Add comments to Prisma Schema and GraphQL server (#162)

* Lowercase all relations in prisma/graphql schema

* Add Comments data model and graphql schema

* Make comments availalble on the api through resolvers and guard them

* Update front graphql schema

* Fix PR

server/src/api/resolvers/guards/create-one-comment-thread.guard.ts

@@ -0,0 +1,104 @@
+import {
+  CanActivate,
+  ExecutionContext,
+  HttpException,
+  HttpStatus,
+  Injectable,
+} from '@nestjs/common';
+import { GqlExecutionContext } from '@nestjs/graphql';
+import { PrismaService } from 'src/database/prisma.service';
+
+@Injectable()
+export class CreateOneCommentThreadGuard implements CanActivate {
+  constructor(private prismaService: PrismaService) {}
+
+  async canActivate(context: ExecutionContext): Promise<boolean> {
+    const gqlContext = GqlExecutionContext.create(context);
+    const request = gqlContext.getContext().req;
+    const args = gqlContext.getArgs();
+
+    const targets = args.data?.commentThreadTargets?.createMany?.data;
+    const comments = args.data?.comments?.createMany?.data;
+    const workspaceId = await request.workspace;
+
+    if (!targets || targets.length === 0) {
+      throw new HttpException(
+        { reason: 'Missing commentThreadTargets' },
+        HttpStatus.BAD_REQUEST,
+      );
+    }
+
+    await targets.map(async (target) => {
+      if (!target.commentableId || !target.commentableType) {
+        throw new HttpException(
+          {
+            reason:
+              'Missing commentThreadTarget.commentableId or commentThreadTarget.commentableType',
+          },
+          HttpStatus.BAD_REQUEST,
+        );
+      }
+
+      if (!['Person', 'Company'].includes(target.commentableType)) {
+        throw new HttpException(
+          { reason: 'Invalid commentThreadTarget.commentableType' },
+          HttpStatus.BAD_REQUEST,
+        );
+      }
+
+      const targetEntity = await this.prismaService[
+        target.commentableType
+      ].findUnique({
+        where: { id: target.commentableId },
+      });
+
+      if (targetEntity.workspaceId !== workspaceId) {
+        throw new HttpException(
+          { reason: 'CommentThreadTarget not found' },
+          HttpStatus.NOT_FOUND,
+        );
+      }
+    });
+
+    if (!comments) {
+      return true;
+    }
+
+    await comments.map(async (comment) => {
+      if (!comment.authorId) {
+        throw new HttpException(
+          { reason: 'Missing comment.authorId' },
+          HttpStatus.BAD_REQUEST,
+        );
+      }
+
+      const author = await this.prismaService.user.findUnique({
+        where: { id: comment.authorId },
+      });
+
+      if (!author) {
+        throw new HttpException(
+          { reason: 'Comment.authorId not found' },
+          HttpStatus.NOT_FOUND,
+        );
+      }
+
+      const userWorkspaceMember =
+        await this.prismaService.workspaceMember.findFirst({
+          where: { userId: author.id },
+        });
+
+      if (
+        !userWorkspaceMember ||
+        userWorkspaceMember.workspaceId !== workspaceId
+      ) {
+        throw new HttpException(
+          { reason: 'Comment.authorId not found' },
+          HttpStatus.NOT_FOUND,
+        );
+      }
+    });
+
+    return true;
+  }
+}