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index.js
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index.js
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var easyimg = require('easyimage');
var async = require('async');
var format = require('sprintf-js').sprintf;
var Q = require('q');
var fs = require('fs');
var path = require('path');
var basePath = path.dirname(require.main.filename);
var baseParts = basePath.split('/');
baseParts.splice(-1, 1);
var finalPath = baseParts.join('/');
console.log(finalPath);
var outputTempFilePath = finalPath + '/uploads/temp_user_%d_%d.png';
var outputFilePath = finalPath +'/uploads/circle_user_%d_%d.png';
exports.execute = function execute(imagePath, uniqueId, sizesArray) {
var defer = Q.defer();
getDimensions(imagePath).then(function success(dimensions) {
var sortedSizes = sizesArray.sort(function(a, b){return b-a;});
if (dimensions.width > sortedSizes[0] && dimensions.height > sortedSizes[0]) {
if (dimensions.width !== dimensions.height) {
squareUp(imagePath, sortedSizes[0], dimensions.width, dimensions.height).then(function success(response) {
processImages(imagePath, uniqueId, sortedSizes).then(function success(paths) {
defer.resolve(paths);
}, function error(err) {
defer.reject(err);
});
}, function error(err) {
defer.reject('squaring image failed');
});
} else {
processImages(imagePath, uniqueId, sortedSizes).then(function success(paths) {
defer.resolve(paths);
}, function error(err) {
defer.reject(err);
});
}
} else {
defer.reject("Image is too small to process. Image must be larger than the biggest size in sizesArray");
}
}, function error(err) {
defer.reject(err);
});
return defer.promise;
};
function getDimensions(path) {
return easyimg.info(path).then(
function(file) {
return { width: file.width, height: file.height };
}, function (err) {
return err;
}
);
}
function processImages(path, uniqueId, sizesArray) {
var defer = Q.defer();
var paths = [];
var resizeAndCircularize = function(size) {
var defer = Q.defer();
async.series([
function(callback) {
resize(path, uniqueId, size).then(function success(response){
callback(null, response);
}, function error(err) {
callback(err, null);
});
},
function(callback) {
circularize(path, uniqueId, size).then(function success(response){
callback(null, response);
}, function error(err) {
callback(err, null);
});
}
], function(err, results) {
if (err) {
console.log(err);
defer.reject(err);
} else {
console.log(results);
paths.push(results[1]);
defer.resolve();
}
});
return defer.promise;
};
async.each(sizesArray, function(size, callback) {
console.log('processing image size: ' + size);
resizeAndCircularize(size).then(function success () {
callback();
}, function error (err) {
callback(err);
});
}, function (err) {
if (err) defer.reject(err);
defer.resolve(paths);
});
return defer.promise;
}
var squareUp = function squareUp(path, size, originalWidth, originalHeight) {
console.log('square up image');
return easyimg.crop({
src: path,
width: size,
height: size,
x: originalWidth/2,
y: originalHeight/2
}).then(function success (path) {
return path;
}, function error (err) {
return err;
});
};
var resize = function resize(path, uniqueId, size) {
console.log('cropping: ' + size);
var tempPath = format(outputTempFilePath, uniqueId, size);
return easyimg.exec('convert ' + path + ' -resize ' +
(size) + 'x' + (size) + '^ -gravity center -crop ' +
(size + 2) + 'x' + (size + 2) + '+0+0 +repage ' + tempPath).then(function success () {
return tempPath;
}, function error (err) {
return err;
});
};
var circularize = function circularize(path, uniqueId, size) {
console.log('circularizing: ' + size);
var radius = (size/2) - 1;
var circleSize = format('%1$d,%1$d %1$d 0', radius);
var tempPath = format(outputTempFilePath, uniqueId, size);
var finalPath = format(outputFilePath, uniqueId, size);
return easyimg.exec('convert ' + tempPath + ' \\( -size ' + (size) + 'x' + (size) +
' xc:none -fill white -draw \'circle ' + circleSize + '\' \\) ' +
'-compose copy_opacity -composite ' + finalPath).then(function success () {
return finalPath;
}, function error (err) {
return err;
});
};