feat: added redux & ducks

client/src/features/certificates/duck/slice.ts

@@ -0,0 +1,32 @@
+import { createSlice } from '@reduxjs/toolkit';
+import type { PayloadAction } from '@reduxjs/toolkit';
+import type { CertificateDTO } from './dto';
+
+export interface CertificatesState {
+  loading: boolean;
+  certificates: CertificateDTO[]
+  error: null | string;
+}
+
+const initialState: CertificatesState = {
+  loading: false,
+  certificates: [],
+  error: null,
+};
+
+export const certificateSlice = createSlice({
+  name: 'certificates',
+  initialState,
+  reducers: {
+    setLoading: (state, action: PayloadAction<boolean>) => {
+        state.loading = action.payload
+    },
+    setUsers: (state, action: PayloadAction<CertificateDTO[]>) => {
+        state.certificates = action.payload
+    },
+    setError: (state, action: PayloadAction<string>) => {
+        state.error = action.payload
+    }
+  },
+});
+