Adds transfer of leadership of a group

source/Discord/CommandPartials/GroupSelection.ts

@@ -14,7 +14,7 @@ export class GroupSelection {
     public static createOptionSetup(): SlashCommandIntegerOption {
         return new SlashCommandIntegerOption()
             .setName("group")
-            .setDescription("Defines the group you want to manage the playdates for")
+            .setDescription("Defines the group this action is for")
             .setRequired(true)
             .setAutocomplete(true)
     }

source/Discord/Commands/Groups.ts

@@ -9,7 +9,7 @@ import {
     GuildMember,
     EmbedBuilder,
     AutocompleteInteraction,
-    formatEmoji, roleMention, time
+    formatEmoji, roleMention, time, userMention
 } from "discord.js";
 import {AutocompleteCommand, ChatInteractionCommand, Command} from "./Command";
 import {GroupModel} from "../../Models/GroupModel";
@@ -26,6 +26,7 @@ import {GroupConfigurationRepository} from "../../Repositories/GroupConfiguratio
 import {IconCache} from "../../Icons/IconCache";
 import {PlaydateRepository} from "../../Repositories/PlaydateRepository";
 import playdate from "../../Database/tables/Playdate";
+import Commands from "./Commands";
 
 export class GroupCommand implements Command, ChatInteractionCommand, AutocompleteCommand {
     private static GOODBYE_MESSAGES: string[] = [
@@ -68,6 +69,16 @@ export class GroupCommand implements Command, ChatInteractionCommand, Autocomple
                 .setName("remove")
                 .setDescription("Deletes a group you are the leader for.")
                 .addIntegerOption(GroupSelection.createOptionSetup())
+            )
+            .addSubcommand(command => command
+                .setName("transfer")
+                .setDescription("Transfers leadership of a group to a different person")
+                .addIntegerOption(GroupSelection.createOptionSetup)
+                .addUserOption(option => option
+                    .setName("target")
+                    .setDescription("The member, that is the new leader")
+                    .setRequired(true)
+                )
             );
     }
 
@@ -85,6 +96,9 @@ export class GroupCommand implements Command, ChatInteractionCommand, Autocomple
             case "config":
                 await this.runConfigurator(interaction);
                 break;
+            case "transfer":
+                await this.transferLeadership(interaction);
+                break;
             default:
                 throw new Error("Unsupported command");
         }
@@ -201,4 +215,40 @@ export class GroupCommand implements Command, ChatInteractionCommand, Autocomple
         
         await configurationRenderer.setup(interaction);
     }
+
+    private async transferLeadership(interaction: ChatInputCommandInteraction) {
+        const group = GroupSelection.getGroup(interaction);
+
+        const repo = Container.get<GroupRepository>(GroupRepository.name);
+        if (group.leader.memberid != interaction.member?.user.id) {
+            throw new UserError(
+                "Can't transfer leadership. You are not the leader."
+            );
+        }
+        
+        const newLeader = <GuildMember>interaction.options.getMember("target", true);
+        if (!newLeader.roles.cache.has(group.role.roleid)) {
+            throw new UserError(
+                "Can't transfer leadership: The target member is not part of your group.",
+                "Add the user to the role this group is part in or ask your server admin to do it."
+            );
+        }
+        
+        group.leader.memberid = newLeader.id
+        repo.update(group);
+
+
+        const embed = new EmbedBuilder()
+            .setTitle("Leadership transfered")
+            .setDescription(
+                `Leadership was successfully transfered to ${userMention(newLeader.user.id)}`
+            )
+
+        await interaction.reply({
+            embeds: [
+                embed
+            ],
+            flags: MessageFlags.Ephemeral,
+        })
+    }
 }

source/Discord/DiscordClient.ts

@@ -6,7 +6,7 @@ import {
     ChatInputCommandInteraction,
     MessageFlags,
     Activity,
-    ActivityType, REST
+    ActivityType, REST, inlineCode
 } from "discord.js";
 import Commands from "./Commands/Commands";
 import {Container} from "../Container/Container";
@@ -96,6 +96,12 @@ export class DiscordClient {
                     let userMessage = ":x: There was an error while executing this command!";
                     if (e.constructor.name === UserError.name) {
                         userMessage = `:x: \`${e.message}\` - Please validate your request!`
+                        if (e.tryInstead) {
+                            userMessage += `
+
+You can try the following:
+${inlineCode(e.tryInstead)}`
+                        }
                     }
                     if (interaction.replied || interaction.deferred) {
                         await interaction.followUp({ content: userMessage, flags: MessageFlags.Ephemeral });

source/Discord/UserError.ts

@@ -1,3 +1,10 @@
 export class UserError extends Error {
-    
+    constructor(
+        message: string,
+        public readonly tryInstead: string|null = null
+    ) {
+        super(message);
+        
+    }
+
 }