From fb6dabc7ca0603054bd0c02021fd06a34d1f947d Mon Sep 17 00:00:00 2001
From: Ray Clark <raynichc@users.noreply.github.com>
Date: Sun, 5 Apr 2020 11:30:12 +1000
Subject: [PATCH] Escaped newlines in strings to prevent faliure of &embedraw

---
 .../command/registrar/RegistrarUtil.java      | 27 +++++++------------
 src/main/java/com/ibdiscord/utils/UInput.java | 18 +++++++++++++
 2 files changed, 28 insertions(+), 17 deletions(-)

diff --git a/src/main/java/com/ibdiscord/command/registrar/RegistrarUtil.java b/src/main/java/com/ibdiscord/command/registrar/RegistrarUtil.java
index 6557ca93..f9230b6b 100644
--- a/src/main/java/com/ibdiscord/command/registrar/RegistrarUtil.java
+++ b/src/main/java/com/ibdiscord/command/registrar/RegistrarUtil.java
@@ -40,6 +40,7 @@
 import com.ibdiscord.reminder.Reminder;
 import com.ibdiscord.reminder.ReminderHandler;
 import com.ibdiscord.utils.UDatabase;
+import com.ibdiscord.utils.UInput;
 import com.ibdiscord.utils.UString;
 import de.arraying.gravity.Gravity;
 import de.arraying.kotys.JSON;
@@ -86,15 +87,11 @@ public void register(CommandRegistry registry) {
                         return;
                     }
                     context.assertArguments(2, "error.missing_data");
-                    StringBuilder jsonBuilder = new StringBuilder();
-                    for (int i = 1; i < context.getArguments().length; i++) {
-                        jsonBuilder.append(context.getArguments()[i]).append(" ");
-                    }
-
+                    String json = UInput.escapeLinebreakInQuotations(UString.concat(context.getArguments(), " ", 1));
                     JSON embed;
 
                     try {
-                        embed = new JSON(jsonBuilder.toString());
+                        embed = new JSON(json.toString());
                     } catch (IllegalStateException e) {
                         context.replyI18n("error.missing_data");
                         return;
@@ -174,18 +171,14 @@ public void register(CommandRegistry registry) {
                             .noneMatch(it -> it.getName().equalsIgnoreCase("update"))) {
                         target.sendMessage(builder.build()).queue();
                     } else {
-                        try {
-                            for (Option option : context.getOptions()) {
-                                if (option.getName().equalsIgnoreCase("update")) {
-                                    long id = Long.valueOf(option.getValue());
-                                    target.retrieveMessageById(id)
-                                            .queue(success -> target.editMessageById(id, builder.build()).queue(),
-                                                failure -> context.replyI18n("error.pin_channel"));
-                                    break;
-                                }
+                        for (Option option : context.getOptions()) {
+                            if (option.getName().equalsIgnoreCase("update")) {
+                                long id = UString.toLong(option.getValue());
+                                target.retrieveMessageById(id)
+                                        .queue(success -> target.editMessageById(id, builder.build()).queue(),
+                                            failure -> context.replyI18n("error.pin_channel"));
+                                break;
                             }
-                        } catch(NumberFormatException exception) {
-                            exception.printStackTrace();
                         }
                     }
                 });
diff --git a/src/main/java/com/ibdiscord/utils/UInput.java b/src/main/java/com/ibdiscord/utils/UInput.java
index 60524d2b..9cf9a945 100644
--- a/src/main/java/com/ibdiscord/utils/UInput.java
+++ b/src/main/java/com/ibdiscord/utils/UInput.java
@@ -65,6 +65,11 @@ public final class UInput {
      */
     private static final Pattern QUOTATION_MARK = Pattern.compile("[“”„«»]");
 
+    /**
+     * The regular expression for a (universal) quotation.
+     */
+    private static final Pattern QUOTATION = Pattern.compile("[\"“”„«»][^“”„«»\"]*[“”„«»\"]");
+
     /**
      * Gets the member corresponding to the given user input.
      * @param guild The guild.
@@ -204,4 +209,17 @@ public static boolean isValidRegex(String regex) {
         }
     }
 
+    /**
+     * Escapes newline characters found within quotations only.
+     * @param input The string to escape.
+     * @return Escaped string.
+     */
+    public static String escapeLinebreakInQuotations(String input) {
+        StringBuilder string = new StringBuilder(input);
+        QUOTATION.matcher(string.toString()).results().forEach(matchResult ->
+                string.replace(matchResult.start(), matchResult.end(),
+                        matchResult.group().replaceAll("\n", "\\\\n")));
+        return string.toString();
+    }
+
 }