Complete method getByPath of Summary

lib/models/summary.js

@@ -24,7 +24,9 @@ Summary.prototype.getParts = function() {
     @return {Part|Article}
 */
 Summary.prototype.getByLevel = function(level) {
-    return SummaryArticle.getByLevel(this, level, 'getParts');
+    return SummaryArticle.findArticle(this, function(article) {
+        return (article.getLevel() === level);
+    }, 'getParts');
 };
 
 /**
@@ -34,9 +36,9 @@ Summary.prototype.getByLevel = function(level) {
     @return {Part|Article}
 */
 Summary.prototype.getByPath = function(filePath) {
-    // todo
-
-    return undefined;
+    return SummaryArticle.findArticle(this, function(article) {
+        return (article.getPath() === filePath);
+    }, 'getParts');
 };
 
 /**

lib/models/summaryArticle.js

@@ -38,16 +38,6 @@ SummaryArticle.prototype.getDepth = function() {
     return this.getLevel().split('.').length;
 };
 
-/**
-    Return an article by its level
-
-    @param {String} level
-    @return {Article}
-*/
-SummaryArticle.prototype.getByLevel = function(level) {
-    return SummaryArticle.getByLevel(this, level);
-};
-
 /**
     Get path (without anchor) to the pointing file
 
@@ -131,31 +121,27 @@ SummaryArticle.create = function(def, level) {
 
 
 /**
-    Return an article by its level
+    Find an article from a base one
 
     @param {Article|Part} base
-    @param {String} level
+    @param {Function(article)} iter
     @param {String} method
     @return {Article}
 */
-SummaryArticle.getByLevel = function(base, level, method) {
+SummaryArticle.findArticle = function(base, iter, method) {
     method = method || 'getArticles';
     var articles = base[method]();
-    var levelParts = level.split('.');
-    var baseLevel = levelParts.shift();
 
-    var result = articles.find(function(a) {
-        return a.getLevel() === baseLevel;
-    });
+    return articles.reduce(function(result, article) {
+        if (result) return result;
 
-    if (!result) {
-        return undefined;
-    }
-    if (levelParts.length === 0) {
-        return result;
-    }
+        if (iter(article)) {
+            return article;
+        }
 
-    return SummaryArticle.getByLevel(result, levelParts.join('.'));
+        return SummaryArticle.findArticle(article, iter);
+    }, null);
 };
 
+
 module.exports = SummaryArticle;

lib/models/summaryPart.js

@@ -24,16 +24,6 @@ SummaryPart.prototype.getArticles = function() {
     return this.get('articles');
 };
 
-/**
-    Return an article by its level
-
-    @param {String} level
-    @return {Article}
-*/
-SummaryPart.prototype.getByLevel = function(level) {
-    return SummaryArticle.getByLevel(this, level);
-};
-
 /**
     Create a SummaryPart