add global notice for S3 deprecation warning

app/assets/javascripts/discourse/components/global-notice.js.es6

@@ -4,7 +4,7 @@ export default Ember.Component.extend(StringBuffer, {
   rerenderTriggers: ['site.isReadOnly'],
 
   renderString: function(buffer) {
-    var notices = [];
+    let notices = [];
 
     if (this.site.get("isReadOnly")) {
       notices.push([I18n.t("read_only_mode.enabled"), 'alert-read-only']);
@@ -14,8 +14,12 @@ export default Ember.Component.extend(StringBuffer, {
       notices.push([I18n.t("emails_are_disabled"), 'alert-emails-disabled']);
     }
 
+    if (this.siteSettings.enable_s3_uploads) {
+      notices.push([I18n.t("s3_deprecation_warning"), 'alert-s3-deprecation']);
+    }
+
     if (Discourse.User.currentProp('admin') && this.siteSettings.show_create_topics_notice) {
-      var topic_count = 0,
+      let topic_count = 0,
           post_count = 0;
       _.each(this.site.get('categories'), function(c) {
         if (!c.get('read_restricted')) {
@@ -24,7 +28,7 @@ export default Ember.Component.extend(StringBuffer, {
         }
       });
       if (topic_count < 5 || post_count < this.siteSettings.tl1_requires_read_posts) {
-        notices.push([I18n.t("too_few_topics_notice", {posts: this.siteSettings.tl1_requires_read_posts}), 'alert-too-few-topics']);
+        notices.push([I18n.t("too_few_topics_notice", { posts: this.siteSettings.tl1_requires_read_posts }), 'alert-too-few-topics']);
       }
     }
 
@@ -33,9 +37,7 @@ export default Ember.Component.extend(StringBuffer, {
     }
 
     if (notices.length > 0) {
-      buffer.push(_.map(notices, function(arr) {
-        return "<div class='row'><div class='alert alert-info " + arr[1] + "'>" + arr[0] + "</div></div>";
-      }).join(""));
+      buffer.push(_.map(notices, n => "<div class='row'><div class='alert alert-info " + n[1] + "'>" + n[0] + "</div></div>").join(""));
     }
   }
 });

config/locales/client.en.yml

@@ -105,6 +105,8 @@ en:
 
     emails_are_disabled: "All outgoing email has been globally disabled by an administrator. No email notifications of any kind will be sent."
 
+    s3_deprecation_warning: "WARNING! Amazon S3 will soon be deprecated for image/attachment storage. Please, follow the <a href='https://meta.discourse.org/t/warning-amazon-s3-is-deprecated-in-1-3-for-image-attachment-storage/26594'>instructions</a> to migrate to local storage."
+
     edit: 'edit the title and category of this topic'
     not_implemented: "That feature hasn't been implemented yet, sorry!"
     no_value: "No"

config/site_settings.yml

@@ -484,7 +484,9 @@ files:
   prevent_anons_from_downloading_files:
     default: false
     client: true
-  enable_s3_uploads: false
+  enable_s3_uploads:
+    default: false
+    client: true
   s3_use_iam_profile: false
   s3_access_key_id: ''
   s3_secret_access_key: ''