From 9ab34d2097fe42d939662658ad833f5bfb580e6e Mon Sep 17 00:00:00 2001
From: toir-bot <toir-bot@greact.ru>
Date: Fri, 24 Apr 2026 13:03:33 +0000
Subject: [PATCH] chore: initial project scaffold: frontend/src/dataProvider.ts

---
 frontend/src/dataProvider.ts | 111 +++++++++++++++++++++++++++++++++++
 1 file changed, 111 insertions(+)
 create mode 100644 frontend/src/dataProvider.ts

diff --git a/frontend/src/dataProvider.ts b/frontend/src/dataProvider.ts
new file mode 100644
index 0000000..97c61c8
--- /dev/null
+++ b/frontend/src/dataProvider.ts
@@ -0,0 +1,111 @@
+import { DataProvider, fetchUtils } from 'react-admin';
+import { getToken } from './authProvider';
+
+const apiUrl = '/api';
+
+const httpClient = (url: string, options: fetchUtils.Options = {}) => {
+  const token = getToken();
+  const headers = new Headers(options.headers);
+  if (token) {
+    headers.set('Authorization', `Bearer ${token}`);
+  }
+  return fetchUtils.fetchJson(url, { ...options, headers });
+};
+
+const buildQuery = (params: Record<string, unknown>): string => {
+  const entries = Object.entries(params).filter(
+    ([, v]) => v !== undefined && v !== null && v !== '',
+  );
+  return entries
+    .map(([k, v]) => `${encodeURIComponent(k)}=${encodeURIComponent(String(v))}`)
+    .join('&');
+};
+
+export const dataProvider: DataProvider = {
+  getList: async (resource, params) => {
+    const { page, perPage } = params.pagination;
+    const { field, order } = params.sort;
+    const skip = (page - 1) * perPage;
+    const take = perPage;
+    const orderBy = JSON.stringify({ [field]: order.toLowerCase() });
+    const where =
+      params.filter && Object.keys(params.filter).length > 0
+        ? JSON.stringify(params.filter)
+        : undefined;
+
+    const query = buildQuery({ skip, take, orderBy, where });
+    const { json } = await httpClient(`${apiUrl}/${resource}?${query}`);
+    return { data: json.data, total: json.total };
+  },
+
+  getOne: async (resource, params) => {
+    const { json } = await httpClient(`${apiUrl}/${resource}/${params.id}`);
+    return { data: json };
+  },
+
+  getMany: async (resource, params) => {
+    const where = JSON.stringify({ id: { in: params.ids } });
+    const query = buildQuery({ skip: 0, take: params.ids.length, where });
+    const { json } = await httpClient(`${apiUrl}/${resource}?${query}`);
+    return { data: json.data };
+  },
+
+  getManyReference: async (resource, params) => {
+    const { page, perPage } = params.pagination;
+    const { field, order } = params.sort;
+    const skip = (page - 1) * perPage;
+    const take = perPage;
+    const orderBy = JSON.stringify({ [field]: order.toLowerCase() });
+    const where = JSON.stringify({
+      ...(params.filter || {}),
+      [params.target]: params.id,
+    });
+    const query = buildQuery({ skip, take, orderBy, where });
+    const { json } = await httpClient(`${apiUrl}/${resource}?${query}`);
+    return { data: json.data, total: json.total };
+  },
+
+  create: async (resource, params) => {
+    const { json } = await httpClient(`${apiUrl}/${resource}`, {
+      method: 'POST',
+      body: JSON.stringify(params.data),
+    });
+    return { data: json };
+  },
+
+  update: async (resource, params) => {
+    const { json } = await httpClient(`${apiUrl}/${resource}/${params.id}`, {
+      method: 'PATCH',
+      body: JSON.stringify(params.data),
+    });
+    return { data: json };
+  },
+
+  updateMany: async (resource, params) => {
+    await Promise.all(
+      params.ids.map((id) =>
+        httpClient(`${apiUrl}/${resource}/${id}`, {
+          method: 'PATCH',
+          body: JSON.stringify(params.data),
+        }),
+      ),
+    );
+    return { data: params.ids };
+  },
+
+  delete: async (resource, params) => {
+    const { json } = await httpClient(`${apiUrl}/${resource}/${params.id}`, {
+      method: 'DELETE',
+    });
+    return { data: json };
+  },
+
+  deleteMany: async (resource, params) => {
+    await Promise.all(
+      params.ids.map((id) =>
+        httpClient(`${apiUrl}/${resource}/${id}`, { method: 'DELETE' }),
+      ),
+    );
+    return { data: params.ids };
+  },
+};