Send email to user after publishing teks

.env.example

@@ -20,3 +20,5 @@ SMTP_PASSWORD=
 SMTP_FROM=
 SMTP_REPLY_TO=
 SMTP_SEND_TO=
+
+WEBSITE_URL=http://localhost:3000

api/teks/models/teks.js

@@ -20,6 +20,24 @@ module.exports = {
         const awtis = await jwennAwtisEpiId(data.awtis)
         data.slug = slugify(`${awtis}-${data.tit}`, {lower: true, remove: /[*#+~.()'"!:@]/g})
       }
+      if (data.published_at != null) {
+        const {_id} = params
+        const previousData = await strapi.query('teks').findOne({_id})
+
+        const previousPublishedAt = previousData.published_at
+        const currentPublished_at = data.published_at
+        if (currentPublished_at != previousPublishedAt) {
+          if (previousData.user) {
+            strapi.services.email.send(
+              process.env.SMTP_FROM,
+              previousData.user.email,
+              `Publication de "${previousData.tit}"`,
+              `Le titre que vous avez soumis, "${previousData.tit}" a été publié sur le site.
+              Vous pouvez le trouver à l'adresse ${process.env.WEBSITE_URL}/teks/${previousData.slug}`
+            )
+          }
+        }
+      }
     },
     afterCreate: async data => {
       if (data.user) {