Implement Mailer

build.gradle.kts

@@ -49,6 +49,7 @@ dependencies {
     implementation("net.pearx.kasechange:kasechange-jvm:1.1.0")
     implementation("com.auth0:java-jwt:3.8.2")
     implementation("fr.postgresjson:postgresjson:$postgresjson_version")
+    implementation("com.sendgrid:sendgrid-java:4.4.1")
 
     testImplementation("io.ktor:ktor-server-tests:$ktor_version")
     testImplementation("io.ktor:ktor-client-mock:$ktor_version")

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
+        }
+    }
+}

src/main/resources/application.conf

@@ -19,3 +19,9 @@ db {
     password = dc-project
     port = 5432
 }
+
+mail {
+    sendGrid {
+        key = ${?SEND_GRID_KEY}
+    }
+}

src/test/kotlin/MailerTest.kt

@@ -0,0 +1,28 @@
+import fr.dcproject.Env
+import fr.dcproject.messages.Mailer
+import fr.dcproject.module
+import io.ktor.locations.KtorExperimentalLocationsAPI
+import io.ktor.server.testing.withTestApplication
+import io.ktor.util.KtorExperimentalAPI
+import org.junit.jupiter.api.Test
+import org.junit.jupiter.api.TestInstance
+import org.koin.test.AutoCloseKoinTest
+import org.koin.test.KoinTest
+import org.koin.test.get
+
+@KtorExperimentalLocationsAPI
+@KtorExperimentalAPI
+@TestInstance(TestInstance.Lifecycle.PER_CLASS)
+class MailerTest: KoinTest, AutoCloseKoinTest() {
+    @Test
+    fun `can be send an email`() {
+        withTestApplication({ module(Env.TEST) }) {
+            get<Mailer>().sendEmail(
+                "reset-password@dc-project.fr",
+                "fabrice.lecomte.be@gmail.com",
+                "Email Work !",
+                "Test"
+            )
+        }
+    }
+}

src/test/kotlin/RepositoryTest.kt

@@ -1,16 +1,16 @@
-import fr.dcproject.Module
+import fr.dcproject.Env
 import fr.dcproject.entity.Article
 import fr.dcproject.entity.Constitution
+import fr.dcproject.module
 import io.ktor.locations.KtorExperimentalLocationsAPI
+import io.ktor.server.testing.withTestApplication
 import io.ktor.util.KtorExperimentalAPI
 import org.amshove.kluent.`should equal`
 import org.amshove.kluent.shouldBe
-import org.junit.jupiter.api.BeforeAll
 import org.junit.jupiter.api.Test
 import org.junit.jupiter.api.TestInstance
 import org.junit.jupiter.api.TestInstance.Lifecycle.PER_CLASS
-import org.koin.core.context.startKoin
-import org.koin.dsl.koinApplication
+import org.koin.test.AutoCloseKoinTest
 import org.koin.test.KoinTest
 import org.koin.test.get
 import fr.dcproject.repository.Article as RepositoryArticle
@@ -19,15 +19,10 @@ import fr.dcproject.repository.Constitution as RepositoryConstitution
 @KtorExperimentalLocationsAPI
 @KtorExperimentalAPI
 @TestInstance(PER_CLASS)
-class RepositoryTest: KoinTest {
-    @BeforeAll
-    fun beforeAll() {
-        startKoin { modules(Module) }
-    }
-
+class RepositoryTest: KoinTest, AutoCloseKoinTest() {
     @Test
     fun `test get repository`() {
-        koinApplication {
+        withTestApplication({ module(Env.TEST) }) {
             val repoArticle = get<RepositoryArticle>()
             (repoArticle is RepositoryArticle) shouldBe true
             repoArticle.entityName `should equal` Article::class