🏗 Updated "unsplash" setting handling to match updated format

refs https://github.com/TryGhost/Ghost/issues/10318

- JSON object format used in previous "unsplash" setting was considered an
anti-pattern. Flat structure was extracted out of the "unsplash.isActive" JSON.
- The naming convention uses `amp` as  a precedent (https://github.com/TryGhost/Team/issues/331#issuecomment-658815017)

core/server/data/migrations/versions/4.0/10-refactor-unsplash-setting.js

@@ -0,0 +1,29 @@
+const {createIrreversibleMigration} = require('../../utils');
+
+module.exports = createIrreversibleMigration(async (knex) => {
+    const unsplashSetting = await knex('settings')
+        .select('value')
+        .where({
+            key: 'unsplash'
+        })
+        .first();
+
+    let isActive;
+    try {
+        const value = JSON.parse(unsplashSetting.value);
+        isActive = typeof value.isActive === 'boolean' ? value.isActive : true;
+    } catch (err) {
+        isActive = true;
+    }
+
+    await knex('settings')
+        .update({
+            group: 'unsplash',
+            type: 'boolean',
+            flags: null,
+            value: isActive.toString()
+        })
+        .where({
+            key: 'unsplash'
+        });
+});

core/server/data/migrations/versions/4.0/20-refactor-unsplash-setting.js

@@ -0,0 +1,33 @@
+const logging = require('../../../../../shared/logging');
+const {createIrreversibleMigration} = require('../../utils');
+
+module.exports = createIrreversibleMigration(async (knex) => {
+    const unsplashSetting = await knex('settings')
+        .select('value')
+        .where({
+            key: 'unsplash'
+        })
+        .first();
+
+    let isActive;
+    try {
+        const value = JSON.parse(unsplashSetting.value);
+        isActive = typeof value.isActive === 'boolean' ? value.isActive : true;
+    } catch (err) {
+        logging.warn(`Wasn't able to parse 'unsplash' setting: ${unsplashSetting.value}, falling back to: 'true'`);
+        isActive = true;
+    }
+
+    logging.info(`Updating 'unsplash' setting to: ${isActive}`);
+
+    await knex('settings')
+        .update({
+            group: 'unsplash',
+            type: 'boolean',
+            flags: null,
+            value: isActive.toString()
+        })
+        .where({
+            key: 'unsplash'
+        });
+});

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

@@ -406,8 +406,12 @@
     },
     "unsplash": {
         "unsplash": {
-            "defaultValue": "{\"isActive\": true}",
-            "type": "object"
+            "defaultValue": "true",
+            "validations": {
+                "isEmpty": false,
+                "isIn": [["true", "false"]]
+            },
+            "type": "boolean"
         }
     },
     "views": {

test/unit/data/schema/integrity_spec.js

@@ -34,7 +34,7 @@ describe('DB version integrity', function () {
     // Only these variables should need updating
     const currentSchemaHash = '5861ed57418a0195ea01e431b8b55335';
     const currentFixturesHash = '370d0da0ab7c45050b2ff30bce8896ba';
-    const currentSettingsHash = '6db8d92f1b76b43946bf75fbac78599d';
+    const currentSettingsHash = 'e1f85186a7c7ed76064b6026f68c6321';
     const currentRoutesHash = '3d180d52c663d173a6be791ef411ed01';
 
     // If this test is failing, then it is likely a change has been made that requires a DB version bump,