1 files changed, 73 insertions, 0 deletions
diff --git a/packages/gitbook-core/src/models/Location.js b/packages/gitbook-core/src/models/Location.js
new file mode 100644
index 0000000..3b62bef
--- /dev/null
+++ b/packages/gitbook-core/src/models/Location.js
@@ -0,0 +1,73 @@
+const { Record, Map } = require('immutable');
+const querystring = require('querystring');
+
+const DEFAULTS = {
+    pathname: String(''),
+    // Hash without the #
+    hash:     String(''),
+    // If query is a non empty map
+    query:    Map()
+};
+
+class Location extends Record(DEFAULTS) {
+    get search() {
+        const { query } = this;
+        return query.size === 0 ?
+            '' :
+            '?' + querystring.stringify(query.toJS());
+    }
+
+    /**
+     * Convert this location to a string.
+     * @return {String}
+     */
+    toString() {
+
+    }
+
+    /**
+     * Convert this immutable instance to an object
+     * for "history".
+     * @return {Object}
+     */
+    toNative() {
+        return {
+            pathname: this.pathname,
+            hash:     this.hash ? `#${this.hash}` : '',
+            search:   this.search
+        };
+    }
+
+    /**
+     * Convert an instance from "history" to Location.
+     * @param {Object|String} location
+     * @return {Location}
+     */
+    static fromNative(location) {
+        if (typeof location === 'string') {
+            location = { pathname: location };
+        }
+
+        const pathname = location.pathname;
+        let hash = location.hash || '';
+        let search = location.search || '';
+        let query = location.query;
+
+        hash = hash[0] === '#' ? hash.slice(1) : hash;
+        search = search[0] === '?' ? search.slice(1) : search;
+
+        if (query) {
+            query = Map(query);
+        } else {
+            query = Map(querystring.parse(search));
+        }
+
+        return new Location({
+            pathname,
+            hash,
+            query
+        });
+    }
+}
+
+module.exports = Location;