Removed usages of new Error & i18n in legacy code

- cleaning up a handful of usages of i18n and new Error in some really old codepaths
- pushing our new patterns forward wherever we can

core/server/services/permissions/can-this.js

@@ -2,10 +2,16 @@ const _ = require('lodash');
 const Promise = require('bluebird');
 const models = require('../../models');
 const errors = require('@tryghost/errors');
-const i18n = require('../../../shared/i18n');
+const tpl = require('@tryghost/tpl');
 const providers = require('./providers');
 const parseContext = require('./parse-context');
 const actionsMap = require('./actions-map-cache');
+
+const messages = {
+    noPermissionToAction: 'You do not have permission to perform this action',
+    noActionsMapFoundError: 'No actions map found, ensure you have loaded permissions into database and then call permissions.init() before use.'
+};
+
 let canThis;
 let CanThisResult;
 
@@ -104,7 +110,7 @@ CanThisResult.prototype.buildObjectTypeHandlers = function (objTypes, actType, c
                     return;
                 }
 
-                return Promise.reject(new errors.NoPermissionError({message: i18n.t('errors.permissions.noPermissionToAction')}));
+                return Promise.reject(new errors.NoPermissionError({message: tpl(messages.noPermissionToAction)}));
             });
         };
 
@@ -122,7 +128,7 @@ CanThisResult.prototype.beginCheck = function (context) {
     context = parseContext(context);
 
     if (actionsMap.empty()) {
-        throw new Error(i18n.t('errors.permissions.noActionsMapFound.error'));
+        throw new errors.GhostError({message: tpl(messages.noActionsMapFoundError)});
     }
 
     // Kick off loading of user permissions if necessary

core/server/services/slack.js

@@ -1,6 +1,6 @@
 const errors = require('@tryghost/errors');
 const events = require('../lib/common/events');
-const i18n = require('../../shared/i18n');
+const tpl = require('@tryghost/tpl');
 const logging = require('@tryghost/logging');
 const request = require('@tryghost/request');
 const {blogIcon} = require('../lib/image');
@@ -10,6 +10,11 @@ const settingsCache = require('../../shared/settings-cache');
 const schema = require('../data/schema').checks;
 const moment = require('moment');
 
+const messages = {
+    requestFailedError: 'The {service} service was unable to send a ping request, your site will continue to function.',
+    requestFailedHelp: 'If you get this error repeatedly, please seek help on {url}.'
+};
+
 const defaultPostSlugs = [
     'welcome',
     'the-editor',
@@ -131,8 +136,8 @@ function ping(post) {
         }).catch(function (err) {
             logging.error(new errors.GhostError({
                 err: err,
-                context: i18n.t('errors.services.ping.requestFailed.error', {service: 'slack'}),
-                help: i18n.t('errors.services.ping.requestFailed.help', {url: 'https://ghost.org/docs/'})
+                context: tpl(messages.requestFailedError, {service: 'slack'}),
+                help: tpl(messages.requestFailedHelp, {url: 'https://ghost.org/docs/'})
             }));
         });
     }

core/server/services/xmlrpc.js

@@ -4,12 +4,17 @@ const config = require('../../shared/config');
 const urlService = require('../../frontend/services/url');
 const errors = require('@tryghost/errors');
 const events = require('../lib/common/events');
-const i18n = require('../../shared/i18n');
+const tpl = require('@tryghost/tpl');
 const logging = require('@tryghost/logging');
 const request = require('@tryghost/request');
 const settingsCache = require('../../shared/settings-cache');
 const sentry = require('../../shared/sentry');
 
+const messages = {
+    requestFailedError: 'The {service} service was unable to send a ping request, your site will continue to function.',
+    requestFailedHelp: 'If you get this error repeatedly, please seek help on {url}.'
+};
+
 const defaultPostSlugs = [
     'welcome',
     'the-editor',
@@ -80,7 +85,7 @@ function ping(post) {
                 if (!goodResponse.test(res.body)) {
                     const matches = res.body.match(errorMessage);
                     const message = matches ? matches[1] : res.body;
-                    throw new Error(message);
+                    throw new errors.GhostError({message});
                 }
             })
             .catch(function (err) {
@@ -89,15 +94,15 @@ function ping(post) {
                     error = new errors.TooManyRequestsError({
                         err,
                         message: err.message,
-                        context: i18n.t('errors.services.ping.requestFailed.error', {service: 'xmlrpc'}),
-                        help: i18n.t('errors.services.ping.requestFailed.help', {url: 'https://ghost.org/docs/'})
+                        context: tpl(messages.requestFailedError, {service: 'xmlrpc'}),
+                        help: tpl(messages.requestFailedHelp, {url: 'https://ghost.org/docs/'})
                     });
                 } else {
                     error = new errors.GhostError({
                         err: err,
                         message: err.message,
-                        context: i18n.t('errors.services.ping.requestFailed.error', {service: 'xmlrpc'}),
-                        help: i18n.t('errors.services.ping.requestFailed.help', {url: 'https://ghost.org/docs/'})
+                        context: tpl(messages.requestFailedError, {service: 'xmlrpc'}),
+                        help: tpl(messages.requestFailedHelp, {url: 'https://ghost.org/docs/'})
                     });
                 }
                 logging.error(error);

core/shared/i18n/translations/en.json

@@ -271,9 +271,6 @@
             }
         },
         "permissions": {
-            "noActionsMapFound": {
-                "error": "No actions map found, ensure you have loaded permissions into database and then call permissions.init() before use."
-            },
             "applyStatusRules": {
                 "error": "You do not have permission to retrieve {docName} with that status"
             },
@@ -561,12 +558,6 @@
             }
         },
         "services": {
-            "ping": {
-                "requestFailed": {
-                    "error": "The {service} service was unable to send a ping request, your site will continue to function.",
-                    "help": "If you get this error repeatedly, please seek help on {url}."
-                }
-            },
             "settings": {
                 "yaml": {
                     "error": "Could not parse {file}: {context}.",