Filesystem

Each Loop is provided with their own blank "working" directory for this Aptitude, which is what relative paths resolve to. Loops are free to do anything they want to any file/directory inside of this working directory.
Loops cannot access other Loops' working directories.
This working directory persists across Loop version updates.
API
Example
Permissions
copy
Copies a file from one location to another.
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import { filesystem } from '@oliveai/ldk';
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​
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const SOURCE_PATH = '/var/log/system.log';
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const DESTINATION_PATH = '/Users/username/system.log';
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​
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// Check to make sure the system log exists
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const systemLogExists = await filesystem.exists(SOURCE_PATH);
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​
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// Copy the system log to the user folder
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if (systemLogExists) {
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    await filesystem.copy(SOURCE_PATH, DESTINATION_PATH);
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}
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dir
Returns all files in the specified directory.
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import { filesystem } from '@oliveai/ldk';
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​
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// Get all files in the /var/log directory
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const allLogs = await filesystem.dir('/var/log');
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​
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/*
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allLogs:
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[
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  {
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    "name": "foo.txt",
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    "size": 476,
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    "mode": "-rw-r--r--",
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    "modTime": "2021-10-18T12:46:16.234535644-04:00",
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    "isDir": false
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  },
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  {
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    "name": "bar",
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    "size": 96,
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    "mode": "drwxr-xr-x",
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    "modTime": "2021-09-19T05:25:54.491321266-04:00",
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    "isDir": true
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  },
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  ...
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]
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*/
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exists
Return true if a file or directory exists at the specified location.
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import { filesystem } from '@oliveai/ldk';
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​
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// Check to make sure /var/log directory exists
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const logDirExists = await filesystem.exists('/var/log');
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// logDirExists === true
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​
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// Check to make sure /var/log/system.log file exists
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const sysLogExists = await filesystem.exists('/var/log/system.log');
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// sysLogExists === true
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​
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// Check to make sure /var/log/fakeDirectory directory exists
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const fakeDirExists = await filesystem.exists('/var/log/fakeDirectory');
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// fakeDirExists === false
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join
Join joins an array of path elements into a single path, separating them with an OS specific Separator. Empty elements are ignored. The result is cleaned. However, if the argument list is empty or all its elements are empty, Join returns an empty string. On Windows, the result will only be a UNC path if the first non-empty element is a UNC path.
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import { filesystem } from '@oliveai/ldk';
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​
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// Create path string for a local text file that works on both 
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// Windows and Unix-based systems
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const testDirectory = await filesystem.join(['testDirectory', 'foo.txt']);
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// Windows: testDirectory == testDirectory\foo.txt
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// macOS: testDirectory == testDirectory/foo.txt
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listenDir
Listen for changes to the contents of the directory.
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import { filesystem } from '@oliveai/ldk';
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​
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// The path of the directory where we want to listen for changes
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const PATH = '/var/log';
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// The callback function that runs when a change is detected
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const callback = (fileEvent) => {
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    // When a file or directory are added, opened, or updated:
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    /*
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    fileEvent:
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    {
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      "info": {
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        "name": "foo.log",
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        "size": 17,
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        "mode": "-rwxr-xr-x",
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        "modTime": "2021-10-27T22:14:24.596962-04:00",
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        "isDir": false
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      },
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      "action": "Create" or "Chmod"
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    }
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    */
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    // When a file or directory is renamed or removed, it will fire off 
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    // the above fileEvent then another one afterward:
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    /*
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    fileEvent:
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    {
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      "action": "Rename" or "Remove",
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      "name": "test.log" // old file name
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    }
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    */
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}
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​
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const directoryListener = await filesystem.listenDir(PATH, callback);
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​
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// Cancel the listener
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directoryListen.cancel();
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listenFile
Listen for changes to a specific file.
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import { filesystem } from '@oliveai/ldk';
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​
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// The path of the file we want to listen to for changes
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const PATH = '/var/log/system.log';
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// The callback function that runs when a change is detected
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const callback = (fileEvent) => {
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    // When the file is opened or updated:
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    /*
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    fileEvent:
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    {
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      "info": {
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        "name": "system.log",
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        "size": 14592,
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        "mode": "-rwxr-xr-x",
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        "modTime": "2021-10-27T22:31:24.215811-04:00",
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        "isDir": false
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      },
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      "action": "Chmod"
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    }
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    */
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    // When the file is renamed or removed, it will fire off 
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    // the above fileEvent then another one afterward:
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    /*
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    fileEvent:
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    {
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      "action": "Rename" or "Remove",
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      "name": "system.log" // old file name
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    }
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    */
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}
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​
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const fileListener = await filesystem.listenFile(PATH, callback);
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​
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// Cancel the listener
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fileListener.cancel();
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makeDir
Makes a directory at the specified location.
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import { filesystem } from '@oliveai/ldk';
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​
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// The path of the directory we want to create
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const DESTINATION_PATH = '/var/log/backups';
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​
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// The permissions we want to give the directory, in octal format
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// https://www.linode.com/docs/guides/modify-file-permissions-with-chmod/
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const WRITE_MODE = 0o750
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​
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// Check to make sure the directory doesn't already exist
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const directoryExists = await filesystem.exists(DESTINATION_PATH);
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​
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if (!directoryExists) {
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    await filesystem.makeDir(DESTINATION_PATH, WRITE_MODE);
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}
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move
Moves a file from one location to another.
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import { filesystem } from '@oliveai/ldk';
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​
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const SOURCE_PATH = '/var/log/system.log';
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const DESTINATION_PATH = '/Users/username/system.log';
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​
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// Check to make sure the system log exists
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const systemLogExists = await filesystem.exists(SOURCE_PATH);
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​
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// Move the system log to the user folder
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await filesystem.move(SOURCE_PATH, DESTINATION_PATH);
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openWithDefaultApplication
Opens a file using the default tool for the extension provided in the path parameter, including directories. Limited to .csv, .doc, .docx, .pdf, .txt, .xls, .xlsx
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import { filesystem } from '@oliveai/ldk';
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​
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// Open foo.txt in the loop directory
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await filesystem.openWithDefaultApplication('foo.txt')
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readFile
Returns the contents of the specified file.
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import { filesystem, network } from '@oliveai/ldk';
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​
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// Path of the system log that we want to read
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const FILE_PATH = '/var/log/system.log';
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​
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// Get the contents of the system log, returned as a Uint8Array
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const encodedSysLog = await filesystem.readFile(FILE_PATH);
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​
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// Decode the contents to get the actual string value
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const decodedSysLog = await network.decode(encodedSysLog);
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​
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// decodedSysLog === human readable string of system.log contents
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remove
Removes a file/directory at the specified path.
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import { filesystem } from '@oliveai/ldk';
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​
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// Path of foo.txt in the local loop directory
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const FILE_PATH = 'foo.txt';
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​
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// Delete foo.txt
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await filesystem.remove(FILE_PATH);
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stat
Returns info about a specified file/directory.
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import { filesystem } from '@oliveai/ldk';
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​
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const DIRECTORY_PATH = '/var/log';
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const FILE_PATH = '/var/log/system.log';
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​
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const directoryInfo = await filesystem.stat(DIRECTORY_PATH);
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/*
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directoryInfo:
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{
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  "name": "log",
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  "size": 1408,
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  "mode": "drwxr-xr-x",
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  "modTime": "2021-10-28T01:01:11.003025289-04:00",
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  "isDir": true
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}
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*/
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​
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const fileInfo = await filesystem.stat(FILE_PATH);
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/*
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system.log:
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{
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  "name": "system.log",
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  "size": 353232,
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  "mode": "-rw-r-----",
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  "modTime": "2021-10-28T12:29:25.305970009-04:00",
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  "isDir": false
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}
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*/
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unzip
Unzips sourced file to a specified directory.
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import { filesystem } from '@oliveai/ldk';
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​
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// foo.zip is in the local loop directory, and contains bar.txt
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// Unzip the contents of foo.zip to the directory "baz"
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await filesystem.unzip('foo.zip', 'baz');
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​
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const unzipSuccessful = await filesystem.exists('baz/bar.txt');
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// unzipSuccessful === true
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workDir
Get the Loop's working directory
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import { filesystem } from '@oliveai/ldk';
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​
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// Get the full path to the loop's working directory
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const loopPath = await filesystem.workDir();
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​
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// macOS: loopPath === /Users/username/Library/Application Support/Olive Helps/secureloopWork/123456-unique-loop-id
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// Windows: loopPath === C:\Users\username\AppData\Roaming\Olive Helps\secureloopWork\123456-unique-loop-id
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writeFile
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import { filesystem } from '@oliveai/ldk';
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​
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// The content we'll be putting in the file
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const FILE_CONTENT = 'Some test text to put in a file';
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​
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// The path in the loop directory for the file
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const DIRECTORY = 'foo';
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const FILE_NAME = 'bar.txt';
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const filePath = await filesystem.join([DIRECTORY, FILE_NAME]);
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​
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// The permissions we want to give the file, in octal format
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// https://www.linode.com/docs/guides/modify-file-permissions-with-chmod/
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const FILE_PERMISSIONS = 0o750;
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​
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// The write operations to choose from while writing the file
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const { overwrite, append } = filesystem.WriteOperation;
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​
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const writeFileParams = {
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    data: FILE_CONTENT,
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    path: filePath,
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    writeMode: FILE_PERMISSIONS,
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    writeOperation: overwrite
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};
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​
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await filesystem.writeFile(writeFileParams);
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In this example, we use the Clipboard aptitude to listen for you copying text to the clipboard, and automatically append it to a file in the local Loop directory. This could be useful to pair with a button/toggle in a Whisper, where this capability can be enabled before rapidly copying several items, pasted into the file, then toggle it off when finished.
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import { filesystem, clipboard } from '@oliveai/ldk';
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​
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const FILE_NAME = 'clipboardPastes.txt';
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const baseWriteFileParams = {
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    data: '',
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    path: FILE_NAME,
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    writeMode: 0o755,
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    writeOperation: filesystem.WriteOperation.append,
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};
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​
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// Include clipboard events that happen while the 
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// Olive Helps window is in focus
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const INCLUDE_OLIVE_HELPS_EVENTS = true;
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​
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clipboard.listen(INCLUDE_OLIVE_HELPS_EVENTS, (clipboardText) => {
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    const writeFileParams = {
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        ...baseWriteFileParams,
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        data: clipboardText + '\n',
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    };
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​
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    await filesystem.writeFile(writeFileParams);
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});
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Listen to directory for zip files and automatically unzip then delete zip file. This could be customized with the Dropzone component to select the exact folder to monitor for ZIP files.
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import { filesystem } from '@oliveai/ldk';
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​
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// Here we're declaring the downloads folder, but this can be chosen by the
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// user using the Dropzone component in a Whisper
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const downloadsFolder = '/Users/username/Downloads';
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​
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filesystem.listenDir(downloadsFolder, async (fileEvent) => {
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    const { action, info } = fileEvent;
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​
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    // If a file was "created" in this directory
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    if (action === 'Create' && info) {
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        const { name: fileName } = info;
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​
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        // If the file is a zip file, unzip it
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        if (fileName.endsWith('.zip')) {
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            const zipFilePath = await filesystem.join([downloadsFolder, fileName]);
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​
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            // Unzip the contents to the Downloads folder
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            await filesystem.unzip(zipFilePath, downloadsFolder);
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​
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            // Delete the zip file after unzipping
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            await filesystem.remove(zipFilePath);
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        }
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    }
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});
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To use the Filesystem aptitude, use the following permissions outline in your package.json under the ldk object.
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...
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"ldk": {
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  "permissions": {
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    "filesystem": {
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      "pathGlobs": [
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        {
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          "value": "string"
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        },
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        ...
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      ]
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    },
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    ...
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  }
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},
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...
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Each value can either refer to an exact absolute path or use a glob wildcard. The only supported wildcards are ** and *, and can be used anywhere in the path.
Relative file paths can be accessed without specifying them in the permissions list.
Examples
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{
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  "ldk": {
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    "permissions": {
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      "filesystem": {
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        "pathGlobs": [
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          {
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            // Provides access to all files in the /tmp directory that have a .txt extension.
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            "value": "/tmp/*.txt"
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          },
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          {
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            // Provides access to all directories and files under the /tmp directory.
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            "value": "/tmp/**"
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          },
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          {
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            // Provides access to all files with .txt extensions in the /tmp directory or any of its subdirectories.
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            "value": "/tmp/**/*.txt"
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          },
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          {
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            // Provides access to all files with .txt extensions in any subdirectory of /tmp.
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            "value": "/tmp/*/*.txt"
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          }
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        ]
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      }
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    }
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  }
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}
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​
​
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