var fs = require('fs');
module.exports = function(file_path, callback){
var insertTabs = function(num_tabs) {
var result = '';
for(var i = 0; i < num_tabs; i++){
result += '\t';
}
return result;
}
var emptyHTMLStack = function(html_stack){
var result = '';
while(html_stack.length > 0){
result += html_stack.pop();
}
return result;
}
var popHTMLStack = function(html_stack, current_line_num_tabs, previous_line_num_tabs){
var result = html_stack.pop();
for(var i = previous_line_num_tabs; i > current_line_num_tabs; i--){
result += html_stack.pop();
result += html_stack.pop();
}
return result;
}
var parseFile = function(data, callback){
var previous_line_num_tabs = -1;
var lines = data.split('\n');
var html = '';
var html_stack = [];
for(var i = 0; i < lines.length; i++){
if(lines[i] !== ''){
var tabs_array = lines[i].split('\t');
var current_line_num_tabs = tabs_array.length - 1;
if(current_line_num_tabs > previous_line_num_tabs){
html += insertTabs(current_line_num_tabs * 2) + '\n';
html_stack.push( insertTabs(current_line_num_tabs * 2) + '
\n');
} else if (current_line_num_tabs === previous_line_num_tabs) {
html += html_stack.pop();
}
else if(current_line_num_tabs < previous_line_num_tabs){
html += popHTMLStack(html_stack, current_line_num_tabs, previous_line_num_tabs);
}
html += insertTabs((current_line_num_tabs * 2) + 1) + '\n';
html += insertTabs((current_line_num_tabs * 2) + 2) + tabs_array[tabs_array.length - 1] + '\n';
html_stack.push(insertTabs((current_line_num_tabs * 2) + 1) + '\n');
previous_line_num_tabs = current_line_num_tabs;
}
}
html += emptyHTMLStack(html_stack);
callback(html);
}
fs.readFile(file_path, 'utf8', function(err, data){
if(err){
console.log(err);
} else {
parseFile(data, function(html){
var result = '\n';
result += html;
result += '';
callback(result);
});
}
});
};