fix(ClientPermissions): check app permissions when used with user apps (#797)

Co-authored-by: Aura <kyradiscord@gmail.com>
Co-authored-by: Jeroen Claassens <support@favware.tech>

Author: 3 people

src/preconditions/ClientPermissions.ts

@@ -55,11 +55,9 @@ export class CorePrecondition extends AllFlowsPrecondition {
 	): AllFlowsPrecondition.AsyncResult {
 		const required = context.permissions ?? new PermissionsBitField();
 
-		const channel = await this.fetchChannelFromInteraction(interaction);
+		const availablePermissions = await this.getAvailablePermissions(interaction);
 
-		const permissions = await this.getPermissionsForChannel(channel, interaction);
-
-		return this.sharedRun(required, permissions, 'chat input');
+		return this.sharedRun(required, availablePermissions, 'chat input');
 	}
 
 	public async contextMenuRun(
@@ -69,11 +67,9 @@ export class CorePrecondition extends AllFlowsPrecondition {
 	): AllFlowsPrecondition.AsyncResult {
 		const required = context.permissions ?? new PermissionsBitField();
 
-		const channel = await this.fetchChannelFromInteraction(interaction);
-
-		const permissions = await this.getPermissionsForChannel(channel, interaction);
+		const availablePermissions = await this.getAvailablePermissions(interaction);
 
-		return this.sharedRun(required, permissions, 'context menu');
+		return this.sharedRun(required, availablePermissions, 'context menu');
 	}
 
 	private async getPermissionsForChannel(channel: TextBasedChannel, messageOrInteraction: Message | BaseInteraction) {
@@ -113,6 +109,17 @@ export class CorePrecondition extends AllFlowsPrecondition {
 				});
 	}
 
+	private async getAvailablePermissions(interaction: ChatInputCommandInteraction | ContextMenuCommandInteraction) {
+		if (interaction.channel) {
+			if (interaction.channel.isDMBased()) return this.dmChannelPermissions;
+
+			const channel = await this.fetchChannelFromInteraction(interaction);
+			return this.getPermissionsForChannel(channel, interaction);
+		}
+
+		return interaction.appPermissions;
+	}
+
 	public static readonly readablePermissions: Record<PermissionsString, string> = {
 		AddReactions: 'Add Reactions',
 		Administrator: 'Administrator',