implemented identity, updated session, added 'workings' list

added paginated querying, added 'common'

app/client/hooks/identity.tsx

@@ -1,3 +1,52 @@
-// interface UseIdentityProps {}
+import { ApolloError, ApolloQueryResult, gql, OperationVariables, useQuery } from '@apollo/client';
+import { Identity, IdentityRootQuery } from '@generated/types';
+import { createContext, useContext } from 'react';
 
-// export function useIdentity(props: UseIdentityProps) {}
+export interface IdentityContext {
+  data: Identity;
+  refetch: () => void;
+}
+
+export const IdentityContext = createContext<IdentityContext | null>(null);
+export const IdentityProvider = IdentityContext.Provider;
+
+export function useIdentity(): IdentityContext | null {
+  const identityContext = useContext(IdentityContext);
+  if (identityContext == null) return null;
+  return identityContext;
+}
+
+export function useIdentityQuery({ skip }: { skip?: boolean }): {
+  data: IdentityRootQuery | undefined;
+  loading: boolean;
+  error: ApolloError | undefined;
+  refetch: (
+    variables?: Partial<OperationVariables> | undefined
+  ) => Promise<ApolloQueryResult<IdentityRootQuery>>;
+} {
+  const { data, loading, error, refetch } = useQuery<IdentityRootQuery>(query, {
+    skip
+  });
+  return {
+    data,
+    loading,
+    error,
+    refetch
+  };
+}
+
+const query = gql`
+  query IdentityRoot {
+    identity {
+      id
+      email
+      isDarkTheme
+      user {
+        id
+        username
+        createdAt
+        updatedAt
+      }
+    }
+  }
+`;