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index.js
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index.js
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var fs = require('fs'),
async = require('async'),
config = require('./config'),
common = require('muchmala-common'),
generator = common.puzzleGenerator,
logger = common.logger,
db = common.db,
resources = {};
var NEW_IMAGES_QUEUE = 'new-image';
var NEW_PUZZLES_QUEUE = 'new-puzzle';
var IMAGE_MIN_WIDTH = 500;
var IMAGE_MAX_WIDTH = 2500;
var IMAGE_MIN_HEIGHT = 500;
var IMAGE_MAX_HEIGHT = 2500;
var PUZZLES_DIR = '/puzzles';
var COVERS_DIR = '/covers';
var FRAMES_DIR = '/frames';
function main() {
init(function(err) {
if (err) {
logger.error(err);
return;
}
resources.queue.subscribe(NEW_IMAGES_QUEUE, onNewImage);
logger.info('Ready. Listening for new images.');
});
}
function init(callback) {
attachValidators();
async.series({
queue: function(callback) {
callback(null, new common.queueAdapter(config.queue));
},
imagesStorage: function(callback) {
common.storage.createStorage(config.storage.type, config.storage[config.storage.type], callback);
},
puzzlesStorage: function(callback) {
common.storage.createStorage(config.storage.type, config.storage[config.storage.type], callback);
}
}, function(err, initializedResources) {
resources = initializedResources;
callback();
});
}
function attachValidators() {
generator.validators.append([
generator.validators.getWidthValidator(IMAGE_MIN_WIDTH, IMAGE_MAX_WIDTH),
generator.validators.getHeightValidator(IMAGE_MIN_HEIGHT, IMAGE_MAX_HEIGHT)
]);
}
function onNewImage(options) {
logger.debug(options);
async.waterfall([
function(callback) {
generator.createCovers(options.pieceSize, callback);
},
function(coversData, callback) {
uploadCovers(coversData.resultDir, coversData.size, callback);
},
function(callback) {
generator.createFrame(options.pieceSize, callback);
},
function(frameData, callback) {
uploadFrames(frameData.resultDir, frameData.size, callback);
},
function(callback) {
resources.imagesStorage.get(options.path, callback);
},
function(imagePath, callback) {
generator.createPuzzle(imagePath, options, callback);
},
function(metadata, callback) {
metadata.puzzleId = db.generateId();
metadata.sessionId = options.sessionId;
uploadPuzzle(metadata, function(err) {
callback(err, metadata);
});
},
function(metadata, callback) {
resources.queue.publish(NEW_PUZZLES_QUEUE, metadata);
callback();
}
], function(error) {
if (error) {
resources.queue.publish(NEW_PUZZLES_QUEUE + '-' + options.sessionId, {error: error});
logger.error(error);
} else {
logger.info("Image processed");
}
});
}
function uploadPuzzle(puzzleData, callback) {
var src = puzzleData.resultDir;
var dst = PUZZLES_DIR + '/' + puzzleData.puzzleId;
uploadDir(resources.puzzlesStorage, src, dst, callback);
}
function uploadCovers(src, size, callback) {
var dst = COVERS_DIR + '/' + size;
uploadDir(resources.puzzlesStorage, src, dst, callback);
}
function uploadFrames(src, size, callback) {
var dst = FRAMES_DIR + '/' + size;
uploadDir(resources.puzzlesStorage, src, dst, callback);
}
function uploadDir(storage, src, dst, callback) {
fs.readdir(src, function(error, files) {
if (error) {
return callback(error);
}
async.forEachSeries(files, function(file, callback) {
var srcFile = src + '/' + file;
var dstFile = dst + '/' + file;
logger.debug('Saving ' + srcFile + ' to ' + dstFile);
storage.put(srcFile, dstFile, callback);
}, callback);
});
}
main();