regex helper

src/events/message/messageCreate.ts

@@ -2,6 +2,7 @@ import { Client, EmbedBuilder, Message, TextBasedChannel } from "discord.js";
 import { getLocale } from "../../utils/locales";
 import { isImage, userWithNickname } from "../../utils/misc";
 import { showDate } from "../../utils/time";
+import { RegexC, RegExpFlags } from "../../utils/regex";
 
 /** https://discord.js.org/#/docs/discord.js/main/class/Client?scrollTo=e-messageCreate */
 export default async (message: Message, client: Client) => {
@@ -24,7 +25,7 @@ export default async (message: Message, client: Client) => {
   /* Citation */
   const regex =
     /https:\/\/(?:canary\.|ptb\.)?discord(?:app)?\.com\/channels\/(\d{17,19})\/(\d{17,19})\/(\d{17,19})/g;
-  const urls = message.content.match(new RegExp(regex, "g"));
+  const urls = message.content.match(RegexC(regex, RegExpFlags.Global));
 
   // Ignore message if there is no URLs
   if (!urls) {
@@ -42,7 +43,7 @@ export default async (message: Message, client: Client) => {
             }[] = [],
             match,
           ) => {
-            const [, guild_id, channel_id, message_id] = new RegExp(regex).exec(
+            const [, guild_id, channel_id, message_id] = RegexC(regex).exec(
               match,
             ) as RegExpExecArray;
 
@@ -178,7 +179,7 @@ export default async (message: Message, client: Client) => {
 
       // Delete source message if no content when removing links
       if (
-        !message.content.replace(new RegExp(regex, "g"), "").trim() &&
+        !message.content.replace(RegexC(regex, RegExpFlags.Global), "").trim() &&
         messages.length === urls.length &&
         !message.mentions.repliedUser &&
         message.channel.isSendable()

src/tests/utils/regex.test.ts

@@ -0,0 +1,26 @@
+import { RegexC, RegExpFlags } from "../../utils/regex";
+
+describe("Regex flags", () => {
+  test("One parameter", () => {
+    const regex = RegexC("", RegExpFlags.Global);
+    expect(regex.global).toBeTruthy();
+  });
+
+  test("All parameters", () => {
+    const regex = RegexC(
+      "",
+      RegExpFlags.Global |
+        RegExpFlags.MultiLine |
+        RegExpFlags.Insensitive |
+        RegExpFlags.Sticky |
+        RegExpFlags.Unicode |
+        RegExpFlags.SingleLine,
+    );
+    expect(regex.global).toBeTruthy();
+    expect(regex.multiline).toBeTruthy();
+    expect(regex.ignoreCase).toBeTruthy();
+    expect(regex.sticky).toBeTruthy();
+    expect(regex.unicode).toBeTruthy();
+    expect(regex.dotAll).toBeTruthy();
+  });
+});

src/utils/regex.ts

@@ -0,0 +1,30 @@
+export enum RegExpFlags {
+  // Global
+  Global = 1 << 0,
+  // Multi Line
+  MultiLine = 1 << 1,
+  // Ignore Case
+  Insensitive = 1 << 2,
+  // Sticky
+  Sticky = 1 << 3,
+  // Unicode
+  Unicode = 1 << 4,
+  // Dot All
+  SingleLine = 1 << 6,
+}
+
+const flagsToString = (flags: number) => {
+  let result = "";
+
+  if (flags & RegExpFlags.Global) result += "g";
+  if (flags & RegExpFlags.MultiLine) result += "m";
+  if (flags & RegExpFlags.Insensitive) result += "i";
+  if (flags & RegExpFlags.Sticky) result += "y";
+  if (flags & RegExpFlags.Unicode) result += "u";
+  if (flags & RegExpFlags.SingleLine) result += "s";
+
+  return result;
+};
+
+export const RegexC = (pattern: RegExp | string, flags: number = 0) =>
+  new RegExp(pattern, flagsToString(flags));

src/utils/reminder.ts

@@ -2,6 +2,7 @@ import { Client, Colors, EmbedBuilder, User } from "discord.js";
 import { getLocale } from "./locales";
 import { cleanCodeBlock } from "./misc";
 import { showDate, strToSeconds, timeDeltaToString } from "./time";
+import { RegexC, RegExpFlags } from "./regex";
 
 /**
  * Option possible for reminders
@@ -52,7 +53,10 @@ export const splitTime = (time: string) => {
   };
 
   const lowered = time.toLowerCase();
-  const trimmed = lowered.replaceAll(new RegExp(Object.values(mapping).join("|"), "g"), "");
+  const trimmed = lowered.replaceAll(
+    RegexC(Object.values(mapping).join("|"), RegExpFlags.Global),
+    "",
+  );
 
   // Depending of the last character of the string
   switch (lowered.slice(-1)) {

src/utils/time.ts

@@ -1,4 +1,5 @@
 import moment from "moment-timezone";
+import { RegexC, RegExpFlags } from "./regex";
 
 /**
  * Parsed string adapted with TZ (locales) and format for the specified lang
@@ -41,7 +42,7 @@ export const strToSeconds = (time: string) => {
     return -1;
   }
 
-  const regex = new RegExp(
+  const regex = RegexC(
     `(?<${TimeSecond[TimeSecond.Year]}>[0-9]+(?=[y|a]))|(?<${
       TimeSecond[TimeSecond.Week]
     }>[0-9]+(?=[w]))|(?<${TimeSecond[TimeSecond.Day]}>[0-9]+(?=[d|j]))|(?<${
@@ -49,6 +50,7 @@ export const strToSeconds = (time: string) => {
     }>[0-9]+(?=[h]))|(?<${TimeSecond[TimeSecond.Minute]}>[0-9]+(?=[m]))|(?<${
       TimeSecond[TimeSecond.Second]
     }>[0-9]+(?=[s]?))`,
+    RegExpFlags.Global | RegExpFlags.Insensitive,
   );
 
   const data = Object.assign({}, regex.exec(time.toLowerCase())?.groups);