const fs = require('fs') | |
class FeatureWriterStream { | |
constructor (file) { | |
this.file = file | |
this.stream = fs.createWriteStream(file) | |
this.stream.write('{"type":"FeatureCollection","features":[') | |
this.numFeatures = 0 | |
} | |
add (stringifiedFeature) { | |
if (this.numFeatures > 0) { | |
this.stream.write(',') | |
} | |
this.stream.write(stringifiedFeature) | |
this.numFeatures++ | |
} | |
end (cb) { | |
console.log(`Closing out file ${this.file}`) | |
this.stream.end(']}', cb) | |
} | |
} | |
module.exports = FeatureWriterStream |