
+    if ((status.get('filtered') || status.getIn(['reblog', 'filtered'])) && (this.state.forceFilter === true || settings.get('filtering_behavior') !== 'content_warning')) {
       const minHandlers = this.props.muted ? {} : {
         moveUp: this.handleHotkeyMoveUp,
         moveDown: this.handleHotkeyMoveDown,
@@ -506,7 +506,7 @@ class Status extends ImmutablePureComponent {
         <HotKeys handlers={minHandlers}>
           <div className='status__wrapper status__wrapper--filtered focusable' tabIndex='0' ref={this.handleRef}>
             <FormattedMessage id='status.filtered' defaultMessage='Filtered' />
-            {settings.get('filtering_behavior') === 'hide' && (
+            {settings.get('filtering_behavior') !== 'upstream' && (
               <button className='status__wrapper--filtered__button' onClick={this.handleUnfilterClick}>
                 <FormattedMessage id='status.show_filter_reason' defaultMessage='Show why' />
               </button>
diff --git a/app/javascript/flavours/glitch/selectors/index.js b/app/javascript/flavours/glitch/selectors/index.js
index 551a3ae3176..b414cd5e5f7 100644
--- a/app/javascript/flavours/glitch/selectors/index.js
+++ b/app/javascript/flavours/glitch/selectors/index.js
@@ -1,3 +1,4 @@
+import escapeTextContentForBrowser from 'escape-html';
 import { createSelector } from 'reselect';
 import { List as ImmutableList, is } from 'immutable';
 import { me } from 'flavours/glitch/util/initial_state';
@@ -90,10 +91,12 @@ export const makeGetStatus = () => {
       (state, { id }) => state.getIn(['accounts', state.getIn(['statuses', id, 'account'])]),
       (state, { id }) => state.getIn(['accounts', state.getIn(['statuses', state.getIn(['statuses', id, 'reblog']), 'account'])]),
       (state, _) => state.getIn(['local_settings', 'filtering_behavior']),
+      (state, _) => state.get('filters', ImmutableList()),
+      (_, { contextType }) => contextType,
       getFiltersRegex,
     ],
 
-    (statusBase, statusReblog, accountBase, accountReblog, filteringBehavior, filtersRegex) => {
+    (statusBase, statusReblog, accountBase, accountReblog, filteringBehavior, filters, contextType, filtersRegex) => {
       if (!statusBase) {
         return null;
       }
@@ -119,6 +122,22 @@ export const makeGetStatus = () => {
 
       if (filtered && filteringBehavior === 'drop') {
         return null;
+      } else if (filtered && filteringBehavior === 'content_warning') {
+        let spoilerText = (statusReblog || statusBase).get('spoiler_text', '');
+        const searchIndex = (statusReblog || statusBase).get('search_index');
+        const serverSideType = toServerSideType(contextType);
+        const enabledFilters = filters.filter(filter => filter.get('context').includes(serverSideType) && (filter.get('expires_at') === null || Date.parse(filter.get('expires_at')) > (new Date()))).toArray();
+        const matchingFilters = enabledFilters.filter(filter => {
+          const regexp = regexFromFilters([filter]);
+          return regexp.test(searchIndex) && !regexp.test(spoilerText);
+        });
+        if (statusReblog) {
+          statusReblog = statusReblog.set('spoiler_text', matchingFilters.map(filter => filter.get('phrase')).concat([spoilerText]).filter(cw => !!cw).join(', '));
+          statusReblog = statusReblog.update('spoilerHtml', '', spoilerText => matchingFilters.map(filter => escapeTextContentForBrowser(filter.get('phrase'))).concat([spoilerText]).filter(cw => !!cw).join(', '));
+        } else {
+          statusBase = statusBase.set('spoiler_text', matchingFilters.map(filter => filter.get('phrase')).concat([spoilerText]).filter(cw => !!cw).join(', '));
+          statusBase = statusBase.update('spoilerHtml', '', spoilerText => matchingFilters.map(filter => escapeTextContentForBrowser(filter.get('phrase'))).concat([spoilerText]).filter(cw => !!cw).join(', '));
+        }
       }
 
       return statusBase.withMutations(map => {