Answer to original message text

FAQ.md

@@ -389,6 +389,7 @@ The low priority status bar notification shows the number of pending operations,
 * *subscribe*: subscribe to remote folder
 * *send*: send message
 * *exists*: check if message exists
+* *rule*: execute rule on body text
 
 Operations are processed only when there is a connection to the email server or when manually synchronizing.
 See also [this FAQ](#user-content-faq16).

app/src/main/java/eu/faircode/email/Core.java

@@ -381,6 +381,10 @@ class Core {
                                     onSubscribeFolder(context, jargs, folder, (IMAPFolder) ifolder);
                                     break;
 
+                                case EntityOperation.RULE:
+                                    onRule(context, jargs, message);
+                                    break;
+
                                 default:
                                     throw new IllegalArgumentException("Unknown operation=" + op.name);
                             }
@@ -1711,6 +1715,21 @@ class Core {
         Log.i(folder.name + " subscribed=" + subscribe);
     }
 
+    private static void onRule(Context context, JSONArray jargs, EntityMessage message) throws JSONException, IOException {
+        // Download message body
+        DB db = DB.getInstance(context);
+
+        long id = jargs.getLong(0);
+        EntityRule rule = db.rule().getRule(id);
+        if (rule == null)
+            throw new IllegalArgumentException("Rule not found id=" + id);
+
+        if (!message.content)
+            throw new IllegalArgumentException("Message without content id=" + rule.id + ":" + rule.name);
+
+        rule.execute(context, message);
+    }
+
     private static void onSynchronizeMessages(
             Context context, JSONArray jargs,
             EntityAccount account, final EntityFolder folder,

app/src/main/java/eu/faircode/email/EntityOperation.java

@@ -98,6 +98,7 @@ public class EntityOperation {
     static final String SUBSCRIBE = "subscribe";
     static final String SEND = "send";
     static final String EXISTS = "exists";
+    static final String RULE = "rule";
 
     static void queue(Context context, EntityMessage message, String name, Object... values) {
         DB db = DB.getInstance(context);

app/src/main/java/eu/faircode/email/EntityRule.java

@@ -36,6 +36,8 @@ import androidx.room.PrimaryKey;
 
 import org.json.JSONException;
 import org.json.JSONObject;
+import org.jsoup.nodes.Document;
+import org.jsoup.nodes.Element;
 
 import java.io.File;
 import java.io.IOException;
@@ -407,6 +409,12 @@ public class EntityRule {
     }
 
     private boolean onActionAnswer(Context context, EntityMessage message, JSONObject jargs) throws JSONException, IOException {
+        if (!message.content) {
+            EntityOperation.queue(context, message, EntityOperation.BODY);
+            EntityOperation.queue(context, message, EntityOperation.RULE, this.id);
+            return true;
+        }
+
         long iid = jargs.getLong("identity");
         long aid = jargs.getLong("answer");
         boolean cc = (jargs.has("cc") && jargs.getBoolean("cc"));
@@ -458,6 +466,22 @@ public class EntityRule {
         reply.id = db.message().insertMessage(reply);
 
         String body = answer.getText(message.from);
+        Document msg = JsoupEx.parse(body);
+
+        Element div = msg.createElement("div");
+
+        Element p = msg.createElement("p");
+        DateFormat DF = Helper.getDateTimeInstance(context);
+        p.text(DF.format(new Date(message.received)) + " " + MessageHelper.formatAddresses(message.from) + ":");
+        div.appendChild(p);
+
+        Document answering = JsoupEx.parse(message.getFile(context));
+        div.appendChild(answering.body().tagName("blockquote"));
+
+        msg.body().appendChild(div);
+
+        body = msg.outerHtml();
+
         File file = reply.getFile(context);
         Helper.writeText(file, body);
         db.message().setMessageContent(reply.id,