Refact/project (#189)

* refactor: cleanup project entry point
* refactor: remove unused
* refactor: folder restructure

client/src/common/context/AppContext.jsx

@@ -0,0 +1,56 @@
+import React, { createContext, useCallback, useEffect, useState } from 'react';
+
+import { APP_SETTINGS } from '../api/apiConstants';
+import { getSettings } from '../api/ontimeApi';
+import { useFetch } from '../hooks/useFetch';
+
+export const AppContext = createContext({
+  auth: false,
+  data: {
+    pinCode: null,
+  },
+});
+
+export const AppContextProvider = ({ children }) => {
+  const [auth, setAuth] = useState(true);
+  const { data } = useFetch(APP_SETTINGS, getSettings);
+
+  useEffect(() => {
+    if (data == null) return;
+    const previousEntry = sessionStorage.getItem('ontime-entry');
+    if (previousEntry) {
+      if (previousEntry === data?.pinCode) {
+        setAuth(true);
+      } else {
+        sessionStorage.removeItem('ontime-entry')
+      }
+    } else if (data?.pinCode == null || data?.pinCode === '') {
+      setAuth(true);
+    } else {
+      setAuth(false);
+    }
+  }, [data]);
+
+  /**
+   * Validates a pincode
+   * @return boolean - whether the pin is valid
+   */
+  const validate = useCallback(
+    (pin) => {
+      let correct;
+      if (data?.pinCode == null || data?.pinCode === '') {
+        correct = true;
+      } else {
+        correct = pin === data?.pinCode;
+      }
+      if (correct) {
+        sessionStorage.setItem('ontime-entry', pin);
+      }
+      setAuth(correct);
+      return correct;
+    },
+    [data]
+  );
+
+  return <AppContext.Provider value={{ auth, validate }}>{children}</AppContext.Provider>;
+};