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const _ = require('lodash');
const getTOC = (pages)=>{
const add1 = (title, page)=>{
res.push({
title : title,
page : page + 1,
children : []
});
};
const add2 = (title, page)=>{
if(!_.last(res)) add1('', page);
_.last(res).children.push({
title : title,
page : page + 1,
children : []
});
};
const add3 = (title, page)=>{
if(!_.last(res)) add1('', page);
if(!_.last(_.last(res).children)) add2('', page);
_.last(_.last(res).children).children.push({
title : title,
page : page + 1,
children : []
});
};
const res = [];
_.each(pages, (page, pageNum)=>{
const lines = page.split('\n');
_.each(lines, (line)=>{
if(_.startsWith(line, '# ')){
const title = line.replace('# ', '');
add1(title, pageNum);
}
if(_.startsWith(line, '## ')){
const title = line.replace('## ', '');
add2(title, pageNum);
}
if(_.startsWith(line, '### ')){
const title = line.replace('### ', '');
add3(title, pageNum);
}
});
});
return res;
};
module.exports = function(props){
const pages = props.brew.text.split('\\page');
const TOC = getTOC(pages);
const markdown = _.reduce(TOC, (r, g1, idx1)=>{
r.push(`- **[${idx1 + 1} ${g1.title}](#p${g1.page})**`);
if(g1.children.length){
_.each(g1.children, (g2, idx2)=>{
r.push(` - [${idx1 + 1}.${idx2 + 1} ${g2.title}](#p${g2.page})`);
if(g2.children.length){
_.each(g2.children, (g3, idx3)=>{
r.push(` - [${idx1 + 1}.${idx2 + 1}.${idx3 + 1} ${g3.title}](#p${g3.page})`);
});
}
});
}
return r;
}, []).join('\n');
return `<div class='toc'>
##### Table Of Contents
${markdown}
</div>\n`;
}; |