feat(GuildMemberManager#prune): roles query param

src/managers/GuildMemberManager.js

@@ -134,6 +134,7 @@ class GuildMemberManager extends BaseManager {
    * @param {number} [options.days=7] Number of days of inactivity required to kick
    * @param {boolean} [options.dry=false] Get number of users that will be kicked, without actually kicking them
    * @param {boolean} [options.count=true] Whether or not to return the number of users that have been kicked.
+   * @param {RoleResolvable[]} [options.roles=[]] Array of roles to bypass the "...and no roles" constraint when pruning
    * @param {string} [options.reason] Reason for this prune
    * @returns {Promise<number|null>} The number of members that were/will be kicked
    * @example
@@ -146,19 +147,40 @@ class GuildMemberManager extends BaseManager {
    * guild.members.prune({ days: 1, reason: 'too many people!' })
    *   .then(pruned => console.log(`I just pruned ${pruned} people!`))
    *   .catch(console.error);
+   * @example
+   * // Include members with a specified role
+   * guild.members.prune({ days: 7, roles: ['657259391652855808'] })
+   *    .then(pruned => console.log(`I just pruned ${pruned} people!`))
+   *    .catch(console.error);
    */
-  prune({ days = 7, dry = false, count = true, reason } = {}) {
+  prune({ days = 7, dry = false, count = true, roles = [], reason } = {}) {
     if (typeof days !== 'number') throw new TypeError('PRUNE_DAYS_TYPE');
-    return this.client.api
-      .guilds(this.guild.id)
-      .prune[dry ? 'get' : 'post']({
-        query: {
-          days,
-          compute_prune_count: count,
-        },
-        reason,
-      })
-      .then(data => data.pruned);
+
+    const query = new URLSearchParams();
+    query.set('days', days);
+    query.set('compute_prune_count', count);
+
+    for (const role of roles) {
+      const resolvedRole = this.guild.roles.resolveID(role);
+      if (!resolvedRole) {
+        return Promise.reject(new TypeError('INVALID_TYPE', 'roles', 'Array of Roles or Snowflakes', true));
+      }
+      query.append('include_roles', role);
+    }
+
+    const endpoint = this.client.api.guilds(this.guild.id).prune;
+
+    if (dry) {
+      return endpoint.get({ query, reason }).then(data => data.pruned);
+    }
+
+    const body = [...query.entries()].reduce((acc, [k, v]) => {
+      if (k === 'include_roles') v = (acc[k] || []).concat(v);
+      acc[k] = v;
+      return acc;
+    }, {});
+
+    return endpoint.post({ data: body, reason }).then(data => data.pruned);
   }
 
   /**

typings/index.d.ts

@@ -2548,6 +2548,7 @@ declare module 'discord.js' {
     days?: number;
     dry?: boolean;
     reason?: string;
+    roles?: RoleResolvable[];
   }
 
   interface HTTPOptions {