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session-desktop
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Code Issues 8 Projects Releases Wiki Activity

Move `writeAttachmentData` into `Attachments`

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Encapsulates all attachment operations that require Node.js / Electron APIs,
e.g. file system access.
pull/1/head
Daniel Gasienica 7 years ago
parent 19a70ad8b8
commit 1c8123ff1a
5 changed files with 143 additions and 98 deletions
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84
app/attachments.js
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@ -0,0 +1,84 @@
const crypto = require('crypto');
const fse = require('fs-extra');
const isArrayBuffer = require('lodash/isArrayBuffer');
const isString = require('lodash/isString');
const path = require('path');
const toArrayBuffer = require('to-arraybuffer');
const PATH = 'attachments';
// getPath :: AbsolutePath -> AbsolutePath
exports.getPath = (userDataPath) => {
if (!isString(userDataPath)) {
throw new TypeError('`userDataPath` must be a string');
}
return path.join(userDataPath, PATH);
};
// ensureDirectory :: AbsolutePath -> IO Unit
exports.ensureDirectory = async (userDataPath) => {
if (!isString(userDataPath)) {
throw new TypeError('`userDataPath` must be a string');
}
await fse.ensureDir(exports.getPath(userDataPath));
};
// readData :: AttachmentsPath ->
// RelativePath ->
// IO (Promise ArrayBuffer)
exports.readData = (root) => {
if (!isString(root)) {
throw new TypeError('`root` must be a path');
}
return async (relativePath) => {
if (!isString(relativePath)) {
throw new TypeError('`relativePath` must be a string');
}
const absolutePath = path.join(root, relativePath);
const buffer = await fse.readFile(absolutePath);
return toArrayBuffer(buffer);
};
};
// writeData :: AttachmentsPath ->
// ArrayBuffer ->
// IO (Promise RelativePath)
exports.writeData = (root) => {
if (!isString(root)) {
throw new TypeError('`root` must be a path');
}
return async (arrayBuffer) => {
if (!isArrayBuffer(arrayBuffer)) {
throw new TypeError('`arrayBuffer` must be an array buffer');
}
const buffer = Buffer.from(arrayBuffer);
const name = exports.createName();
const relativePath = exports.getRelativePath(name);
const absolutePath = path.join(root, relativePath);
await fse.ensureFile(absolutePath);
await fse.writeFile(absolutePath, buffer);
return relativePath;
};
};
// createName :: Unit -> IO String
exports.createName = () => {
const buffer = crypto.randomBytes(32);
return buffer.toString('hex');
};
// getRelativePath :: String -> IO Path
exports.getRelativePath = (name) => {
if (!isString(name)) {
throw new TypeError('`name` must be a string');
}
const prefix = name.slice(0, 2);
return path.join(prefix, name);
};

41
app/types/attachment/write_attachment_data.js
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@ -1,41 +0,0 @@
const crypto = require('crypto');
const fse = require('fs-extra');
const isArrayBuffer = require('lodash/isArrayBuffer');
const isString = require('lodash/isString');
const path = require('path');
// _writeAttachmentData :: AttachmentsPath ->
// ArrayBuffer ->
// IO (Promise Path)
exports.writeAttachmentData = (root) => {
if (!isString(root)) {
throw new TypeError('`root` must be a path');
}
return async (arrayBuffer) => {
if (!isArrayBuffer(arrayBuffer)) {
throw new TypeError('`arrayBuffer` must be an array buffer');
}
const buffer = Buffer.from(arrayBuffer);
const relativePath = exports._getAttachmentPath();
const absolutePath = path.join(root, relativePath);
await fse.ensureFile(absolutePath);
await fse.writeFile(absolutePath, buffer);
return relativePath;
};
};
// _getAttachmentName :: Unit -> IO String
exports._getAttachmentName = () => {
const buffer = crypto.randomBytes(32);
return buffer.toString('hex');
};
// _getAttachmentPath :: Unit -> IO Path
exports._getAttachmentPath = () => {
const name = exports._getAttachmentName();
const prefix = name.slice(0, 2);
return path.join(prefix, name);
};

9
preload.js
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@ -108,6 +108,10 @@
window.autoOrientImage = autoOrientImage;
// ES2015+ modules
const attachmentsPath = Attachments.getPath(app.getPath('userData'));
const readAttachmentData = Attachments.readData(attachmentsPath);
const writeAttachmentData = Attachments.writeData(attachmentsPath);
window.Signal = window.Signal || {};
window.Signal.Logs = require('./js/modules/logs');
window.Signal.OS = require('./js/modules/os');
@ -115,11 +119,10 @@
window.Signal.Crypto = require('./js/modules/crypto');
window.Signal.Migrations = window.Signal.Migrations || {};
const attachmentsPath = Attachments.getPath(app.getPath('userData'));
const { writeAttachmentData } = require('./app/types/attachment/write_attachment_data');
// Injected context functions to keep `Message` agnostic from Electron:
window.Signal.Migrations.context = {
writeAttachmentData: writeAttachmentData(attachmentsPath),
readAttachmentData,
writeAttachmentData,
};
window.Signal.Migrations.V17 = require('./js/modules/migrations/17');

53
test/app/attachments_test.js
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const fse = require('fs-extra');
const isEqual = require('lodash/isEqual');
const path = require('path');
const stringToArrayBuffer = require('string-to-arraybuffer');
const tmp = require('tmp');
const { assert } = require('chai');
const Attachments = require('../../app/attachments');
const PREFIX_LENGTH = 2;
const NUM_SEPARATORS = 1;
const NAME_LENGTH = 64;
const PATH_LENGTH = PREFIX_LENGTH + NUM_SEPARATORS + NAME_LENGTH;
describe('Attachments', () => {
describe('writeData', () => {
let TEMPORARY_DIRECTORY = null;
before(() => {
TEMPORARY_DIRECTORY = tmp.dirSync().name;
});
after(async () => {
await fse.remove(TEMPORARY_DIRECTORY);
});
it('should write file to disk and return path', async () => {
const input = stringToArrayBuffer('test string');
const tempDirectory = path.join(TEMPORARY_DIRECTORY, 'Attachments_writeData');
const outputPath = await Attachments.writeData(tempDirectory)(input);
const output = await fse.readFile(path.join(tempDirectory, outputPath));
assert.lengthOf(outputPath, PATH_LENGTH);
const inputBuffer = Buffer.from(input);
assert.isTrue(isEqual(inputBuffer, output));
});
describe('createName', () => {
it('should return random file name with correct length', () => {
assert.lengthOf(Attachments.createName(), NAME_LENGTH);
});
});
describe('getRelativePath', () => {
it('should return correct path', () => {
const name = '608ce3bc536edbf7637a6aeb6040bdfec49349140c0dd43e97c7ce263b15ff7e';
assert.lengthOf(Attachments.getRelativePath(name), PATH_LENGTH);
});
});
});
});

54
test/app/types/attachment/write_attachment_data_test.js
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@ -1,54 +0,0 @@
const fse = require('fs-extra');
const isEqual = require('lodash/isEqual');
const path = require('path');
const stringToArrayBuffer = require('string-to-arraybuffer');
const tmp = require('tmp');
const { assert } = require('chai');
const {
writeAttachmentData,
_getAttachmentName,
_getAttachmentPath,
} = require('../../../../app/types/attachment/write_attachment_data');
const PREFIX_LENGTH = 2;
const NUM_SEPARATORS = 1;
const NAME_LENGTH = 64;
const PATH_LENGTH = PREFIX_LENGTH + NUM_SEPARATORS + NAME_LENGTH;
describe('writeAttachmentData', () => {
let TEMPORARY_DIRECTORY = null;
before(() => {
TEMPORARY_DIRECTORY = tmp.dirSync().name;
});
after(async () => {
await fse.remove(TEMPORARY_DIRECTORY);
});
it('should write file to disk and return path', async () => {
const input = stringToArrayBuffer('test string');
const tempDirectory = path.join(TEMPORARY_DIRECTORY, 'writeAttachmentData');
const outputPath = await writeAttachmentData(tempDirectory)(input);
const output = await fse.readFile(path.join(tempDirectory, outputPath));
assert.lengthOf(outputPath, PATH_LENGTH);
const inputBuffer = Buffer.from(input);
assert.isTrue(isEqual(inputBuffer, output));
});
describe('_getAttachmentName', () => {
it('should return random file name with correct length', () => {
assert.lengthOf(_getAttachmentName(), NAME_LENGTH);
});
});
describe('_getAttachmentPath', () => {
it('should return correct path', () => {
assert.lengthOf(_getAttachmentPath(), PATH_LENGTH);
});
});
});
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