Migrate ReactionRoles to new Plugin structure

backend/src/plugins/ReactionRoles/util/addMemberPendingRoleChange.ts

@@ -0,0 +1,59 @@
+import { PluginData } from "knub";
+import { ReactionRolesPluginType, RoleChangeMode, PendingMemberRoleChanges } from "../types";
+import { resolveMember } from "src/utils";
+import { logger } from "src/logger";
+
+const ROLE_CHANGE_BATCH_DEBOUNCE_TIME = 1500;
+
+export async function addMemberPendingRoleChange(
+  pluginData: PluginData<ReactionRolesPluginType>,
+  memberId: string,
+  mode: RoleChangeMode,
+  roleId: string,
+) {
+  if (!pluginData.state.pendingRoleChanges.has(memberId)) {
+    const newPendingRoleChangeObj: PendingMemberRoleChanges = {
+      timeout: null,
+      changes: [],
+      applyFn: async () => {
+        pluginData.state.pendingRoleChanges.delete(memberId);
+
+        const lock = await pluginData.locks.acquire(`member-roles-${memberId}`);
+
+        const member = await resolveMember(pluginData.client, pluginData.guild, memberId);
+        if (member) {
+          const newRoleIds = new Set(member.roles);
+          for (const change of newPendingRoleChangeObj.changes) {
+            if (change.mode === "+") newRoleIds.add(change.roleId);
+            else newRoleIds.delete(change.roleId);
+          }
+
+          try {
+            await member.edit(
+              {
+                roles: Array.from(newRoleIds.values()),
+              },
+              "Reaction roles",
+            );
+          } catch (e) {
+            logger.warn(
+              `Failed to apply role changes to ${member.username}#${member.discriminator} (${member.id}): ${e.message}`,
+            );
+          }
+        }
+        lock.unlock();
+      },
+    };
+
+    pluginData.state.pendingRoleChanges.set(memberId, newPendingRoleChangeObj);
+  }
+
+  const pendingRoleChangeObj = pluginData.state.pendingRoleChanges.get(memberId);
+  pendingRoleChangeObj.changes.push({ mode, roleId });
+
+  if (pendingRoleChangeObj.timeout) clearTimeout(pendingRoleChangeObj.timeout);
+  pendingRoleChangeObj.timeout = setTimeout(
+    () => pluginData.state.roleChangeQueue.add(pendingRoleChangeObj.applyFn),
+    ROLE_CHANGE_BATCH_DEBOUNCE_TIME,
+  );
+}