From bcd7da510da3f0b5d2ad812d1d1b9b10b6a34741 Mon Sep 17 00:00:00 2001
From: khawerrind <khawer.zeshan@gmail.com>
Date: Thu, 19 Jan 2017 02:02:03 +0500
Subject: PLT-5057 Make image preview work if URL contains a query (#4869)

* Fixed image previews urls having query params

* dont show expand/collapse icon if image link fails to load
---
 .../components/post_body_additional_content.jsx    | 29 +++++++++++++++-------
 .../components/post_view/components/post_image.jsx |  6 ++++-
 2 files changed, 25 insertions(+), 10 deletions(-)

diff --git a/webapp/components/post_view/components/post_body_additional_content.jsx b/webapp/components/post_view/components/post_body_additional_content.jsx
index a65b608d7..e6c1f3b06 100644
--- a/webapp/components/post_view/components/post_body_additional_content.jsx
+++ b/webapp/components/post_view/components/post_body_additional_content.jsx
@@ -22,17 +22,20 @@ export default class PostBodyAdditionalContent extends React.Component {
         this.generateStaticEmbed = this.generateStaticEmbed.bind(this);
         this.toggleEmbedVisibility = this.toggleEmbedVisibility.bind(this);
         this.isLinkToggleable = this.isLinkToggleable.bind(this);
+        this.handleLinkLoadError = this.handleLinkLoadError.bind(this);
 
         this.state = {
             embedVisible: props.previewCollapsed.startsWith('false'),
-            link: Utils.extractFirstLink(props.post.message)
+            link: Utils.extractFirstLink(props.post.message),
+            linkLoadError: false
         };
     }
 
     componentWillReceiveProps(nextProps) {
         this.setState({
             embedVisible: nextProps.previewCollapsed.startsWith('false'),
-            link: Utils.extractFirstLink(nextProps.post.message)
+            link: Utils.extractFirstLink(nextProps.post.message),
+            linkLoadError: false
         });
     }
 
@@ -46,6 +49,9 @@ export default class PostBodyAdditionalContent extends React.Component {
         if (nextState.embedVisible !== this.state.embedVisible) {
             return true;
         }
+        if (nextState.linkLoadError !== this.state.linkLoadError) {
+            return true;
+        }
         return false;
     }
 
@@ -79,12 +85,10 @@ export default class PostBodyAdditionalContent extends React.Component {
     }
 
     isLinkImage(link) {
-        for (let i = 0; i < Constants.IMAGE_TYPES.length; i++) {
-            const imageType = Constants.IMAGE_TYPES[i];
-            const suffix = link.substring(link.length - (imageType.length + 1));
-            if (suffix === '.' + imageType || suffix === '=' + imageType) {
-                return true;
-            }
+        const regex = /.+\/(.+\.(?:jpg|gif|bmp|png|jpeg))(?:\?.*)?$/i;
+        const match = link.match(regex);
+        if (match && match[1]) {
+            return true;
         }
 
         return false;
@@ -107,6 +111,12 @@ export default class PostBodyAdditionalContent extends React.Component {
         return false;
     }
 
+    handleLinkLoadError() {
+        this.setState({
+            linkLoadError: true
+        });
+    }
+
     generateToggleableEmbed() {
         const link = this.state.link;
         if (!link) {
@@ -128,6 +138,7 @@ export default class PostBodyAdditionalContent extends React.Component {
                 <PostImage
                     channelId={this.props.post.channel_id}
                     link={link}
+                    onLinkLoadError={this.handleLinkLoadError}
                 />
             );
         }
@@ -173,7 +184,7 @@ export default class PostBodyAdditionalContent extends React.Component {
             );
         }
 
-        if (this.isLinkToggleable()) {
+        if (this.isLinkToggleable() && !this.state.linkLoadError) {
             const messageWithToggle = [];
 
             // if message has only one line and starts with a link place toggle in this only line
diff --git a/webapp/components/post_view/components/post_image.jsx b/webapp/components/post_view/components/post_image.jsx
index d1d1a6c7a..9a761bfca 100644
--- a/webapp/components/post_view/components/post_image.jsx
+++ b/webapp/components/post_view/components/post_image.jsx
@@ -53,6 +53,9 @@ export default class PostImageEmbed extends React.Component {
             errored: true,
             loaded: true
         });
+        if (this.props.onLinkLoadError) {
+            this.props.onLinkLoadError();
+        }
     }
 
     render() {
@@ -79,5 +82,6 @@ export default class PostImageEmbed extends React.Component {
 }
 
 PostImageEmbed.propTypes = {
-    link: React.PropTypes.string.isRequired
+    link: React.PropTypes.string.isRequired,
+    onLinkLoadError: React.PropTypes.func
 };
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