System Console: Email notification content setting (#7122)

* PLT-7195: Added new config option, new license feature, and config UI to system console. Still need to implement behaviour change in email batching code

* PLT-7195: Modified batch emails to respect email notification content type setting

* PLT-7195: Tweaking the colours a bit

* PLT-7195: Added support for email notification content type setting in immediate (non-batched) notification messages. Attempted to clean up the code somewhat. Unit tests coming in a future commit

* PLT-7195: Added unit tests for non-batched emails

* Checked license when applying email content settings

* Changed return type of getFormattedPostTime

app/email_batching_test.go

@@ -4,6 +4,7 @@
 package app
 
 import (
+	"strings"
 	"testing"
 	"time"
 
@@ -271,3 +272,53 @@ func TestCheckPendingNotificationsCantParseInterval(t *testing.T) {
 		t.Fatal("should have sent queued post")
 	}
 }
+
+/*
+ * Ensures that post contents are not included in notification email when email notification content type is set to generic
+ */
+func TestRenderBatchedPostGeneric(t *testing.T) {
+	Setup()
+	var post = &model.Post{}
+	post.Message = "This is the message"
+	var notification = &batchedNotification{}
+	notification.post = post
+	var channel = &model.Channel{}
+	channel.DisplayName = "Some Test Channel"
+	var sender = &model.User{}
+	sender.Email = "sender@test.com"
+
+	translateFunc := func(translationID string, args ...interface{}) string {
+		// mock translateFunc just returns the translation id - this is good enough for our purposes
+		return translationID
+	}
+
+	var rendered = renderBatchedPost(notification, channel, sender, "http://localhost:8065", "", translateFunc, "en", model.EMAIL_NOTIFICATION_CONTENTS_GENERIC)
+	if strings.Contains(rendered, post.Message) {
+		t.Fatal("Rendered email should not contain post contents when email notification contents type is set to Generic.")
+	}
+}
+
+/*
+ * Ensures that post contents included in notification email when email notification content type is set to full
+ */
+func TestRenderBatchedPostFull(t *testing.T) {
+	Setup()
+	var post = &model.Post{}
+	post.Message = "This is the message"
+	var notification = &batchedNotification{}
+	notification.post = post
+	var channel = &model.Channel{}
+	channel.DisplayName = "Some Test Channel"
+	var sender = &model.User{}
+	sender.Email = "sender@test.com"
+
+	translateFunc := func(translationID string, args ...interface{}) string {
+		// mock translateFunc just returns the translation id - this is good enough for our purposes
+		return translationID
+	}
+
+	var rendered = renderBatchedPost(notification, channel, sender, "http://localhost:8065", "", translateFunc, "en", model.EMAIL_NOTIFICATION_CONTENTS_FULL)
+	if !strings.Contains(rendered, post.Message) {
+		t.Fatal("Rendered email should contain post contents when email notification contents type is set to Full.")
+	}
+}