Start API for plugins to access the summary

2 files changed, 45 insertions, 2 deletions

diff --git a/lib/api/encodeGlobal.js b/lib/api/encodeGlobal.js
index 1e7df36..8e3456a 100644
--- a/lib/api/encodeGlobal.js
+++ b/lib/api/encodeGlobal.js
@@ -5,12 +5,14 @@ var fs = require('../utils/fs');
 
 var Plugins = require('../plugins');
 var deprecate = require('./deprecate');
-var encodeConfig = require('./encodeConfig');
-var encodeNavigation = require('./encodeNavigation');
 var fileToURL = require('../output/helper/fileToURL');
 var defaultBlocks = require('../constants/defaultBlocks');
 var gitbook = require('../gitbook');
 
+var encodeConfig = require('./encodeConfig');
+var encodeSummary = require('./encodeSummary');
+var encodeNavigation = require('./encodeNavigation');
+
 /**
     Encode a global context into a JS object
     It's the context for page's hook, etc
@@ -29,6 +31,7 @@ function encodeGlobal(output) {
     var result = {
         log: logger,
         config: encodeConfig(output, book.getConfig()),
+        summary: encodeSummary(output. book.getSummary()),
 
         /**
             Check if the book is a multilingual book
diff --git a/lib/api/encodeSummary.js b/lib/api/encodeSummary.js
new file mode 100644
index 0000000..2bb8d11
--- /dev/null
+++ b/lib/api/encodeSummary.js
@@ -0,0 +1,40 @@
+var encodeSummaryArticle = require('../json/encodeSummaryArticle');
+
+/**
+    Encode summary to provide an API to plugin
+
+    @param {Output} output
+    @param {Config} config
+    @return {Object}
+*/
+function encodeSummary(output, summary) {
+    var result = {
+        /**
+            Iterate over the summary
+
+            @param {Function} iter
+        */
+        walk: function (iter) {
+            summary.getArticle(function(article) {
+                var jsonArticle = encodeSummaryArticle(article, false);
+
+                return iter(jsonArticle);
+            });
+        },
+
+        /**
+            Get an article by its level
+
+            @param {String} level
+            @return {Object}
+        */
+        getArticleByLevel: function(level) {
+            var article = summary.getByLevel(level);
+            return (article? encodeSummaryArticle(article) : undefined);
+        }
+    };
+
+    return result;
+}
+
+module.exports = encodeSummary;