feat: add login mutation

packages/backend/src/graphql/mutations/login.ts

@@ -0,0 +1,30 @@
+import { GraphQLString, GraphQLNonNull } from 'graphql';
+import User from '../../models/user';
+import userType from '../types/user';
+
+type Params = {
+  email: string,
+  password: string
+}
+const loginResolver = async (params: Params) => {
+  const user = await User.query().findOne({
+    email: params.email,
+  });
+
+  if (user && await user.login(params.password)) {
+    return user;
+  }
+
+  throw new Error('User could not be found.')
+}
+
+const login = {
+  type: userType,
+  args: {
+    email: { type: GraphQLNonNull(GraphQLString) },
+    password: { type: GraphQLNonNull(GraphQLString) }
+  },
+  resolve: (_: any, params: any) => loginResolver(params)
+};
+
+export default login;

packages/backend/src/graphql/root-mutation.ts

@@ -9,6 +9,7 @@ import createFlow from './mutations/create-flow';
 import updateFlow from './mutations/update-flow';
 import createStep from './mutations/create-step';
 import executeStep from './mutations/execute-step';
+import login from './mutations/login';
 
 const rootMutation = new GraphQLObjectType({
   name: 'Mutation',
@@ -22,7 +23,8 @@ const rootMutation = new GraphQLObjectType({
     createFlow,
     updateFlow,
     createStep,
-    executeStep
+    executeStep,
+    login
   }
 });
 

packages/backend/src/graphql/types/user.ts

@@ -0,0 +1,13 @@
+import { GraphQLObjectType, GraphQLString, GraphQLList, GraphQLInt } from 'graphql';
+
+const userType = new GraphQLObjectType({
+  name: 'User',
+  fields: {
+    id: { type: GraphQLString },
+    email: { type: GraphQLString },
+    createdAt: { type: GraphQLString },
+    updatedAt: { type: GraphQLString }
+  }
+})
+
+export default userType;

packages/backend/src/models/user.ts

@@ -32,6 +32,10 @@ class User extends Base {
     }
   })
 
+  login(password: string) {
+    return bcrypt.compare(password, this.password);
+  }
+
   async generateHash() {
     this.password = await bcrypt.hash(this.password, 10);
   }