Can edit settings on the embedding page

app/assets/javascripts/admin/components/embedding-setting.js.es6

@@ -0,0 +1,23 @@
+import computed from 'ember-addons/ember-computed-decorators';
+
+export default Ember.Component.extend({
+  classNames: ['embed-setting'],
+
+  @computed('field')
+  inputId(field) { return field.dasherize(); },
+
+  @computed('field')
+  translationKey(field) { return `admin.embedding.${field}`; },
+
+  @computed('type')
+  isCheckbox(type) { return type === "checkbox"; },
+
+  @computed('value')
+  checked: {
+    get(value) { return !!value; },
+    set(value) {
+      this.set('value', value); 
+      return value;
+    }
+  }
+});

app/assets/javascripts/admin/components/highlighted-code.js.es6

@@ -0,0 +1,12 @@
+import { on, observes } from 'ember-addons/ember-computed-decorators';
+import highlightSyntax from 'discourse/lib/highlight-syntax';
+
+export default Ember.Component.extend({
+
+  @on('didInsertElement')
+  @observes('code')
+  _refresh: function() {
+    highlightSyntax(this.$());
+  }
+
+});

app/assets/javascripts/admin/controllers/admin-embedding.js.es6

@@ -1,9 +1,46 @@
+import computed from 'ember-addons/ember-computed-decorators';
+import { popupAjaxError } from 'discourse/lib/ajax-error';
+
 export default Ember.Controller.extend({
+  saved: false,
   embedding: null,
 
+  // show settings if we have at least one created host
+  @computed('embedding.embeddable_hosts.@each.isCreated')
+  showSecondary() {
+    const hosts = this.get('embedding.embeddable_hosts');
+    return hosts.length && hosts.findProperty('isCreated');
+  },
+
+  @computed('embedding.base_url')
+  embeddingCode(baseUrl) {
+
+    const html =
+`<div id='discourse-comments'></div>
+
+<script type="text/javascript">
+  DiscourseEmbed = { discourseUrl: '${baseUrl}/',
+                     discourseEmbedUrl: 'REPLACE_ME' };
+
+  (function() {
+    var d = document.createElement('script'); d.type = 'text/javascript'; d.async = true;
+    d.src = DiscourseEmbed.discourseUrl + 'javascripts/embed.js';
+    (document.getElementsByTagName('head')[0] || document.getElementsByTagName('body')[0]).appendChild(d);
+  })();
+</script>`;
+
+    return html;
+  },
+
   actions: {
     saveChanges() {
-      this.get('embedding').update({});
+      const embedding = this.get('embedding');
+      const updates = embedding.getProperties(embedding.get('fields'));
+
+      this.set('saved', false);
+      this.get('embedding').update(updates).then(() => {
+        this.set('saved', true);
+      }).catch(popupAjaxError);
     },
 
     addHost() {

app/assets/javascripts/admin/templates/components/embedding-setting.hbs

@@ -0,0 +1,11 @@
+{{#if isCheckbox}}
+  <label for={{inputId}}>
+    {{input checked=checked id=inputId type="checkbox"}}
+    {{i18n translationKey}}
+  </label>
+{{else}}
+  <label for={{inputId}}>{{i18n translationKey}}</label>
+  {{input value=value id=inputId}}
+{{/if}}
+
+<div class='clearfix'></div>

app/assets/javascripts/admin/templates/components/highlighted-code.hbs

@@ -0,0 +1 @@
+<pre><code class={{lang}}>{{code}}</code></pre>

app/assets/javascripts/admin/templates/embedding.hbs

@@ -1,5 +1,6 @@
+<div class='embeddable-hosts'>
   {{#if embedding.embeddable_hosts}}
-  <table>
+    <table class='embedding'>
       <tr>
         <th style='width: 50%'>{{i18n "admin.embedding.host"}}</th>
         <th style='width: 30%'>{{i18n "admin.embedding.category"}}</th>
@@ -9,7 +10,52 @@
         {{embeddable-host host=host deleteHost="deleteHost"}}
       {{/each}}
     </table>
+  {{else}}
+    <p>{{i18n "admin.embedding.get_started"}}</p>
   {{/if}}
 
-{{d-button label="admin.embedding.add_host" action="addHost" icon="plus" class="btn-primary"}}
+  {{d-button label="admin.embedding.add_host" action="addHost" icon="plus" class="btn-primary add-host"}}
+</div>
 
+{{#if showSecondary}}
+  <div class='embedding-secondary'>
+    <p>{{{i18n "admin.embedding.sample"}}}</p>
+    {{highlighted-code code=embeddingCode lang="html"}}
+  </div>
+
+  <hr>
+
+  <div class='embedding-secondary'>
+    <h3>{{i18n "admin.embedding.settings"}}</h3>
+
+    {{embedding-setting field="embed_by_username" value=embedding.embed_by_username}}
+    {{embedding-setting field="embed_post_limit" value=embedding.embed_post_limit}}
+    {{embedding-setting field="embed_truncate" value=embedding.embed_truncate type="checkbox"}}
+  </div>
+
+  <div class='embedding-secondary'>
+    <h3>{{i18n "admin.embedding.feed_settings"}}</h3>
+    <p class="description">{{i18n "admin.embedding.feed_description"}}</p>
+
+    {{embedding-setting field="feed_polling_enabled" value=embedding.feed_polling_enabled type="checkbox"}}
+    {{embedding-setting field="feed_polling_url" value=embedding.feed_polling_url}}
+    {{embedding-setting field="embed_username_key_from_feed" value=embedding.embed_username_key_from_feed}}
+  </div>
+
+  <div class='embedding-secondary'>
+    <h3>{{i18n "admin.embedding.crawling_settings"}}</h3>
+    <p class="description">{{i18n "admin.embedding.crawling_description"}}</p>
+
+    {{embedding-setting field="embed_whitelist_selector" value=embedding.embed_whitelist_selector}}
+    {{embedding-setting field="embed_blacklist_selector" value=embedding.embed_blacklist_selector}}
+  </div>
+
+  <div class='embedding-secondary'>
+    {{d-button label="admin.embedding.save"
+               action="saveChanges"
+               class="btn-primary embed-save"
+               disabled=embedding.isSaving}}
+
+    {{#if saved}}{{i18n "saved"}}{{/if}}
+  </div>
+{{/if}}

app/assets/stylesheets/common/admin/admin_base.scss

@@ -1648,6 +1648,36 @@ table#user-badges {
   margin-bottom: 10px;
 }
 
+
+// embedding
+
+.embeddable-hosts {
+  table {
+    margin-bottom: 1em;
+  }
+  margin-bottom: 2em;
+}
+
+.embedding-secondary {
+  h3 {
+    margin: 1em 0;
+  }
+  margin-bottom: 2em;
+
+  .embed-setting {
+    input[type=text] {
+      width: 50%;
+    }
+    margin: 0.75em 0;
+  }
+
+  p.description {
+    color: dark-light-choose(scale-color($primary, $lightness: 50%), scale-color($secondary, $lightness: 50%));
+    margin-bottom: 1em;
+    max-width: 700px;
+  }
+}
+
 // Mobile specific styles
 // Mobile view text-inputs need some padding
 .mobile-view .admin-contents {

app/controllers/admin/embedding_controller.rb

@@ -1,3 +1,5 @@
+require_dependency 'embedding'
+
 class Admin::EmbeddingController < Admin::AdminController
 
   before_filter :ensure_logged_in, :ensure_staff, :fetch_embedding
@@ -7,15 +9,21 @@ class Admin::EmbeddingController < Admin::AdminController
   end
 
   def update
+    Embedding.settings.each do |s|
+      @embedding.send("#{s}=", params[:embedding][s])
+    end
+
+    if @embedding.save
+      fetch_embedding
       render_serialized(@embedding, EmbeddingSerializer, root: 'embedding', rest_serializer: true)
+    else
+      render_json_error(@embedding)
+    end
   end
 
   protected
 
     def fetch_embedding
-      @embedding = OpenStruct.new({
-        id: 'default',
-        embeddable_hosts: EmbeddableHost.all.order(:host)
-      })
+      @embedding = Embedding.find
     end
 end

app/models/embedding.rb

@@ -0,0 +1,41 @@
+require 'has_errors'
+
+class Embedding < OpenStruct
+  include HasErrors
+
+  def self.settings
+    %i(embed_by_username
+       embed_post_limit
+       embed_truncate
+       embed_whitelist_selector
+       embed_blacklist_selector
+       feed_polling_enabled
+       feed_polling_url
+       embed_username_key_from_feed)
+  end
+
+  def base_url
+    Discourse.base_url
+  end
+
+  def save
+    Embedding.settings.each do |s|
+      SiteSetting.send("#{s}=", send(s))
+    end
+    true
+  rescue Discourse::InvalidParameters => p
+    errors.add :base, p.to_s
+    false
+  end
+
+  def embeddable_hosts
+    EmbeddableHost.all.order(:host)
+  end
+
+  def self.find
+    embedding_args = { id: 'default' }
+
+    Embedding.settings.each {|s| embedding_args[s] = SiteSetting.send(s) }
+    Embedding.new(embedding_args)
+  end
+end

app/serializers/embedding_serializer.rb

@@ -1,8 +1,14 @@
 class EmbeddingSerializer < ApplicationSerializer
-  attributes :id
+  attributes :id, :fields, :base_url
+  attributes *Embedding.settings
+
   has_many :embeddable_hosts, serializer: EmbeddableHostSerializer, embed: :ids
 
-  def id
-    object.id
+  def fields
+    Embedding.settings
+  end
+
+  def read_attribute_for_serialization(attr)
+    object.respond_to?(attr) ? object.send(attr) : send(attr)
   end
 end

config/locales/client.en.yml

@@ -2492,12 +2492,29 @@ en:
         delete_confirm: "Are you sure you want to delete the :%{name}: emoji?"
 
       embedding:
+        get_started: "If you'd like to embed Discourse on another website, begin by adding its host."
         confirm_delete: "Are you sure you want to delete that host?"
+        sample: "Use the following HTML code into your site to create and embed discourse topics. Replace <b>REPLACE_ME</b> with the canonical URL of the page you are embedding it on."
         title: "Embedding"
         host: "Allowed Hosts"
         edit: "edit"
         category: "Post to Category"
         add_host: "Add Host"
+        settings: "Embedding Settings"
+        feed_settings: "Feed Settings"
+        feed_description: "Providing an RSS/ATOM feed for your site can improve Discourse's ability to import your content."
+        crawling_settings: "Crawler Settings"
+        crawling_description: "When Discourse creates topics for your posts, if no RSS/ATOM feed is present it will attempt to parse your content out of your HTML. Sometimes it can be challenging to extract your content, so we provide the ability to specify CSS rules to make extraction easier."
+
+        embed_by_username: "Username for topic creation"
+        embed_post_limit: "Maximum number of posts to embed"
+        embed_username_key_from_feed: "Key to pull discourse username from feed"
+        embed_truncate: "Truncate the embedded posts"
+        embed_whitelist_selector: "CSS selector for elements that are allowed in embeds"
+        embed_blacklist_selector: "CSS selector for elements that are removed from embeds"
+        feed_polling_enabled: "Import posts via RSS/ATOM"
+        feed_polling_url: "URL of RSS/ATOM feed to crawl"
+        save: "Save Embedding Settings"
 
       permalink:
         title: "Permalinks"

config/site_settings.yml

@@ -759,16 +759,31 @@ developer:
     default: false
 
 embedding:
-  feed_polling_enabled: false
-  feed_polling_url: ''
+  feed_polling_enabled:
+    default: false
+    hidden: true
+  feed_polling_url:
+    default: ''
+    hidden: true
   embed_by_username:
     default: ''
     type: username
-  embed_username_key_from_feed: ''
-  embed_post_limit: 100
-  embed_truncate: false
-  embed_whitelist_selector: ''
-  embed_blacklist_selector: ''
+    hidden: true
+  embed_username_key_from_feed:
+    default: ''
+    hidden: true
+  embed_post_limit:
+    default: 100
+    hidden: true
+  embed_truncate:
+    default: false
+    hidden: true
+  embed_whitelist_selector:
+    default: ''
+    hidden: true
+  embed_blacklist_selector:
+    default: ''
+    hidden: true
 
 legal:
   tos_url: