init

app/pages/Home/Home.scss

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+.Home {
+  padding: 10px;
+}

app/pages/Home/Home.tsx

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+import * as _ from 'lodash';
+import fs from 'fs';
+import { exec } from 'child_process';
+import React from 'react';
+import { RouteComponentProps } from 'react-router-dom';
+
+import './Home.scss';
+
+interface Props extends RouteComponentProps<any> {}
+
+interface State {
+  path: string;
+}
+
+export default class Home extends React.Component<Props, State> {
+  constructor() {
+    super();
+    this.state = {
+      path: '',
+    };
+  }
+
+  onFolderSelect(e: React.ChangeEvent<HTMLInputElement>) {
+    const path: string = _.get(e, `target.files[0].path`);
+
+    if (path) {
+      this.setState({ path });
+    }
+  }
+
+  async startGame() {
+    const { path } = this.state;
+
+    // set the realm list
+    await this.setRealmList();
+
+    // launch wow
+    exec(`"${path}/WoW.exe"`, (err, output) => {
+      console.log(err);
+      console.log(output);
+    });
+  }
+
+  setRealmList(): Promise<any> {
+    const { path } = this.state;
+
+    return new Promise((resolve, reject) => {
+      fs.writeFile(`${path}/realmlist.wtf`, 'set realmlist logon.elysium-project.org', err => {
+        err ? reject(err) : resolve();
+      });
+    });
+  }
+
+  render() {
+    const { path } = this.state;
+
+    return (
+      <div className="Home">
+        <div>{path}</div>
+        {/* hacky way of adding webkitdirectory to the input */}
+        <input type="file" {...{ webkitdirectory: 'true' }} onChange={this.onFolderSelect.bind(this)} />
+        <div>
+          <button onClick={this.startGame.bind(this)}>Start</button>
+        </div>
+      </div>
+    );
+  }
+}

app/pages/NotFound/NotFound.scss

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+.NotFound {
+  font-size: 20px;
+  text-align: center;
+  padding-top: 200px;
+}

app/pages/NotFound/NotFound.tsx

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+import React from 'react';
+import { RouteComponentProps } from 'react-router-dom';
+
+import './NotFound.scss';
+
+interface Props extends RouteComponentProps<any> {}
+
+interface State {}
+
+export default class NotFound extends React.Component<Props, State> {
+  constructor(props: Props) {
+    super(props);
+  }
+
+  render() {
+    return <div className="NotFound">404 Not Found</div>;
+  }
+}