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var is = require('is');
var SummaryArticle = require('../../models/summaryArticle');
var editArticle = require('./editArticle');
var indexArticleLevels = require('./indexArticleLevels');
/**
Get level of parent of an article
@param {String} level
@return {String}
*/
function getParentLevel(level) {
var parts = level.split('.');
return parts.slice(0, -1).join('.');
}
/**
Insert an article in a summary at a specific position
@param {Summary} summary
@param {String|Article} level: level to insert after
@param {Article} article
@return {Summary}
*/
function insertArticle(summary, level, article) {
article = SummaryArticle(article);
level = is.string(level)? level : level.getLevel();
var parentLevel = getParentLevel(level);
if (!parentLevel) {
// todo: insert new part
return summary;
}
// Get parent of the position
var parentArticle = summary.getByLevel(parentLevel);
if (!parentLevel) {
return summary;
}
// Find the index to insert at
var articles = parentArticle.getArticles();
var index = articles.findIndex(function(art) {
return art.getLevel() === level;
});
if (!index) {
return summary;
}
// Insert the article at the right index
articles = articles.insert(index, article);
// Reindex the level from here
parentArticle = parentArticle.set('articles', articles);
parentArticle = indexArticleLevels(parentArticle);
return editArticle(summary, parentLevel, parentArticle);
}
module.exports = insertArticle;
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