Merge pull request #1336 from GitbookIO/loading/themes

Load plugins before themes

1 files changed, 45 insertions, 0 deletions

diff --git a/lib/plugins/sortPlugins.js b/lib/plugins/sortPlugins.js
new file mode 100644
index 0000000..6626936
--- /dev/null
+++ b/lib/plugins/sortPlugins.js
@@ -0,0 +1,45 @@
+var Promise = require('../utils/promise');
+
+var THEME_PREFIX = require('../constants/themePrefix');
+var LOADING_ORDER = ['plugin', 'theme'];
+
+/**
+    Returns the type of a plugin given its name
+
+    @return {String}
+*/
+function pluginType(name) {
+    return (name && name.indexOf(THEME_PREFIX) === 0) ? 'theme' : 'plugin';
+}
+
+
+/**
+    Sort the list of installed plugins to match list in book.json
+    The themes should always be loaded after the plugins
+
+    @param {<OrderedMap<String:Plugin>>} plugins
+    @param {<List<String>>} requirementsKeys
+    @return {Promise<OrderedMap<String:Plugin>>}
+*/
+
+function sortPlugins(plugins, requirementsKeys) {
+    return Promise()
+    .then(function() {
+        // Sort plugins to match list in book.json
+        plugins = plugins.sort(function(a, b) {
+            // Get order from book.json
+            var definitionOrder = requirementsKeys.indexOf(a.getName()) < requirementsKeys.indexOf(b.getName());
+
+            // Get order from plugins a and b type
+            var aType = pluginType(a.getName()),
+                bType = pluginType(b.getName()),
+                loadingOrder = LOADING_ORDER.indexOf(aType) < LOADING_ORDER.indexOf(bType);
+
+            return loadingOrder || definitionOrder ? -1 : 1;
+        });
+
+        return plugins;
+    });
+}
+
+module.exports = sortPlugins;
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