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index.js
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index.js
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var request = require('request');
module.exports = function(title, cb) {
var url = ['http://en.wikipedia.org/w/api.php?',
'action=query&',
'prop=revisions&',
'rvprop=content&',
'rvsection=0&',
'format=json',
'&titles=',
title,'&redirects'].join('');
request(url, function(error, response, content) {
if (error) {
cb(error);
} else {
handleContent(content);
}
});
function handleContent(content) {
content = JSON.parse(content);
if (!content.query) {
cb(null, 'Query Not Found');
return;
}
var json = content.query.pages;
var key = Object.keys(json);
if (key.indexOf('-1') === 0) {
cb(null, 'Page Index Not Found');
return;
} else if (json[key].revisions[0]['*'].indexOf('REDIRECT') > -1) {
cb(null, json[key].revisions[0]['*']);
return;
}
var reg = new RegExp('{{[Ii]nfobox(.|\n)*}}', 'g');
var result = {};
var text = reg.exec(json[key].revisions[0]['*']);
if (!text) {
cb(null, 'Infobox Not Found');
return;
} else {
text = text[0];
// Remove comments.
text = replaceAll('<!--.*-->', '', text);
// Remove reference.
text = replaceAll('<ref.*(/>|>.*</ref>)', '', text);
// Remove all HTML tags.
text = replaceAll('<[^>]+>', '', text);
// Remove page regerences.
text = replaceAll('\{\{refn[^\}\}]*?\}\}', '', text);
// Check each line in text.
if (text) {
text.split('\n|').forEach(function(item) {
var temp = item.split(' = ');
if (temp.length === 2 && temp[1].trim() !== '') {
// Get left part and right part.
var item_name = temp[0].trim(),
item_content = temp[1].trim().split('\n')[0];
// Extract all simple texts inside '[[ ]]',
// such as [[France]], [[Language French|French]], etc.
var find = item_content.match(/\[\[.*?\]\]/g);
if (find) {
find.forEach(function(substring) {
var arr = substring.split('|');
if (arr.length === 1) {
item_content = item_content.replace(substring,
substring.substr(2, substring.length-4));
} else if (arr.length === 2) {
item_content = item_content.replace(substring,
arr[1].substr(0, arr[1].length-2));
}
});
}
// Remove font style
while (item_content.indexOf('{{nowrap|') !== -1) {
item_content = item_content.replace('{{nowrap|', '');
item_content = item_content.replace('}}', '');
}
while (item_content.indexOf('{{small|') !== -1) {
item_content = item_content.replace('{{small|', '');
item_content = item_content.replace('}}', '');
}
if (item_content.indexOf('{{native') !== -1) {
find = item_content.match(/\{\{native[^\}\}]*?\}\}/g);
if (find) {
find.forEach(function(substring) {
var arr = substring.split('|');
item_content = item_content.replace(substring, arr[2]);
});
}
}
// Remove list tag
if (item_content.indexOf('{{unbulleted') !== -1) {
find = item_content.match(/\{\{unbulleted[^\}\}]*?\}\}/g);
if (find) {
find.forEach(function(substring) {
var arr = substring.split('|');
arr.shift();
item_content = item_content.replace(substring, arr.join(',').replace('}}', ''));
});
}
}
// Remove simple vertical list tag
if (item_content.indexOf('{{vunblist') !== -1 &&
item_content.split('{{').length < 3) {
find = item_content.match(/\{\{vunblist[^\}\}]*?\}\}/g);
if (find) {
find.forEach(function(substring) {
var arr = substring.split('|');
arr.shift();
item_content = item_content.replace(substring, arr.join(',').replace('}}', ''));
});
}
}
// Remove horizon list tag
if (item_content.indexOf('{{hlist') !== -1) {
find = item_content.match(/\{\{hlist[^\}\}]*?\}\}/g);
if (find) {
find.forEach(function(substring) {
var arr = substring.split('|');
arr.shift();
item_content = item_content.replace(substring, arr.join(',').replace('}}', ''));
});
}
}
// Remove efn tag
if (item_content.indexOf('{{efn') !== -1) {
find = item_content.match(/\{\{efn[^\}\}]*?\}\}/g);
if (find) {
find.forEach(function(substring) {
item_content = item_content.replace(substring, '');
});
}
}
item_content = replaceAll(' ', ' ', item_content);
item_content = replaceAll('\n\}\}', '', item_content);
result[item_name] = item_content;
}
});
}
cb(null, JSON.stringify(result));
return;
}
}
function replaceAll(find, replace, str) {
if(str) {
return str.replace(new RegExp(find, 'gm'), replace).trim();
}
else {
return null;
}
}
};