module.exports = function (callback){ 
var fs = require('fs'); 
var path = require('path'); 
var express = require('express'); 
var cors = require('cors'); 
var compress = require('compression'); 
var sharp = require('sharp'); 
var config = require('./config')(); 
var packageinfo = require('./package.json'); 
var imageProcessor = require('./imageProcessor')(sharp, path, config, fs); 
var app = express(); 
sharp.cache(0); 
try { 
var images = require(config.image_store_path); 
} 
catch (e) { 
var images = [] ; 
} 
process.addListener('uncaughtException', function (err){ 
console.log('Uncaught exception: '); 
console.trace(err); 
} 
); 
app.use(compress()); 
app.use(cors()); 
app.use(express["static"] (path.join(__dirname, 'public'), { 
extensions: ['html'] ,
maxAge: '1h'}
)); 
app.get('/info', function (req, res, next){ 
res.jsonp({ 
name: packageinfo.name,
version: packageinfo.version,
author: packageinfo.author}
); 
} 
); 
app.get('/list', function (req, res, next){ 
var newImages = [] ; 
for (var i in images){ 
var item = images[i]; 
var image = { 
format: item.format,
width: item.width,
height: item.height,
filename: path.basename(item.filename),
id: item.id,
author: item.author,
author_url: item.author_url,
post_url: item.post_url}
; 
newImages.push(image); 
} 
res.jsonp(newImages); 
} 
); 
app.get('/:size', function (req, res, next){ 
serveImage(req, res, true , false ); 
} 
); 
app.get('/g/:size', function (req, res, next){ 
serveImage(req, res, true , true ); 
} 
); 
app.get('/:width/:height', function (req, res, next){ 
serveImage(req, res, false , false ); 
} 
); 
app.get('/g/:width/:height', function (req, res, next){ 
serveImage(req, res, false , true ); 
} 
); 
app.all('*', function (req, res, next){ 
res.status(404); 
_AN_Call_send('send', res, { 
error: 'Resource not found'}
); 
} 
); 
var serveImage = function (req, res, square, gray){ 
checkParameters(req.params, req.query, square, function (error, code, message){ 
if (error) { 
return displayError(res, code, message); 
} 
imageProcessor.getWidthAndHeight(req.params, square, function (width, height){ 
var filePath; 
var blur = false ; 
if (req.query.image) { 
var matchingImage = findMatchingImage(req.query.image); 
if (matchingImage) { 
filePath = matchingImage.filename; 
if (parseInt(width) == 0) { 
width = matchingImage.width; 
} 
if (parseInt(height) == 0) { 
height = matchingImage.height; 
} 
} 
 else { 
return displayError(res, 404, 'Invalid image id'); 
} 
} 
 else { 
filePath = images[Math.floor(Math.random() * _AN_Read_length('length', images))].filename; 
} 
var isRandom = (req.query.random || req.query.random === ''); 
imageProcessor.getProcessedImage(parseInt(width), parseInt(height), req.query.gravity, gray, !(!req.query.blur && req.query.blur !== ''), filePath, (!req.query.image && !req.query.random && req.query.random !== ''), function (error, imagePath){ 
if (error) { 
console.log('filePath: ' + filePath); 
console.log('imagePath: ' + imagePath); 
console.log('error: ' + error); 
return displayError(res, 500, 'Something went wrong'); 
} 
res.sendFile(imagePath, { 
maxAge: isRandom? 0: '24h'}
); 
_AN_Call_send('send', process, imagePath); 
} 
); 
} 
); 
} 
); 
} 
; 
var checkParameters = function (params, queryparams, square, callback){ 
if ((square && !params.size) || (square && isNaN(parseInt(params.size))) || (!square && !params.width) || (!square && !params.height) || (!square && isNaN(parseInt(params.width))) || (!square && isNaN(parseInt(params.height))) || (queryparams.gravity && sharp.gravity[queryparams.gravity] != 0 && !sharp.gravity[queryparams.gravity])) { 
return callback(true , 400, 'Invalid arguments'); 
} 
if (params.size > config.max_width || params.size > config.max_height || params.height > config.max_height || params.width > config.max_width) { 
if (queryparams.image) { 
var matchingImage = findMatchingImage(queryparams.image); 
if (matchingImage && params.height == matchingImage.height && params.width == matchingImage.width) { 
return callback(false ); 
} 
} 
return callback(true , 413, 'Specified dimensions too large'); 
} 
callback(false ); 
} 
; 
var findMatchingImage = function (id){ 
var matchingImages = images.filter(function (image){ 
return image.id == id; 
} 
); 
if (!_AN_Read_length('length', matchingImages)) { 
return false ; 
} 
return matchingImages[0]; 
} 
; 
var displayError = function (res, code, message){ 
res.status(code); 
_AN_Call_send('send', res, { 
error: message}
); 
} 
; 
callback(app); 
} 
;