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DMarby committed Aug 16, 2014
0 parents commit a444d8d3f235c877ac3e3302d04de42388d6d619
Showing with 543 additions and 0 deletions.
  1. +4 −0 .gitignore
  2. +21 −0 LICENSE.md
  3. +4 −0 README.md
  4. +5 −0 config.js
  5. +238 −0 index.js
  6. +21 −0 package.json
  7. +250 −0 public/index.html
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cache
node_modules
images.json
images.json
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The MIT License (MIT)

Copyright (c) {{{year}}} {{{fullname}}}

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
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Unsplash It
===========

Beautiful placeholders using images from [unsplash](http://unsplash.com)
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module.exports = exports = {
folder_path: '../unsplash-downloader/photos',
max_height: 5000,
max_width: 5000
}
238 index.js
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var gm = require('gm');
var fs = require('fs');
var path = require('path');
var sharp = require('sharp');
var filequeue = require('filequeue');
var imagesize = require('imagesize');
var express = require('express')
var config = require('./config');
var pjson = require('./package.json');

var fq = new filequeue(200);
var app = express();
var highestImageId = 0;
try {
var images = require('./images.json');
} catch (e) {
var images = [];
}
if (images.length != 0) {
highestImageId = images.length;
}

var checkParameters = function (params, callback) {
if (!params.width || !params.height || isNaN(parseInt(params.width)) || isNaN(parseInt(params.height))) {
return callback(true, 400, 'Invalid arguments');
}
if (params.width > config.max_height || params.height > config.max_width) {
return callback(true, 413, 'Specified dimensions too large');
}
callback(false);
}

var displayError = function (res, code, message) {
res.status(code);
res.send({ error: message });
}

var findMatchingImage = function (id, callback) {
var matchingImages = images.filter(function (image) { return image.id == id; });
if (matchingImages.length == 0) {
return callback(true);
}
callback(null, matchingImages[0].filename);
}

var getDestination = function (width, height, filePath, prefix) {
return 'cache/' + prefix + path.basename(filePath, path.extname(filePath)) + '-' + width + 'x' + height + path.extname(filePath);
}

var getShortDestination = function (width, height, filePath, prefix) {
return 'cache/' + prefix + width + '^' + height + path.extname(filePath);
}

var getAndCheckDestination = function (width, height, filePath, prefix, shortName, callback) {
var destination = shortName ? getShortDestination(width, height, filePath, prefix) : getDestination(width, height, filePath, prefix);
fs.exists(destination, function (exists) {
callback(exists, destination);
})
}

var imageResize = function (width, height, filePath, destination, callback) {
try {
sharp(filePath).rotate().resize(width, height).crop().progressive().toFile(destination, function (err) {
callback(err, destination);
});
} catch (e) {
callback(e, null);
}
}

var getProcessedImage = function (width, height, filePath, shortName, callback) {
getAndCheckDestination(width, height, filePath, '', shortName, function (exists, destination) {
if (exists) {
return callback(null, destination);
}
imageResize(width, height, filePath, destination, function (err, destination) {
if (err) {
return callback(err);
}
callback(null, destination);
})
})
}

var getProcessedGrayImage = function (width, height, filePath, shortName, callback) {
getAndCheckDestination(width, height, filePath, 'gray-', shortName, function (exists, destination) {
if (exists) {
return callback(null, destination);
}
imageResize(width, height, filePath, destination, function (err, destination) {
if (err) {
return callback(err);
}
gm(destination).colorspace('GRAY').write(destination, function (err) {
if (err) {
return callback(err);
}
callback(null, destination);
})
})
})
}

var endsWith = function (str, suffix) {
return str.indexOf(suffix, str.length - suffix.length) !== -1;
}

var scanDirectory = function (dir, done) {
var results = [];
fs.readdir(dir, function (err, list) {
if (err) {
return done(err);
}
var pending = list.length;
if (!pending) {
return done (null, results);
}
list.forEach(function (file) {
file = path.resolve(dir, file);
fs.stat(file, function (err, stat) {
if (stat && stat.isFile() && !endsWith(file, '.DS_Store')) {
results.push(file);
}
if (!--pending) done(null, results);
});
});
});
};

var imageScan = function () {
scanDirectory(config.folder_path, function (err, results) {
if (err) throw err;
var filteredResults = results.filter(function (filename) {
return images.filter(function (image) { return image.filename == filename; }) == 0;
});
var left = filteredResults.length;
filteredResults.forEach(function (filename) {
var rs = fq.createReadStream(filename);
imagesize(rs, function (err, result) {
if (err) {
return console.log(err);
}

console.log(filename);

result.filename = filename;
result.id = highestImageId++;
images.push(result);

if (!--left) {
fs.writeFile('images.json', JSON.stringify(images), 'utf8', function (err) {});
}
});
});
});
}

app.get('/', function (req, res, next) {
res.sendFile('public/index.html', { root: '.'} );
})

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
}
newImages.push(image);
}
res.jsonp(newImages);
})

app.get('/:width/:height', function (req, res, next) {
checkParameters(req.params, function (err, code, message) {
if (err) {
return displayError(res, code, message);
}

var filePath;
if (req.query.image) {
findMatchingImage(req.query.image, function (err, matchingImage) {
if (err) {
return displayError(res, 400, 'Invalid image id');
}
filePath = matchingImage;
})
} else {
filePath = images[Math.floor(Math.random() * images.length)].filename;
}

getProcessedImage(req.params.width, req.params.height, filePath, (!req.query.image && !req.query.random && req.query.random != ''), function (err, imagePath) {
if (err) {
return displayError(res, 500, 'Something went wrong');
}
res.sendFile(imagePath, { root: '.' });
})
})
})

app.get('/g/:width/:height', function (req, res, next) {
checkParameters(req.params, function (err, code, message) {
if (err) {
return displayError(res, code, message);
}

var filePath;
if (req.query.image) {
findMatchingImage(req.query.image, function (err, matchingImage) {
if (err) {
return displayError(res, 400, 'Invalid image id');
}
filePath = matchingImage;
})
} else {
filePath = images[Math.floor(Math.random() * images.length)].filename;
}

getProcessedGrayImage(req.params.width, req.params.height, filePath, (!req.query.image && !req.query.random && req.query.random != ''), function (err, imagePath) {
if (err) {
return displayError(res, 500, 'Something went wrong');
}
res.sendFile(imagePath, { root: '.' });
})
})
})

app.get('*', function (req, res, next) {
res.status(404);
res.send({ error: 'Resource not found' });
})

imageScan();
app.listen(process.env.PORT || 5000);
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{
"name": "unsplash-it",
"version": "0.0.1",
"main": "index.js",
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1",
"start": "node index.js"
},
"repository": {
"type": "git",
"url": "https://github.com/DMarby/unsplash-it.git"
},
"author": "David Marby <david@dmarby.se> http://dmarby.se",
"dependencies": {
"gm": "^1.16.0",
"filequeue": "^0.5.0",
"imagesize": "^1.0.0",
"express": "^4.8.2",
"sharp": "^0.5.2"
}
}

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