1 files changed, 71 insertions, 0 deletions
diff --git a/lib/config/plugins.js b/lib/config/plugins.js
new file mode 100644
index 0000000..43eafdf
--- /dev/null
+++ b/lib/config/plugins.js
@@ -0,0 +1,71 @@
+var _ = require('lodash');
+
+// Default plugins added to each books
+var DEFAULT_PLUGINS = ['highlight', 'search', 'sharing', 'fontsettings'];
+
+// Return true if a plugin is a default plugin
+function isDefaultPlugin(name, version) {
+    return _.contains(DEFAULT_PLUGINS, name);
+}
+
+// Normalize a list of plugins to use
+function normalizePluginsList(plugins, addDefaults) {
+    // Normalize list to an array
+    plugins = _.isString(plugins) ? plugins.split(',') : (plugins || []);
+
+    // Remove empty parts
+    plugins = _.compact(plugins);
+
+    // Divide as {name, version} to handle format like 'myplugin@1.0.0'
+    plugins = _.map(plugins, function(plugin) {
+        if (plugin.name) return plugin;
+
+        var parts = plugin.split('@');
+        var name = parts[0];
+        var version = parts[1];
+        return {
+            'name': name,
+            'version': version, // optional
+            'isDefault': isDefaultPlugin(name, version)
+        };
+    });
+
+    // List plugins to remove
+    var toremove = _.chain(plugins)
+    .filter(function(plugin) {
+        return plugin.name.length > 0 && plugin.name[0] == '-';
+    })
+    .map(function(plugin) {
+        return plugin.name.slice(1);
+    })
+    .value();
+
+    // Merge with defaults
+    if (addDefaults !== false) {
+        _.each(DEFAULT_PLUGINS, function(plugin) {
+            if (_.find(plugins, { name: plugin })) {
+                return;
+            }
+
+            plugins.push({
+                'name': plugin,
+                'isDefault': true
+            });
+        });
+    }
+
+    // Remove plugin that start with '-'
+    plugins = _.filter(plugins, function(plugin) {
+        return !_.contains(toremove, plugin.name) && !(plugin.name.length > 0 && plugin.name[0] == '-');
+    });
+
+    // Remove duplicates
+    plugins = _.uniq(plugins, 'name');
+
+    return plugins;
+}
+
+module.exports = {
+    toList: normalizePluginsList
+};
+