✨ Find favicon in Ghost (#7713)

refs #7688

Adds logic in theme settings api to either serve an uploaded favicon and give it the type `upload` or use the default settings `default`, which will serve the favicon from our shared directory.

TODOs for #7688:
- [X] Figure out, which favicon should be used (uploaded or default) -> this PR
- [ ] Serve and redirect the favicon for any browser requests, incl. redirects
- [ ] Upload favicon via `general/settings` and implement basic admin validations -> [WIP] TryGhost/Ghost-Admin#397
- [ ] Built server side validations

core/server/api/settings.js

@@ -67,6 +67,9 @@ updateConfigCache = function () {
     config.set('theme:timezone', (settingsCache.activeTimezone && settingsCache.activeTimezone.value) || config.get('theme').timezone);
     config.set('theme:url', globalUtils.url.urlFor('home', true));
     config.set('theme:amp', (settingsCache.amp && settingsCache.amp.value === 'true'));
+    config.set('theme:favicon', (settingsCache.favicon && settingsCache.favicon.value) ?
+                                {type: 'upload', url: (settingsCache.favicon && settingsCache.favicon.value)} :
+                                {type: 'default', url: config.get('theme:favicon')});
 
     _.each(labsValue, function (value, key) {
         config.set('labs:' + key, value);

core/server/config/overrides.json

@@ -60,7 +60,11 @@
         "publishAPostBySchedulerToleranceInMinutes": 2
     },
     "theme": {
-        "timezone": "Etc/UTC"
+        "timezone": "Etc/UTC",
+        "favicon": {
+            "type": "default",
+            "url": "core/shared/favicon.ico"
+        }
     },
     "maintenance": {
         "enabled": false

core/server/data/schema/default-settings.json

@@ -29,6 +29,9 @@
         "cover": {
             "defaultValue": ""
         },
+        "favicon": {
+            "defaultValue": ""
+        },
         "defaultLang": {
             "defaultValue": "en_US",
             "validations": {

core/test/unit/config/index_spec.js

@@ -36,7 +36,11 @@ describe('Config', function () {
                     description: 'casper',
                     logo: 'casper',
                     cover: 'casper',
-                    timezone: 'Etc/UTC'
+                    timezone: 'Etc/UTC',
+                    favicon: {
+                        type: 'default',
+                        url: 'core/shared/favicon.ico'
+                    }
                 }
             });
         });
@@ -45,7 +49,7 @@ describe('Config', function () {
             var themeConfig = config.get('theme');
 
             // This will fail if there are any extra keys
-            themeConfig.should.have.keys('title', 'description', 'logo', 'cover', 'timezone');
+            themeConfig.should.have.keys('title', 'description', 'logo', 'cover', 'timezone', 'favicon');
         });
 
         it('should have the correct values for each key', function () {
@@ -57,6 +61,10 @@ describe('Config', function () {
             themeConfig.should.have.property('logo', 'casper');
             themeConfig.should.have.property('cover', 'casper');
             themeConfig.should.have.property('timezone', 'Etc/UTC');
+            themeConfig.should.have.property('favicon', {
+                type: 'default',
+                url: 'core/shared/favicon.ico'
+            });
         });
     });
 
@@ -85,6 +93,43 @@ describe('Config', function () {
         });
     });
 
+    describe('Favicon default', function () {
+        it('should use uploaded favicon', function () {
+            var themeConfig = config.get('theme');
+
+            // Check values are as we expect
+            themeConfig.should.have.property('favicon', {
+                type: 'default',
+                url: 'core/shared/favicon.ico'
+            });
+
+            configUtils.set({
+                theme: {
+                    favicon: {
+                        type: 'upload',
+                        url: 'content/images/favicon.ico'
+                    }
+                }
+            });
+
+            config.get('theme').should.have.property('favicon', {
+                type: 'upload',
+                url: 'content/images/favicon.ico'
+            });
+        });
+
+        it('should set theme object with default favicon', function () {
+            var themeConfig = configUtils.defaultConfig;
+
+            // Check values are as we expect
+            themeConfig.should.have.property('theme');
+            themeConfig.theme.should.have.property('favicon', {
+                type: 'default',
+                url: 'core/shared/favicon.ico'
+            });
+        });
+    });
+
     describe('Index', function () {
         it('should have exactly the right keys', function () {
             var pathConfig = config.get('paths');