Add attachments (#733)

* Add attachments v1

* Refacto

* Add Policy checks

* Fix tests

* Remove generated files from git

---------

Co-authored-by: Charles Bochet <charles@twenty.com>

server/src/ability/handlers/attachment.ability-handler.ts

@@ -0,0 +1,67 @@
+import { PrismaService } from 'src/database/prisma.service';
+import { AbilityAction } from '../ability.action';
+import { AppAbility } from '../ability.factory';
+import { IAbilityHandler } from '../interfaces/ability-handler.interface';
+import {
+  ExecutionContext,
+  ForbiddenException,
+  Injectable,
+  NotFoundException,
+} from '@nestjs/common';
+import { assert } from 'src/utils/assert';
+import { GqlExecutionContext } from '@nestjs/graphql';
+import { subject } from '@casl/ability';
+
+class AttachmentArgs {
+  activityId?: string;
+}
+
+@Injectable()
+export class ManageAttachmentAbilityHandler implements IAbilityHandler {
+  async handle(ability: AppAbility) {
+    return ability.can(AbilityAction.Manage, 'Attachment');
+  }
+}
+
+@Injectable()
+export class ReadAttachmentAbilityHandler implements IAbilityHandler {
+  handle(ability: AppAbility) {
+    return ability.can(AbilityAction.Read, 'Attachment');
+  }
+}
+
+@Injectable()
+export class CreateAttachmentAbilityHandler implements IAbilityHandler {
+  constructor(private readonly prismaService: PrismaService) {}
+
+  async handle(ability: AppAbility, context: ExecutionContext) {
+    const gqlContext = GqlExecutionContext.create(context);
+    const args = gqlContext.getArgs<AttachmentArgs>();
+    assert(args.activityId, '', ForbiddenException);
+
+    const activity = await this.prismaService.commentThread.findUnique({
+      where: { id: args.activityId },
+      include: { workspace: true },
+    });
+    assert(activity, '', NotFoundException);
+
+    return ability.can(
+      AbilityAction.Update,
+      subject('Workspace', activity.workspace),
+    );
+  }
+}
+
+@Injectable()
+export class UpdateAttachmentAbilityHandler implements IAbilityHandler {
+  async handle(ability: AppAbility) {
+    return ability.can(AbilityAction.Update, 'Attachment');
+  }
+}
+
+@Injectable()
+export class DeleteAttachmentAbilityHandler implements IAbilityHandler {
+  async handle(ability: AppAbility) {
+    return ability.can(AbilityAction.Delete, 'Attachment');
+  }
+}