module.exports = function (docStr) {

docStr = docStr.trim();

const hasYamlConfig = docStr.startsWith('---');

const docArr = docStr.split('\n');

let title = null;

let titleIndex = null;

let yamlEndIndex = null;

let i = hasYamlConfig ? 1 : 0;

while (i < docArr.length) {

const line = docArr[i];

// yaml end

if (line.startsWith('---')) {

yamlEndIndex = i;

}

// title

if (line.startsWith('# ') && titleIndex === null) {

title = line.replace('# ', '');

titleIndex = i;

}

i += 1;

}

if (titleIndex === null && yamlEndIndex !== null) {

titleIndex = yamlEndIndex;

}

return {

hasYamlConfig,

title,

yamlConfig: hasYamlConfig ? docArr.slice(1, yamlEndIndex) : [],

body: docArr.slice(titleIndex === null ? titleIndex : titleIndex + 1),

};

};