Finally made the commands directory configurable

src/core/handler.ts

@@ -1,6 +1,5 @@
 import {Client, Permissions, Message, TextChannel, DMChannel, NewsChannel} from "discord.js";
-import {loadableCommands} from "./loader";
-import {getPrefix} from "./interface";
+import {getPrefix, loadableCommands} from "./interface";
 
 // For custom message events that want to cancel the command handler on certain conditions.
 const interceptRules: ((message: Message) => boolean)[] = [(message) => message.author.bot];

src/core/interface.ts

@@ -1,23 +1,52 @@
-import {Client, User, GuildMember, Guild} from "discord.js";
+import {Collection, Client, User, GuildMember, Guild} from "discord.js";
 import {attachMessageHandlerToClient} from "./handler";
 import {attachEventListenersToClient} from "./eventListeners";
-
-interface LaunchSettings {
-    permissionLevels: PermissionLevel[];
-    getPrefix: (guild: Guild | null) => string;
-}
-
-export async function launch(client: Client, settings: LaunchSettings) {
-    attachMessageHandlerToClient(client);
-    attachEventListenersToClient(client);
-    permissionLevels = settings.permissionLevels;
-    getPrefix = settings.getPrefix;
-}
+import {NamedCommand} from "./command";
+import {loadCommands} from "./loader";
 
 interface PermissionLevel {
     name: string;
     check: (user: User, member: GuildMember | null) => boolean;
 }
 
-export let permissionLevels: PermissionLevel[] = [];
-export let getPrefix: (guild: Guild | null) => string = () => ".";
+type PrefixResolver = (guild: Guild | null) => string;
+type CategoryTransformer = (text: string) => string;
+
+// One potential option is to let the user customize system messages such as "This command must be executed in a guild."
+// I decided not to do that because I don't think it'll be worth the trouble.
+interface LaunchSettings {
+    permissionLevels?: PermissionLevel[];
+    getPrefix?: PrefixResolver;
+    categoryTransformer?: CategoryTransformer;
+}
+
+// One alternative to putting everything in launch(client, ...) is to create an object then set each individual aspect, such as OnionCore.setPermissions(...).
+// That way, you can split different pieces of logic into different files, then do OnionCore.launch(client).
+// Additionally, each method would return the object so multiple methods could be chained, such as OnionCore.setPermissions(...).setPrefixResolver(...).launch(client).
+// I decided to not do this because creating a class then having a bunch of boilerplate around it just wouldn't really be worth it.
+// commandsDirectory requires an absolute path to work, so use __dirname.
+export async function launch(client: Client, commandsDirectory: string, settings?: LaunchSettings) {
+    // Core Launch Parameters //
+    loadableCommands = loadCommands(commandsDirectory);
+    attachMessageHandlerToClient(client);
+    attachEventListenersToClient(client);
+
+    // Additional Configuration //
+    if (settings?.permissionLevels) {
+        if (settings.permissionLevels.length > 0) permissionLevels = settings.permissionLevels;
+        else console.warn("permissionLevels must have at least one element to work!");
+    }
+    if (settings?.getPrefix) getPrefix = settings.getPrefix;
+    if (settings?.categoryTransformer) categoryTransformer = settings.categoryTransformer;
+}
+
+// Placeholder until properly loaded by the user.
+export let loadableCommands = (async () => new Collection<string, NamedCommand>())();
+export let permissionLevels: PermissionLevel[] = [
+    {
+        name: "User",
+        check: () => true
+    }
+];
+export let getPrefix: PrefixResolver = () => ".";
+export let categoryTransformer: CategoryTransformer = (text) => text;

src/core/loader.ts

@@ -1,35 +1,46 @@
 import {Collection} from "discord.js";
 import glob from "glob";
+import path from "path";
 import {NamedCommand, CommandInfo} from "./command";
-import {toTitleCase} from "../lib";
+import {loadableCommands, categoryTransformer} from "./interface";
 
 // Internally, it'll keep its original capitalization. It's up to you to convert it to title case when you make a help command.
 const categories = new Collection<string, string[]>();
 
-/** Returns the cache of the commands if it exists and searches the directory if not. */
-export const loadableCommands = (async () => {
+// This will go through all the .js files and import them. Because the import has to be .js (and cannot be .ts), there's no need for a custom filename checker in the launch settings.
+// This will avoid the problems of being a node module by requiring absolute imports, which the user will pass in as a launch parameter.
+export async function loadCommands(commandsDir: string): Promise<Collection<string, NamedCommand>> {
+    // Add a trailing separator so that the reduced filename list will reliably cut off the starting part.
+    // "C:/some/path/to/commands" --> "C:/some/path/to/commands/" (and likewise for \)
+    commandsDir = path.normalize(commandsDir);
+    if (!commandsDir.endsWith(path.sep)) commandsDir += path.sep;
+
     const commands = new Collection<string, NamedCommand>();
     // Include all .ts files recursively in "src/commands/".
-    const files = await globP("src/commands/**/*.ts");
-    // Extract the usable parts from "src/commands/" if:
+    const files = await globP(path.join(commandsDir, "**", "*.js")); // This stage filters out source maps (.js.map).
+    // Because glob will use / regardless of platform, the following regex pattern can rely on / being the case.
+    const filesClean = files.map((filename) => filename.substring(commandsDir.length));
+    // Extract the usable parts from commands directory if:
     // - The path is 1 to 2 subdirectories (a or a/b, not a/b/c)
     // - Any leading directory isn't "modules"
-    // - The filename doesn't end in .test.ts (for jest testing)
-    // - The filename cannot be the hardcoded top-level "template.ts", reserved for generating templates
-    const pattern = /src\/commands\/(?!template\.ts)(?!modules\/)(\w+(?:\/\w+)?)(?:test\.)?\.ts/;
+    // - The filename doesn't end in .test.js (for jest testing)
+    // - The filename cannot be the hardcoded top-level "template.js", reserved for generating templates
+    const pattern = /^(?!template\.js)(?!modules\/)(\w+(?:\/\w+)?)(?:test\.)?\.js$/;
     const lists: {[category: string]: string[]} = {};
 
-    for (const path of files) {
-        const match = pattern.exec(path);
-
-        if (match) {
+    for (let i = 0; i < files.length; i++) {
+        const match = pattern.exec(filesClean[i]);
+        if (!match) continue;
         const commandID = match[1]; // e.g. "utilities/info"
         const slashIndex = commandID.indexOf("/");
         const isMiscCommand = slashIndex !== -1;
         const category = isMiscCommand ? commandID.substring(0, slashIndex) : "miscellaneous";
         const commandName = isMiscCommand ? commandID.substring(slashIndex + 1) : commandID; // e.g. "info"
+
+        // This try-catch block MUST be here or Node.js' dynamic require() will silently fail.
+        try {
             // If the dynamic import works, it must be an object at the very least. Then, just test to see if it's a proper instance.
-            const command = (await import(`../commands/${commandID}`)).default as unknown;
+            const command = (await import(files[i])).default as unknown;
 
             if (command instanceof NamedCommand) {
                 command.name = commandName;
@@ -55,10 +66,12 @@ export const loadableCommands = (async () => {
                 if (!(category in lists)) lists[category] = [];
                 lists[category].push(commandName);
 
-                console.log(`Loading Command: ${commandID}`);
+                console.log(`Loaded Command: ${commandID}`);
             } else {
                 console.warn(`Command "${commandID}" has no default export which is a NamedCommand instance!`);
             }
+        } catch (error) {
+            console.log(error);
         }
     }
 
@@ -67,7 +80,7 @@ export const loadableCommands = (async () => {
     }
 
     return commands;
-})();
+}
 
 function globP(path: string) {
     return new Promise<string[]>((resolve, reject) => {
@@ -92,7 +105,7 @@ export async function getCommandList(): Promise<Collection<string, NamedCommand[
         const commandList: NamedCommand[] = [];
         for (const header of headers.filter((header) => header !== "test")) commandList.push(commands.get(header)!);
         // Ignore empty categories like "miscellaneous" (if it's empty).
-        if (commandList.length > 0) list.set(toTitleCase(category), commandList);
+        if (commandList.length > 0) list.set(categoryTransformer(category), commandList);
     }
 
     return list;
@@ -120,7 +133,7 @@ export async function getCommandInfo(args: string[]): Promise<[CommandInfo, stri
     let category = "Unknown";
     for (const [referenceCategory, headers] of categories) {
         if (headers.includes(header)) {
-            category = toTitleCase(referenceCategory);
+            category = categoryTransformer(referenceCategory);
             break;
         }
     }

src/core/permissions.ts

@@ -6,6 +6,7 @@ import {permissionLevels} from "./interface";
  * Checks if a `Member` has a certain permission.
  */
 export function hasPermission(user: User, member: GuildMember | null, permission: number): boolean {
+    if (permissionLevels.length === 0) return true;
     for (let i = permissionLevels.length - 1; i >= permission; i--)
         if (permissionLevels[i].check(user, member)) return true;
     return false;
@@ -20,6 +21,6 @@ export function getPermissionLevel(user: User, member: GuildMember | null): numb
 }
 
 export function getPermissionName(level: number) {
-    if (level > permissionLevels.length || level < 0) return "N/A";
+    if (level > permissionLevels.length || level < 0 || permissionLevels.length === 0) return "N/A";
     else return permissionLevels[level].name;
 }

src/index.ts

@@ -1,21 +1,25 @@
-// Bootstrapping Section //
 import "./modules/globals";
 import {Client, Permissions} from "discord.js";
-import {launch} from "./core";
-import setup from "./modules/setup";
-import {Config, getPrefix} from "./structures";
+import path from "path";
 
 // This is here in order to make it much less of a headache to access the client from other files.
 // This of course won't actually do anything until the setup process is complete and it logs in.
 export const client = new Client();
 
+import {launch} from "./core";
+import setup from "./modules/setup";
+import {Config, getPrefix} from "./structures";
+import {toTitleCase} from "./lib";
+
 // Send the login request to Discord's API and then load modules while waiting for it.
 setup.init().then(() => {
     client.login(Config.token).catch(setup.again);
 });
 
 // Setup the command handler.
-launch(client, {
+launch(client, path.join(__dirname, "commands"), {
+    getPrefix,
+    categoryTransformer: toTitleCase,
     permissionLevels: [
         {
             // NONE //
@@ -57,8 +61,7 @@ launch(client, {
             name: "Bot Owner",
             check: (user) => Config.owner === user.id
         }
-    ],
-    getPrefix: getPrefix
+    ]
 });
 
 // Initialize Modules //