#39 I must be notified by email when an article is changed

add function CitizenI.Name.getFullName()
2020-05-12 16:13:40 +02:00
parent 5db451ef0e
commit eca5d1fe33
10 changed files with 219 additions and 117 deletions
--- a/src/main/kotlin/messages/NotificationEmailSender.kt
+++ b/src/main/kotlin/messages/NotificationEmailSender.kt
@@ -0,0 +1,66 @@
+package fr.dcproject.messages
+
+import com.sendgrid.helpers.mail.Mail
+import com.sendgrid.helpers.mail.objects.Content
+import com.sendgrid.helpers.mail.objects.Email
+import fr.dcproject.entity.*
+import fr.postgresjson.entity.immutable.UuidEntityI
+import java.util.*
+import fr.dcproject.repository.Citizen as CitizenRepository
+import fr.dcproject.repository.Article as ArticleRepository
+
+class NotificationEmailSender(
+    private val mailer: Mailer,
+    private val domain: String,
+    private val citizenRepo: CitizenRepository,
+    private val articleRepo: ArticleRepository
+) {
+    fun sendEmail(follow: FollowSimple<out TargetRef, CitizenRef>) {
+        val citizen = citizenRepo.findById(follow.createdBy.id) ?: noCitizen(follow.createdBy.id)
+        val target = when (follow.target.reference) {
+            "article" ->
+                articleRepo.findById(follow.target.id) ?: noTarget(follow.target.id)
+            else -> noTarget(follow.target.id)
+        }
+        val subject = when (follow.target.reference) {
+            "article" -> """New version for article "${target.title}""""
+            else -> "Notification"
+        }
+        mailer.sendEmail {
+            Mail(
+                Email("notification@$domain"),
+                subject,
+                Email(citizen.email),
+                Content("text/plain", generateContent(citizen, target))
+            ).apply {
+                addContent(Content("text/html", generateHtmlContent(citizen, target)))
+            }
+        }
+    }
+
+    private fun generateHtmlContent(citizen: CitizenBasicI, target: UuidEntityI): String? {
+        return when (target) {
+            is Article -> """
+                Hello ${citizen.name.getFullName()},<br/>
+                The article "${target.title}" was updated, check it <a href="http://$domain/articles/${target.id}">here</a>
+            """.trimIndent()
+            else -> noTarget(target.id)
+        }
+    }
+
+    private fun generateContent(citizen: CitizenBasicI, target: UuidEntityI): String {
+        return when (target) {
+            is Article -> """
+                Hello ${citizen.name.getFullName()},
+                The article "${target.title}" was updated, check it here: http://$domain/articles/${target.id}
+            """.trimIndent()
+            else -> noTarget(target.id)
+        }
+    }
+
+    class NoCitizen(message: String) : Exception(message)
+    class NoTarget(message: String) : Exception(message)
+
+    private fun noCitizen(id: UUID): Nothing = throw NoCitizen("No Citizen with this id : $id")
+    private fun noTarget(id: UUID): Nothing = throw NoTarget("No Target with this id : $id")
+}