carto/bin/mml2json.js
2012-04-16 15:32:08 -07:00

66 lines
2.0 KiB
JavaScript
Executable File

#!/usr/bin/env node
var xml2js = require('xml2js'),
fs = require('fs');
if (!process.argv[2]) {
console.log('Please specify a XML file.');
process.exit(1);
}
fs.readFile(process.argv[2], 'utf-8', function(err, data) {
if (err) throw err;
// Replace entities.
var entities = {};
var match = data.match(/<!ENTITY([^>]|"([^"]|\\")*")+>/g)
if (match != null) {
match.forEach(function(entity) {
var parts = entity.match(/^<!ENTITY\s+(\w+)\s+"(.+)">$/);
entities['&' + parts[1] + ';'] = parts[2];
});
}
data = data.replace(/&\w+;/g, function(entity) {
return entities[entity];
});
function addAttributes(obj) {
if (obj['@']) for (var key in obj['@']) obj[key] = obj['@'][key];
delete obj['@'];
return obj;
}
function simplifyExternal(obj) {
if (obj.src) return obj.src;
else return obj;
}
var parser = new xml2js.Parser();
parser.addListener('end', function(json) {
console.log(JSON.stringify(json, function(key, value) {
if (!key) {
return addAttributes(value);
}
else if (key === 'Stylesheet') {
if (Array.isArray(value)) return value.map(addAttributes).map(simplifyExternal);
else return [ simplifyExternal(addAttributes(value)) ];
}
else if (key === 'Layer' || key === 'Stylesheet') {
if (Array.isArray(value)) return value.map(addAttributes);
else return [ addAttributes(value) ];
}
else if (key === 'Datasource') {
value = addAttributes(value);
value.Parameter.forEach(function(parameter) {
value[parameter['@'].name] = parameter['#'];
});
delete value.Parameter;
return value;
}
else {
return value;
}
}, 4));
});
parser.parseString(data);
});