feat: add folders (#1711)

packages/lib/server-only/folder/get-folder-by-id.ts

@@ -0,0 +1,92 @@
+import { TeamMemberRole } from '@prisma/client';
+import { match } from 'ts-pattern';
+
+import { AppError, AppErrorCode } from '@documenso/lib/errors/app-error';
+import { prisma } from '@documenso/prisma';
+
+import { DocumentVisibility } from '../../types/document-visibility';
+import type { TFolderType } from '../../types/folder-type';
+
+export interface GetFolderByIdOptions {
+  userId: number;
+  teamId?: number;
+  folderId?: string;
+  type?: TFolderType;
+}
+
+export const getFolderById = async ({ userId, teamId, folderId, type }: GetFolderByIdOptions) => {
+  let teamMemberRole = null;
+
+  if (teamId !== undefined) {
+    try {
+      const team = await prisma.team.findFirstOrThrow({
+        where: {
+          id: teamId,
+          members: {
+            some: {
+              userId,
+            },
+          },
+        },
+        include: {
+          members: {
+            where: {
+              userId,
+            },
+            select: {
+              role: true,
+            },
+          },
+        },
+      });
+
+      teamMemberRole = team.members[0].role;
+    } catch (error) {
+      throw new AppError(AppErrorCode.NOT_FOUND, {
+        message: 'Team not found',
+      });
+    }
+  }
+
+  const visibilityFilters = match(teamMemberRole)
+    .with(TeamMemberRole.ADMIN, () => ({
+      visibility: {
+        in: [
+          DocumentVisibility.EVERYONE,
+          DocumentVisibility.MANAGER_AND_ABOVE,
+          DocumentVisibility.ADMIN,
+        ],
+      },
+    }))
+    .with(TeamMemberRole.MANAGER, () => ({
+      visibility: {
+        in: [DocumentVisibility.EVERYONE, DocumentVisibility.MANAGER_AND_ABOVE],
+      },
+    }))
+    .otherwise(() => ({ visibility: DocumentVisibility.EVERYONE }));
+
+  const whereClause = {
+    id: folderId,
+    ...(type ? { type } : {}),
+    ...(teamId
+      ? {
+          OR: [
+            { teamId, ...visibilityFilters },
+            { userId, teamId },
+          ],
+        }
+      : { userId, teamId: null }),
+  };
+
+  const folder = await prisma.folder.findFirst({
+    where: whereClause,
+  });
+
+  if (!folder) {
+    throw new AppError(AppErrorCode.NOT_FOUND, {
+      message: 'Folder not found',
+    });
+  }
+
+  return folder;
+};