1 files changed, 57 insertions, 0 deletions
diff --git a/lib/plugins/loadForBook.js b/lib/plugins/loadForBook.js
new file mode 100644
index 0000000..fcfac08
--- /dev/null
+++ b/lib/plugins/loadForBook.js
@@ -0,0 +1,57 @@
+var Promise = require('../utils/promise');
+
+var listForBook = require('./listForBook');
+var listInstalledForBook = require('./listInstalledForBook');
+var loadPlugin = require('./loadPlugin');
+
+
+/**
+    Load a list of plugins in a book
+
+    @param {Book}
+    @return {Promise<Map<String:Plugin>}
+*/
+function loadForBook(book) {
+    var logger = book.getLogger();
+    var requirements = listForBook(book);
+    var requirementsKeys = requirements.keys().toList();
+
+    return listInstalledForBook(book)
+    .then(function(installed) {
+        // Filter out plugins not listed of first level
+        // (aka pre-installed plugins)
+        installed = installed.filter(function(plugin) {
+            return (
+                plugin.getDepth() > 1 ||
+                requirements.has(plugin.getName())
+            );
+        });
+
+        // Sort plugins to match list in book.json
+        installed = installed.sort(function(a, b){
+            return requirementsKeys.indexOf(a.getName()) < requirementsKeys.indexOf(b.getName()) ? -1 : 1;
+        });
+
+        // Log state
+        logger.info.ln(installed.size + ' are installed');
+        if (requirements.size != installed.size) {
+            logger.info.ln(requirements.size + ' explicitly listed');
+        }
+
+        // Verify that all plugins are present
+        var notInstalled = requirementsKeys.filter(function(name) {
+            return !installed.has(name);
+        });
+
+        if (notInstalled.size > 0) {
+            throw new Error('Couldn\'t locate plugins "' + notInstalled.join(', ') + '", Run \'gitbook install\' to install plugins from registry.');
+        }
+
+        return Promise.map(installed, function(plugin) {
+            return loadPlugin(plugin);
+        });
+    });
+}
+
+
+module.exports = loadForBook;