gatsby
Version:
Blazing fast modern site generator for React
50 lines (49 loc) • 1.72 kB
JavaScript
;
const isEqual = require(`lodash/isEqual`);
const {
emitter,
store
} = require(`../../redux`);
const {
actions
} = require(`../../redux/actions`);
const originalStatusPageByStatus = {};
const originalStatusPageByPath = {};
emitter.on(`CREATE_PAGE`, action => {
// Copy /404/ to /404.html and /500/ to /500.html. Many static site hosts expect
// site 404 pages to be named this. In addition, with Rendering Engines there might
// be runtime errors which would fallback to "/500.html" page.
// https://www.gatsbyjs.com/docs/how-to/adding-common-features/add-404-page/
const result = /^\/?(404|500)\/?$/.exec(action.payload.path);
if (result && result.length > 1) {
const status = result[1];
const originalPage = originalStatusPageByStatus[status];
const pageToStore = {
path: action.payload.path,
component: action.payload.component,
context: action.payload.context,
slices: action.payload.slices,
status
};
if (!originalPage || !isEqual(originalPage, pageToStore)) {
originalStatusPageByStatus[status] = pageToStore;
originalStatusPageByPath[action.payload.path] = pageToStore;
store.dispatch(actions.createPage({
...pageToStore,
path: `/${status}.html`
}, action.plugin, action));
}
}
});
emitter.on(`DELETE_PAGE`, action => {
const storedPage = originalStatusPageByPath[action.payload.path];
if (storedPage) {
store.dispatch(actions.deletePage({
...storedPage,
path: `/${storedPage.status}.html`
}));
originalStatusPageByPath[action.payload.path] = null;
originalStatusPageByStatus[storedPage.status] = null;
}
});
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