Implement Mailer

src/main/kotlin/fr/dcproject/Configuration.kt

@@ -18,6 +18,8 @@ class Config {
     var username: String = config.getString("db.username")
     var password: String = config.getString("db.password")
     val port: Int = config.getInt("db.port")
+
+    val sendGridKey: String = config.getString("mail.sendGrid.key")
 }
 
 object JwtConfig {

src/main/kotlin/fr/dcproject/Module.kt

@@ -1,5 +1,6 @@
 package fr.dcproject
 
+import fr.dcproject.messages.Mailer
 import fr.postgresjson.connexion.Connection
 import fr.postgresjson.connexion.Requester
 import fr.postgresjson.migration.Migrations
@@ -47,4 +48,6 @@ val Module = module {
     single { VoteCommentRepository(get()) }
 
     single { Migrations(connection = get(), directory = config.sqlFiles) }
+
+    single { Mailer(config.sendGridKey)  }
 }

src/main/kotlin/fr/dcproject/messages/Mailer.kt

@@ -0,0 +1,34 @@
+package fr.dcproject.messages
+
+import com.sendgrid.Method
+import com.sendgrid.Request
+import com.sendgrid.SendGrid
+import com.sendgrid.helpers.mail.Mail
+import com.sendgrid.helpers.mail.objects.Content
+import com.sendgrid.helpers.mail.objects.Email
+import java.io.IOException
+
+class Mailer (
+    private val key: String
+) {
+    fun sendEmail(from: String, to: String, content: String, subject: String): Boolean {
+        val mail = Mail(
+            Email(from),
+            subject,
+            Email(to),
+            Content("text/plain", content)
+        )
+
+        val sg = SendGrid(key)
+        val request = Request()
+        try {
+            request.method = Method.POST
+            request.endpoint = "mail/send"
+            request.body = mail.build()
+            val response = sg.api(request)
+            return response.statusCode == 202
+        } catch (ex: IOException) {
+            throw ex
+        }
+    }
+}