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const ACTION_TYPES = require('./TYPES');
const getPayload = require('../lib/getPayload');
const SUPPORTED = (
typeof window !== 'undefined' &&
window.history && window.history.pushState && window.history.replaceState &&
// pushState isn't reliable on iOS until 5.
!navigator.userAgent.match(/((iPod|iPhone|iPad).+\bOS\s+[1-4]\D|WebApps\/.+CFNetwork)/)
);
let PUSH_ID = 0;
/**
* Generate a new state to be pushed or replaced
* @param {Object}
*/
function genState() {
return {
id: (PUSH_ID++)
};
}
/**
* Push a new url into the navigation
* @param {String} uri
* @return {Action} action
*/
function pushURI(uri) {
return () => {
const state = genState();
if (SUPPORTED) {
window.history.pushState(state, '', uri);
} else {
redirect(uri);
}
};
}
/**
* Replace current state in navigation
* @param {String} uri
* @return {Action} action
*/
function replaceURI(uri) {
return () => {
const state = genState();
if (SUPPORTED) {
window.history.replaceState(state, '', uri);
} else {
redirect(uri);
}
};
}
/**
* Hard redirection
* @param {String} uri
* @return {Action} action
*/
function redirect(uri) {
return () => {
window.location.href = uri;
};
}
/**
* Fetch a new page and update the store accordingly
* @param {String} uri
* @param {Boolean} options.replace
* @return {Action} action
*/
function fetchPage(uri, options = {}) {
const { replace } = options;
return (dispatch, getState) => {
const prevURI = location.href;
dispatch({ type: ACTION_TYPES.PAGE_FETCH_START });
if (replace) {
dispatch(replaceURI(uri));
} else {
dispatch(pushURI(uri));
}
window.fetch(uri, {
credentials: 'include'
})
.then(
response => {
return response.text();
}
)
.then(
html => {
const payload = getPayload(html);
if (!payload) {
throw new Error('No payload found in page');
}
dispatch({ type: ACTION_TYPES.PAGE_FETCH_END, payload });
}
)
.catch(
error => {
dispatch(replaceURI(prevURI));
dispatch(redirect(uri));
dispatch({ type: ACTION_TYPES.PAGE_FETCH_ERROR, error });
}
);
};
}
/**
* Fetch a new article
* @param {SummaryArticle} article
* @return {Action} action
*/
function fetchArticle(article) {
return fetchPage(article.path);
}
/**
* Update anchor for current page
* @param {String} anchor
* @return {Action} action
*/
function updateAnchor(anchor) {
return { type: ACTION_TYPES.PAGE_UPDATE_ANCHOR, anchor };
}
/**
* Update query for current page
* @param {Object|Map} query
* @return {Action} action
*/
function updateQuery(query) {
return { type: ACTION_TYPES.PAGE_UPDATE_QUERY, query };
}
module.exports = {
pushURI,
fetchPage,
fetchArticle,
updateAnchor,
updateQuery
};
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