[examples] Add a Gatsby example

examples/gatsby/.gitignore

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+/public/
+/.cache/

examples/gatsby/README.md

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+# Gatsby example
+
+## How to use
+
+Download the example [or clone the repo](https://github.com/mui-org/material-ui):
+
+```bash
+curl https://codeload.github.com/mui-org/material-ui/tar.gz/v1-beta | tar -xz --strip=2  material-ui-1-beta/examples/gatsby
+cd gatsby
+```
+
+Install it and run:
+
+```bash
+npm install
+npm run develop
+```
+
+## The idea behind the example
+
+[Gatsby](https://github.com/gatsbyjs/gatsby) is a static site generator for React.

examples/gatsby/gatsby-config.js

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+module.exports = {
+  siteMetadata: {
+    title: 'Gatsby Default Starter',
+  },
+};

examples/gatsby/gatsby-ssr.js

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+/* eslint-disable react/no-danger */
+
+import React from 'react';
+import { renderToString } from 'react-dom/server';
+import { JssProvider } from 'react-jss';
+import getPageContext from './src/getPageContext';
+
+exports.replaceRenderer = ({ bodyComponent, replaceBodyHTMLString, setHeadComponents }) => {
+  // Get the context of the page to collected side effects.
+  const pageContext = getPageContext();
+
+  const bodyHTML = renderToString(
+    <JssProvider
+      registry={pageContext.sheetsRegistry}
+      generateClassName={pageContext.generateClassName}
+    >
+      {React.cloneElement(bodyComponent, {
+        pageContext,
+      })}
+    </JssProvider>,
+  );
+
+  replaceBodyHTMLString(bodyHTML);
+  setHeadComponents([
+    <style
+      type="text/css"
+      id="server-side-jss"
+      key="server-side-jss"
+      dangerouslySetInnerHTML={{ __html: pageContext.sheetsRegistry.toString() }}
+    />,
+  ]);
+};

examples/gatsby/package.json

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+{
+  "name": "gatsby",
+  "version": "1.0.0",
+  "private": true,
+  "dependencies": {
+    "gatsby": "latest",
+    "jss": "latest",
+    "material-ui": "next",
+    "prop-types": "latest",
+    "react": "latest",
+    "react-dom": "latest",
+    "react-jss": "latest"
+  },
+  "scripts": {
+    "develop": "gatsby develop",
+    "build": "gatsby build"
+  }
+}

examples/gatsby/src/getPageContext.js

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+/* eslint-disable no-underscore-dangle */
+
+import { SheetsRegistry } from 'jss';
+import { createMuiTheme, createGenerateClassName } from 'material-ui/styles';
+import purple from 'material-ui/colors/purple';
+import green from 'material-ui/colors/green';
+
+// A theme with custom primary and secondary color.
+// It's optional.
+const theme = createMuiTheme({
+  palette: {
+    primary: purple,
+    secondary: green,
+  },
+});
+
+function createPageContext() {
+  return {
+    theme,
+    // This is needed in order to deduplicate the injection of CSS in the page.
+    sheetsManager: new Map(),
+    // This is needed in order to inject the critical CSS.
+    sheetsRegistry: new SheetsRegistry(),
+    // The standard class name generator.
+    generateClassName: createGenerateClassName(),
+  };
+}
+
+export default function getPageContext() {
+  // Make sure to create a new context for every server-side request so that data
+  // isn't shared between connections (which would be bad).
+  if (!process.browser) {
+    return createPageContext();
+  }
+
+  // Reuse context on the client-side.
+  if (!global.__INIT_MATERIAL_UI__) {
+    global.__INIT_MATERIAL_UI__ = createPageContext();
+  }
+
+  return global.__INIT_MATERIAL_UI__;
+}

examples/gatsby/src/pages/index.js

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+import React from 'react';
+import PropTypes from 'prop-types';
+import Button from 'material-ui/Button';
+import Dialog, {
+  DialogTitle,
+  DialogContent,
+  DialogContentText,
+  DialogActions,
+} from 'material-ui/Dialog';
+import Typography from 'material-ui/Typography';
+import { withStyles } from 'material-ui/styles';
+import withRoot from '../withRoot';
+
+const styles = theme => ({
+  root: {
+    textAlign: 'center',
+    paddingTop: theme.spacing.unit * 20,
+  },
+});
+
+class Index extends React.Component {
+  state = {
+    open: false,
+  };
+
+  handleClose = () => {
+    this.setState({
+      open: false,
+    });
+  };
+
+  handleClick = () => {
+    this.setState({
+      open: true,
+    });
+  };
+
+  render() {
+    const { classes } = this.props;
+    const { open } = this.state;
+
+    return (
+      <div className={classes.root}>
+        <Dialog open={open} onClose={this.handleClose}>
+          <DialogTitle>Super Secret Password</DialogTitle>
+          <DialogContent>
+            <DialogContentText>1-2-3-4-5</DialogContentText>
+          </DialogContent>
+          <DialogActions>
+            <Button color="primary" onClick={this.handleClose}>
+              OK
+            </Button>
+          </DialogActions>
+        </Dialog>
+        <Typography type="display1" gutterBottom>
+          Material-UI
+        </Typography>
+        <Typography type="subheading" gutterBottom>
+          example project
+        </Typography>
+        <Button raised color="accent" onClick={this.handleClick}>
+          Super Secret Password
+        </Button>
+      </div>
+    );
+  }
+}
+
+Index.propTypes = {
+  classes: PropTypes.object.isRequired,
+};
+
+export default withRoot(withStyles(styles)(Index));

examples/gatsby/src/withRoot.js

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+import React from 'react';
+import PropTypes from 'prop-types';
+import { MuiThemeProvider } from 'material-ui/styles';
+import Reboot from 'material-ui/Reboot';
+import getPageContext from './getPageContext';
+
+function withRoot(Component) {
+  class WithRoot extends React.Component {
+    componentWillMount() {
+      this.pageContext = this.props.pageContext || getPageContext();
+    }
+
+    componentDidMount() {
+      // Remove the server-side injected CSS.
+      const jssStyles = document.querySelector('#jss-server-side');
+      if (jssStyles && jssStyles.parentNode) {
+        jssStyles.parentNode.removeChild(jssStyles);
+      }
+    }
+
+    pageContext = null;
+
+    render() {
+      // MuiThemeProvider makes the theme available down the React tree thanks to React context.
+      return (
+        <MuiThemeProvider
+          theme={this.pageContext.theme}
+          sheetsManager={this.pageContext.sheetsManager}
+        >
+          {/* Reboot kickstart an elegant, consistent, and simple baseline to build upon. */}
+          <Reboot />
+          <Component {...this.props} />
+        </MuiThemeProvider>
+      );
+    }
+  }
+
+  WithRoot.propTypes = {
+    pageContext: PropTypes.object,
+  };
+
+  return WithRoot;
+}
+
+export default withRoot;

examples/nextjs/README.md

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-[![Deploy to now](https://deploy.now.sh/static/button.svg)](https://deploy.now.sh/?repo=https://github.com/mui-org/material-ui/tree/v1-beta/examples/nextjs)
-
 # Next.js example
 
 ## How to use