feat(bootstrap): add config set array

instead of calling the beforeFirstHit callback and set manually each field the developer needs,
it is now possible to just write an array of field/value pairs to set before the first hit

Author: Matteo Gabriele

src/add-setters.js

@@ -0,0 +1,15 @@
+import set from 'lib/set'
+import config from './config'
+
+export default function addSetters () {
+  config.set.forEach(({ field, value }) => {
+    if (typeof field === 'undefined' || typeof value === 'undefined') {
+      throw new Error(
+        '[vue-analytics] Wrong configuration in the plugin options.\n' + 
+        'The "set" array requires each item to have a "field" and a "value" property.'
+      )
+    }
+
+    set(field, value)
+  })
+}

src/bootstrap.js

@@ -2,6 +2,7 @@ import load from 'load-script'
 import { onAnalyticsReady, hasGoogleScript } from './helpers'
 import config, { update } from './config'
 import createTrackers from './create-trackers'
+import addSetters from './add-setters'
 import untracked from 'lib/untracked'
 import { startAutoTracking as pageAutoTracking } from 'lib/page'
 import { startAutoTracking as exceptionAutoTracking } from 'lib/exception'
@@ -35,6 +36,7 @@ export default function bootstrap () {
   .then(() => onAnalyticsReady())
   .then(() => {
     createTrackers()
+    addSetters()
     ready()
     exceptionAutoTracking()
     pageAutoTracking()

src/config.js

@@ -7,6 +7,8 @@ const defaultConfig = {
   ignoreRoutes: [],
   linkers: [],
 
+  set: [],
+
   autoTracking: {
     exception: false,
     page: true,