1 files changed, 188 insertions, 0 deletions
diff --git a/packages/gitbook-core/src/actions/history.js b/packages/gitbook-core/src/actions/history.js
new file mode 100644
index 0000000..1c33f4a
--- /dev/null
+++ b/packages/gitbook-core/src/actions/history.js
@@ -0,0 +1,188 @@
+const ACTION_TYPES = require('./TYPES');
+const getPayload = require('../lib/getPayload');
+const Location = require('../models/Location');
+
+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)/)
+);
+
+/**
+ * Initialize the history
+ */
+function activate() {
+    return (dispatch, getState) => {
+        dispatch({
+            type: ACTION_TYPES.HISTORY_ACTIVATE,
+            listener: (location) => {
+                location = Location.fromNative(location);
+                const prevLocation = getState().history.location;
+
+                // Fetch page if required
+                if (!prevLocation || location.pathname !== prevLocation.pathname) {
+                    dispatch(fetchPage(location.pathname));
+                }
+
+                // Signal location to listener
+                dispatch(emit());
+
+                // Update the location
+                dispatch({
+                    type: ACTION_TYPES.HISTORY_UPDATE,
+                    location
+                });
+            }
+        });
+
+        // Trigger for existing listeners
+        dispatch(emit());
+    };
+}
+
+/**
+ * Emit current location
+ * @param {List|Array<Function>} to?
+ */
+function emit(to) {
+    return (dispatch, getState) => {
+        const { listeners, client } = getState().history;
+
+        if (!client) {
+            return;
+        }
+
+        const location = Location.fromNative(client.location);
+
+        to = to || listeners;
+
+        to.forEach(handler => {
+            handler(location, dispatch, getState);
+        });
+    };
+}
+
+/**
+ * Cleanup the history
+ */
+function deactivate() {
+    return { type: ACTION_TYPES.HISTORY_DEACTIVATE };
+}
+
+/**
+ * Push a new url into the history
+ * @param {String|Location} location
+ * @return {Action} action
+ */
+function push(location) {
+    return (dispatch, getState) => {
+        const { client } = getState().history;
+        location = Location.fromNative(location);
+
+        if (SUPPORTED) {
+            client.push(location.toNative());
+        } else {
+            redirect(location.toString());
+        }
+    };
+}
+
+/**
+ * Replace current state in history
+ * @param {String|Location} location
+ * @return {Action} action
+ */
+function replace(location) {
+    return (dispatch, getState) => {
+        const { client } = getState().history;
+        location = Location.fromNative(location);
+
+        if (SUPPORTED) {
+            client.replace(location.toNative());
+        } else {
+            redirect(location.toString());
+        }
+    };
+}
+
+/**
+ * Hard redirection
+ * @param {String} uri
+ * @return {Action} action
+ */
+function redirect(uri) {
+    return () => {
+        window.location.href = uri;
+    };
+}
+
+/**
+ * Listen to url change
+ * @param {Function} listener
+ * @return {Action} action
+ */
+function listen(listener) {
+    return (dispatch, getState) => {
+        dispatch({ type: ACTION_TYPES.HISTORY_LISTEN, listener });
+
+        // Trigger for existing listeners
+        dispatch(emit([ listener ]));
+    };
+}
+
+/**
+ * Fetch a new page and update the store accordingly
+ * @param {String} pathname
+ * @return {Action} action
+ */
+function fetchPage(pathname) {
+    return (dispatch, getState) => {
+        dispatch({ type: ACTION_TYPES.PAGE_FETCH_START });
+
+        window.fetch(pathname, {
+            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(redirect(pathname));
+                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);
+}
+
+module.exports = {
+    activate,
+    deactivate,
+    listen,
+    push,
+    replace,
+    fetchPage,
+    fetchArticle
+};