1 files changed, 80 insertions, 0 deletions
diff --git a/history/modules/LocationUtils.js b/history/modules/LocationUtils.js
new file mode 100644
index 0000000..27cb0f8
--- /dev/null
+++ b/history/modules/LocationUtils.js
@@ -0,0 +1,80 @@
+import resolvePathname from 'resolve-pathname';
+import valueEqual from 'value-equal';
+
+import { parsePath } from './PathUtils.js';
+
+export function createLocation(path, state, key, currentLocation) {
+  let location;
+  if (typeof path === 'string') {
+    // Two-arg form: push(path, state)
+    location = parsePath(path);
+    location.state = state;
+  } else {
+    // One-arg form: push(location)
+    location = { ...path };
+
+    if (location.pathname === undefined) location.pathname = '';
+
+    if (location.search) {
+      if (location.search.charAt(0) !== '?')
+        location.search = '?' + location.search;
+    } else {
+      location.search = '';
+    }
+
+    if (location.hash) {
+      if (location.hash.charAt(0) !== '#') location.hash = '#' + location.hash;
+    } else {
+      location.hash = '';
+    }
+
+    if (state !== undefined && location.state === undefined)
+      location.state = state;
+  }
+
+  try {
+    location.pathname = decodeURI(location.pathname);
+  } catch (e) {
+    if (e instanceof URIError) {
+      throw new URIError(
+        'Pathname "' +
+          location.pathname +
+          '" could not be decoded. ' +
+          'This is likely caused by an invalid percent-encoding.'
+      );
+    } else {
+      throw e;
+    }
+  }
+
+  if (key) location.key = key;
+
+  if (currentLocation) {
+    // Resolve incomplete/relative pathname relative to current location.
+    if (!location.pathname) {
+      location.pathname = currentLocation.pathname;
+    } else if (location.pathname.charAt(0) !== '/') {
+      location.pathname = resolvePathname(
+        location.pathname,
+        currentLocation.pathname
+      );
+    }
+  } else {
+    // When there is no prior location and pathname is empty, set it to /
+    if (!location.pathname) {
+      location.pathname = '/';
+    }
+  }
+
+  return location;
+}
+
+export function locationsAreEqual(a, b) {
+  return (
+    a.pathname === b.pathname &&
+    a.search === b.search &&
+    a.hash === b.hash &&
+    a.key === b.key &&
+    valueEqual(a.state, b.state)
+  );
+}