Support gad_* and gclid parameters

Author: Blaumaus

src/utils.ts

@@ -8,12 +8,18 @@ const findInSearch = (exp: RegExp): string | undefined => {
   return (res && res[2]) || undefined
 }
 
-const utmSourceRegex = /[?&](ref|source|utm_source)=([^?&]+)/
-const utmCampaignRegex = /[?&](utm_campaign)=([^?&]+)/
+const utmSourceRegex = /[?&](ref|source|utm_source|gad_source)=([^?&]+)/
+const utmCampaignRegex = /[?&](utm_campaign|gad_campaignid)=([^?&]+)/
 const utmMediumRegex = /[?&](utm_medium)=([^?&]+)/
 const utmTermRegex = /[?&](utm_term)=([^?&]+)/
 const utmContentRegex = /[?&](utm_content)=([^?&]+)/
 
+const gclidRegex = /[?&](gclid)=([^?&]+)/
+
+const getGclid = () => {
+  return findInSearch(gclidRegex) ? '<gclid>' : undefined
+}
+
 export const isInBrowser = () => {
   return typeof window !== 'undefined'
 }
@@ -44,7 +50,7 @@ export const getReferrer = (): string | undefined => {
 
 export const getUTMSource = () => findInSearch(utmSourceRegex)
 
-export const getUTMMedium = () => findInSearch(utmMediumRegex)
+export const getUTMMedium = () => findInSearch(utmMediumRegex) || getGclid()
 
 export const getUTMCampaign = () => findInSearch(utmCampaignRegex)