82 lines
2.6 KiB
JavaScript
82 lines
2.6 KiB
JavaScript
'use strict';
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var Devices = module.exports;
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Devices.add = function (store, servername, newDevice) {
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if (!store[servername]) {
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store[servername] = [];
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}
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var devices = store[servername];
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devices.push(newDevice);
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};
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Devices.alias = function (store, servername, alias) {
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if (!store[servername]) {
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store[servername] = [];
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}
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if (!store[servername]._primary) {
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store[servername]._primary = servername;
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}
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if (!store[servername].aliases) {
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store[servername].aliases = {};
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}
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store[alias] = store[servername];
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store[servername].aliases[alias] = true;
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};
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Devices.remove = function (store, servername, device) {
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var devices = store[servername] || [];
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var index = devices.indexOf(device);
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if (index < 0) {
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console.warn('attempted to remove non-present device', device.deviceId, 'from', servername);
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return null;
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}
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return devices.splice(index, 1)[0];
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};
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Devices.list = function (store, servername) {
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// efficient lookup first
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if (store[servername] && store[servername].length) {
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return store[servername]._primary && store[store[servername]._primary] || store[servername];
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}
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// There wasn't an exact match so check any of the wildcard domains, sorted longest
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// first so the one with the biggest natural match with be found first.
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var deviceList = [];
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Object.keys(store).filter(function (pattern) {
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return pattern[0] === '*' && store[pattern].length;
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}).sort(function (a, b) {
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return b.length - a.length;
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}).some(function (pattern) {
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// '.example.com' = '*.example.com'.split(1)
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var subPiece = pattern.slice(1);
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// '.com' = 'sub.example.com'.slice(-4)
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// '.example.com' = 'sub.example.com'.slice(-12)
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if (subPiece === servername.slice(-subPiece.length)) {
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console.log('[Devices.list] "'+servername+'" matches "'+pattern+'"');
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deviceList = store[pattern];
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// Devices.alias(store, '*.example.com', 'sub.example.com'
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// '*.example.com' retrieves a reference to 'example.com'
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// and this reference then also referenced by 'sub.example.com'
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// Hence this O(n) check is replaced with the O(1) check above
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Devices.alias(store, pattern, servername);
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return true;
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}
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});
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return deviceList;
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};
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Devices.exist = function (store, servername) {
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return !!(Devices.list(store, servername).length);
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};
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Devices.next = function (store, servername) {
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var devices = Devices.list(store, servername);
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var device;
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if (devices._index >= devices.length) {
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devices._index = 0;
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}
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device = devices[devices._index || 0];
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devices._index = (devices._index || 0) + 1;
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return device;
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};
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