add commands loader

deps.ts

@@ -7,3 +7,5 @@ export type {
   Redis,
   RedisConnectOptions
 } from 'https://deno.land/x/redis@v0.14.1/mod.ts'
+export { walk } from 'https://deno.land/std@0.86.0/fs/walk.ts'
+export { join } from 'https://deno.land/std@0.86.0/path/mod.ts'

src/models/command.ts

@@ -5,7 +5,7 @@ import { User } from '../structures/user.ts'
 import { Collection } from '../utils/collection.ts'
 import { CommandClient } from './commandClient.ts'
 import { Extension } from './extensions.ts'
-import { parse } from '../../deps.ts'
+import { join, parse, walk } from '../../deps.ts'
 
 export interface CommandContext {
   /** The Client object */
@@ -284,13 +284,103 @@ export class CommandBuilder extends Command {
   }
 }
 
+export class CommandsLoader {
+  client: CommandClient
+  #importSeq: { [name: string]: number } = {}
+
+  constructor(client: CommandClient) {
+    this.client = client
+  }
+
+  /**
+   * Load a Command from file.
+   *
+   * @param filePath Path of Command file.
+   * @param exportName Export name. Default is the "default" export.
+   */
+  async load(
+    filePath: string,
+    exportName: string = 'default',
+    onlyRead?: boolean
+  ): Promise<Command> {
+    const stat = await Deno.stat(filePath).catch(() => undefined)
+    if (stat === undefined || stat.isFile !== true)
+      throw new Error(`File not found on path ${filePath}`)
+
+    let seq: number | undefined
+
+    if (this.#importSeq[filePath] !== undefined) seq = this.#importSeq[filePath]
+    const mod = await import(
+      // eslint-disable-next-line @typescript-eslint/restrict-plus-operands
+      'file:///' +
+        join(Deno.cwd(), filePath) +
+        (seq === undefined ? '' : `#${seq}`)
+    )
+    if (this.#importSeq[filePath] === undefined) this.#importSeq[filePath] = 0
+    else this.#importSeq[filePath]++
+
+    const Cmd = mod[exportName]
+    if (Cmd === undefined)
+      throw new Error(`Command not exported as ${exportName} from ${filePath}`)
+
+    let cmd: Command
+    try {
+      if (Cmd instanceof Command) cmd = Cmd
+      else cmd = new Cmd()
+      if (!(cmd instanceof Command)) throw new Error('failed')
+    } catch (e) {
+      throw new Error(`Failed to load Command from ${filePath}`)
+    }
+
+    if (onlyRead !== true) this.client.commands.add(cmd)
+    return cmd
+  }
+
+  /**
+   * Load commands from a Directory.
+   *
+   * @param path Path of the directory.
+   * @param options Options to configure loading.
+   */
+  async loadDirectory(
+    path: string,
+    options?: {
+      recursive?: boolean
+      exportName?: string
+      maxDepth?: number
+      exts?: string[]
+      onlyRead?: boolean
+    }
+  ): Promise<Command[]> {
+    const commands: Command[] = []
+
+    for await (const entry of walk(path, {
+      maxDepth: options?.maxDepth,
+      exts: options?.exts,
+      includeDirs: false
+    })) {
+      if (entry.isFile !== true) continue
+      const cmd = await this.load(
+        entry.path,
+        options?.exportName,
+        options?.onlyRead
+      )
+      commands.push(cmd)
+    }
+
+    return commands
+  }
+}
+
 export class CommandsManager {
   client: CommandClient
   list: Collection<string, Command> = new Collection()
   disabled: Set<string> = new Set()
+  loader: CommandsLoader
 
   constructor(client: CommandClient) {
     this.client = client
+    this.loader = new CommandsLoader(client)
   }
 
   /** Number of loaded Commands */

src/models/commandClient.ts

@@ -1,6 +1,5 @@
 import { Message } from '../structures/message.ts'
 import { GuildTextChannel } from '../structures/textChannel.ts'
-import { awaitSync } from '../utils/mixedPromise.ts'
 import { Client, ClientOptions } from './client.ts'
 import {
   CategoriesManager,
@@ -129,35 +128,29 @@ export class CommandClient extends Client implements CommandClientOptions {
   async processMessage(msg: Message): Promise<any> {
     if (!this.allowBots && msg.author.bot === true) return
 
-    const isUserBlacklisted = await awaitSync(
-      this.isUserBlacklisted(msg.author.id)
-    )
-    if (isUserBlacklisted === true) return
+    const isUserBlacklisted = await this.isUserBlacklisted(msg.author.id)
+    if (isUserBlacklisted) return
 
-    const isChannelBlacklisted = await awaitSync(
-      this.isChannelBlacklisted(msg.channel.id)
-    )
-    if (isChannelBlacklisted === true) return
+    const isChannelBlacklisted = await this.isChannelBlacklisted(msg.channel.id)
+    if (isChannelBlacklisted) return
 
     if (msg.guild !== undefined) {
-      const isGuildBlacklisted = await awaitSync(
-        this.isGuildBlacklisted(msg.guild.id)
-      )
-      if (isGuildBlacklisted === true) return
+      const isGuildBlacklisted = await this.isGuildBlacklisted(msg.guild.id)
+      if (isGuildBlacklisted) return
     }
 
     let prefix: string | string[] = []
     if (typeof this.prefix === 'string') prefix = [...prefix, this.prefix]
     else prefix = [...prefix, ...this.prefix]
 
-    const userPrefix = await awaitSync(this.getUserPrefix(msg.author.id))
+    const userPrefix = await this.getUserPrefix(msg.author.id)
     if (userPrefix !== undefined) {
       if (typeof userPrefix === 'string') prefix = [...prefix, userPrefix]
       else prefix = [...prefix, ...userPrefix]
     }
 
     if (msg.guild !== undefined) {
-      const guildPrefix = await awaitSync(this.getGuildPrefix(msg.guild.id))
+      const guildPrefix = await this.getGuildPrefix(msg.guild.id)
       if (guildPrefix !== undefined) {
         if (typeof guildPrefix === 'string') prefix = [...prefix, guildPrefix]
         else prefix = [...prefix, ...guildPrefix]
@@ -361,10 +354,10 @@ export class CommandClient extends Client implements CommandClientOptions {
     try {
       this.emit('commandUsed', ctx)
 
-      const beforeExecute = await awaitSync(command.beforeExecute(ctx))
+      const beforeExecute = await command.beforeExecute(ctx)
       if (beforeExecute === false) return
 
-      const result = await awaitSync(command.execute(ctx))
+      const result = await command.execute(ctx)
       command.afterExecute(ctx, result)
     } catch (e) {
       this.emit('commandError', ctx, e)

src/utils/mixedPromise.ts

@@ -1,3 +0,0 @@
-export const awaitSync = async (val: any | Promise<any>): Promise<any> => {
-  return val instanceof Promise ? await val : val
-}