88 lines
2.7 KiB
JavaScript
88 lines
2.7 KiB
JavaScript
var NODE_TYPE_FILE = require('./constants.js').NODE_TYPE_FILE;
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var NODE_TYPE_DIRECTORY = require('./constants.js').NODE_TYPE_DIRECTORY;
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var NODE_TYPE_SYMBOLIC_LINK = require('./constants.js').NODE_TYPE_SYMBOLIC_LINK;
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var NODE_TYPE_META = require('./constants.js').NODE_TYPE_META;
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var ROOT_DIRECTORY_NAME = require('./constants.js').ROOT_DIRECTORY_NAME;
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var S_IFREG = require('./constants.js').S_IFREG;
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var S_IFDIR = require('./constants.js').S_IFDIR;
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var S_IFLNK = require('./constants.js').S_IFLNK;
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var DEFAULT_FILE_PERMISSIONS = require('./constants.js').DEFAULT_FILE_PERMISSIONS;
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var DEFAULT_DIR_PERMISSIONS = require('./constants.js').DEFAULT_DIR_PERMISSIONS;
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function getMode(type, mode) {
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switch(type) {
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case NODE_TYPE_DIRECTORY:
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return (mode || DEFAULT_DIR_PERMISSIONS) | S_IFDIR;
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case NODE_TYPE_SYMBOLIC_LINK:
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return (mode || DEFAULT_FILE_PERMISSIONS) | S_IFLNK;
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/* jshint -W086 */
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case NODE_TYPE_FILE:
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// falls through
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default:
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return (mode || DEFAULT_FILE_PERMISSIONS) | S_IFREG;
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}
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}
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function Node(options) {
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var now = Date.now();
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this.id = options.id;
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this.type = options.type || NODE_TYPE_FILE; // node type (file, directory, etc)
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this.size = options.size || 0; // size (bytes for files, entries for directories)
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this.atime = options.atime || now; // access time (will mirror ctime after creation)
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this.ctime = options.ctime || now; // creation/change time
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this.mtime = options.mtime || now; // modified time
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this.flags = options.flags || []; // file flags
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this.xattrs = options.xattrs || {}; // extended attributes
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this.nlinks = options.nlinks || 0; // links count
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this.data = options.data; // id for data object
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this.version = options.version || 1;
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// permissions and flags
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this.mode = options.mode || (getMode(this.type));
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this.uid = options.uid || 0x0; // owner name
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this.gid = options.gid || 0x0; // group name
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}
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// Make sure the options object has an id on property,
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// either from caller or one we generate using supplied guid fn.
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function ensureID(options, prop, callback) {
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if(options[prop]) {
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callback(null);
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} else {
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options.guid(function(err, id) {
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options[prop] = id;
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callback(err);
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});
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}
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}
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Node.create = function(options, callback) {
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// We expect both options.id and options.data to be provided/generated.
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ensureID(options, 'id', function(err) {
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if(err) {
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callback(err);
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return;
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}
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ensureID(options, 'data', function(err) {
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if(err) {
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callback(err);
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return;
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}
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callback(null, new Node(options));
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});
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});
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};
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// Update the node's mode (permissions), taking file type bits into account.
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Node.setMode = function(mode, node) {
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node.mode = getMode(node.type, mode);
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};
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module.exports = Node;
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