Merge pull request #1260 from GitbookIO/move-article

Adds move and remove article modifier.

1 files changed, 37 insertions, 0 deletions

diff --git a/lib/modifiers/summary/removeArticle.js b/lib/modifiers/summary/removeArticle.js
new file mode 100644
index 0000000..8a30d0a
--- /dev/null
+++ b/lib/modifiers/summary/removeArticle.js
@@ -0,0 +1,37 @@
+var is = require('is');
+var mergeAtLevel = require('./mergeAtLevel');
+var indexArticleLevels = require('./indexArticleLevels');
+
+/**
+    Remove an article from a level.
+
+    @param {Summary} summary
+    @param {String|SummaryArticle} level: level to remove
+    @return {Summary}
+*/
+function removeArticle(summary, level) {
+    // Coerce to level
+    level = is.string(level)? level : level.getLevel();
+
+    var parent = summary.getParent(level);
+
+    var articles = parent.getArticles();
+    // Find the index to remove
+    var index = articles.findIndex(function(art) {
+        return art.getLevel() === level;
+    });
+    if (index === -1) {
+        return summary;
+    }
+
+    // Remove from children
+    articles = articles.remove(index);
+    parent = parent.set('articles', articles);
+
+    // Reindex the level from here
+    parent = indexArticleLevels(parent);
+
+    return mergeAtLevel(summary, parent.getLevel(), parent);
+}
+
+module.exports = removeArticle;