From 79a9f1509c4430f6e65c67e41098ef7aaa227c3f Mon Sep 17 00:00:00 2001
From: Vitaly Takmazov
Date: Thu, 4 Jul 2019 14:31:22 +0300
Subject: Render email using templates

* do not include tracking pixel in pm
* reorganize snapshots layout
* reconfigure pebble to not trim anything
---
 src/main/java/com/juick/server/EmailManager.java   | 49 ++++++++++++++++++----
 .../server/configuration/WwwAppConfiguration.java  |  1 +
 2 files changed, 42 insertions(+), 8 deletions(-)

(limited to 'src/main/java/com/juick/server')

diff --git a/src/main/java/com/juick/server/EmailManager.java b/src/main/java/com/juick/server/EmailManager.java
index af4ed416..3d17a041 100644
--- a/src/main/java/com/juick/server/EmailManager.java
+++ b/src/main/java/com/juick/server/EmailManager.java
@@ -7,6 +7,8 @@ import com.juick.service.MessagesService;
 import com.juick.service.UserService;
 import com.juick.service.component.*;
 import com.juick.util.MessageUtils;
+import com.mitchellbosecke.pebble.PebbleEngine;
+import com.mitchellbosecke.pebble.template.PebbleTemplate;
 import org.apache.commons.lang3.StringUtils;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -22,9 +24,13 @@ import javax.mail.internet.InternetAddress;
 import javax.mail.internet.MimeBodyPart;
 import javax.mail.internet.MimeMessage;
 import javax.mail.internet.MimeMultipart;
+import java.io.IOException;
+import java.io.StringWriter;
+import java.io.Writer;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.Optional;
 import java.util.Properties;
 
 import static com.juick.formatters.PlainTextFormatter.formatPost;
@@ -42,6 +48,9 @@ public class EmailManager implements NotificationListener {
     private MessagesService messagesService;
     @Inject
     private UserService userService;
+    @Inject
+    private PebbleEngine pebbleEngine;
+
     @Override
     public void processMessageEvent(@Nonnull MessageEvent event) {
         Message msg = event.getMessage();
@@ -107,15 +116,9 @@ public class EmailManager implements NotificationListener {
                 headers.put("In-Reply-To", String.format("<%d.%d@juick.com>", original.getMid(), original.getRid()));
             }
         }
-        String plainText = String.format("%s\n\n--\nYou are receiving this because you are subscribed to this user," +
-                        " discussion, tag or mentioned. Reply to this email directly or view it on Juick: %s.",
-                formatPost(msg), formatUrl(msg));
+        String plainText = renderPlaintext(formatPost(msg), formatUrl(msg)).orElseThrow(IllegalStateException::new);
         String hash = userService.getHashByUID(userService.getUserByEmail(email).getUid());
-        String htmlText = String.format("%s<br /><br />--<br />You are receiving this because you are subscribed to this user" +
-                        ", discussion, tag or mentioned. Reply to this email directly or <a href=\"%s\"><img src=\"https://api.juick.com/thread/mark_read/%d-%d.gif?hash=%s\" />view it</a> on Juick." +
-                        "<br /><a href=\"https://juick.com/settings?hash=%s\">Configure or disable notifications</a>",
-                msg.isHtml() ? msg.getText() : MessageUtils.formatHtml(msg), formatUrl(msg),
-                msg.getMid(), msg.getRid(), hash, hash);
+        String htmlText = renderHtml(MessageUtils.formatHtml(msg), formatUrl(msg), msg, hash).orElseThrow(IllegalStateException::new);
         sendEmail(email, subject, plainText, htmlText, headers);
     }
     public void sendEmail(String to, String subject, String textPart, String htmlPart, Map<String, String> messageHeaders) {
@@ -162,4 +165,34 @@ public class EmailManager implements NotificationListener {
             logger.error("mail exception", ex);
         }
     }
+
+    public Optional<String> renderPlaintext(String body, String messageUrl) {
+        PebbleTemplate noteTemplate = pebbleEngine.getTemplate("email/plaintext");
+        Map<String, Object> context = new HashMap<>();
+        context.put("messageBody", body);
+        context.put("messageUrl", messageUrl);
+        try {
+            Writer writer = new StringWriter();
+            noteTemplate.evaluate(writer, context);
+            return Optional.of(writer.toString());
+        } catch (IOException e) {
+            return Optional.empty();
+        }
+    }
+
+    public Optional<String> renderHtml(String body, String messageUrl, Message msg, String hash) {
+        PebbleTemplate noteTemplate = pebbleEngine.getTemplate("email/html");
+        Map<String, Object> context = new HashMap<>();
+        context.put("messageBody", body);
+        context.put("messageUrl", messageUrl);
+        context.put("msg", msg);
+        context.put("hash", hash);
+        try {
+            Writer writer = new StringWriter();
+            noteTemplate.evaluate(writer, context);
+            return Optional.of(writer.toString());
+        } catch (IOException e) {
+            return Optional.empty();
+        }
+    }
 }
diff --git a/src/main/java/com/juick/server/configuration/WwwAppConfiguration.java b/src/main/java/com/juick/server/configuration/WwwAppConfiguration.java
index 93fe7282..635302c7 100644
--- a/src/main/java/com/juick/server/configuration/WwwAppConfiguration.java
+++ b/src/main/java/com/juick/server/configuration/WwwAppConfiguration.java
@@ -113,6 +113,7 @@ public class WwwAppConfiguration implements WebMvcConfigurer {
                 .cacheActive(!devToolsArePresent)
                 .extension(springExtension())
                 .extension(new FormatterExtension())
+                .newLineTrimming(false)
                 .strictVariables(true)
                 .build();
     }
-- 
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