Added limit service

refs: https://github.com/TryGhost/Team/issues/510

- added and wired up the new limit service, which is a lazy-loaded service
- this handles the case that there are host limits set in config, and wraps all the logic needed for detecting exceeded limits & throwing limit errors
- expects limits to be set in config under `host_settings.limits`
- supported limits are managed in the limit service, outside of core

core/boot.js

@@ -156,6 +156,7 @@ async function initServices({config}) {
     const {mega} = require('./server/services/mega');
     const webhooks = require('./server/services/webhooks');
     const appService = require('./frontend/services/apps');
+    const limits = require('./server/services/limits');
     const scheduling = require('./server/adapters/scheduling');
 
     const urlUtils = require('./shared/url-utils');
@@ -167,6 +168,7 @@ async function initServices({config}) {
         mega.listen(),
         webhooks.listen(),
         appService.init(),
+        limits.init(),
         scheduling.init({
             // NOTE: When changing API version need to consider how to migrate custom scheduling adapters
             //       that rely on URL to lookup persisted scheduled records (jobs, etc.). Ref: https://github.com/TryGhost/Ghost/pull/10726#issuecomment-489557162

core/server/services/limits.js

@@ -0,0 +1,24 @@
+const config = require('../../shared/config');
+const db = require('../data/db');
+const LimitService = require('@tryghost/limit-service');
+let limitService = new LimitService();
+
+const initFn = () => {
+    let helpLink;
+
+    if (!config.get('host_settings') || !config.get('host_settings:limits')) {
+        return;
+    }
+
+    if (config.get('host_settings:billing:enabled') && config.get('host_settings:billing:enabled') === true && config.get('host_settings:billing:url')) {
+        helpLink = config.get('host_settings:billing:url');
+    } else {
+        helpLink = 'https://ghost.org/help/';
+    }
+
+    limitService.loadLimits({limits: config.get('host_settings:limits'), db, helpLink});
+};
+
+module.exports = limitService;
+
+module.exports.init = initFn;

package.json

@@ -56,6 +56,7 @@
     "@tryghost/kg-default-cards": "4.0.0-rc.6",
     "@tryghost/kg-markdown-html-renderer": "4.0.0-rc.2",
     "@tryghost/kg-mobiledoc-html-renderer": "4.0.0-rc.1",
+    "@tryghost/limit-service": "^0.1.0",
     "@tryghost/magic-link": "0.6.7",
     "@tryghost/members-api": "1.0.0-rc.4",
     "@tryghost/members-csv": "0.4.5",

yarn.lock

@@ -495,6 +495,13 @@
   dependencies:
     "@tryghost/kg-clean-basic-html" "^1.0.11"
 
+"@tryghost/limit-service@^0.1.0":
+  version "0.1.0"
+  resolved "https://registry.yarnpkg.com/@tryghost/limit-service/-/limit-service-0.1.0.tgz#df0b7c4a04858cf655640e1750ad6923da132de2"
+  integrity sha512-9BRAqjSNlqZAedSbry2lULvaCaY4ahAbv+7daRfCLu1ieZPBfQ1wc0pqfgdvGnK2pQRb6X/1WNRHkuaCQigPtg==
+  dependencies:
+    lodash "^4.17.21"
+
 "@tryghost/magic-link@0.6.7", "@tryghost/magic-link@^0.6.7":
   version "0.6.7"
   resolved "https://registry.yarnpkg.com/@tryghost/magic-link/-/magic-link-0.6.7.tgz#9bdf76fa014f08a09cc38c308d659900626902c9"
@@ -5991,7 +5998,7 @@ lodash@4.17.20, lodash@^4.17.20, lodash@~4.17.20:
   resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.20.tgz#b44a9b6297bcb698f1c51a3545a2b3b368d59c52"
   integrity sha512-PlhdFcillOINfeV7Ni6oF1TAEayyZBoZ8bcshTHqOYJYlrqzRK5hagpagky5o4HfCzzd1TRkXPMFq6cKk9rGmA==
 
-lodash@4.17.21:
+lodash@4.17.21, lodash@^4.17.21:
   version "4.17.21"
   resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.21.tgz#679591c564c3bffaae8454cf0b3df370c3d6911c"
   integrity sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg==