测试版

node_modules/store/plugins/v1-backcompat.js

@@ -0,0 +1,52 @@
+var dumpPlugin = require('./dump')
+var json2Plugin = require('./json2')
+
+module.exports = [dumpPlugin, json2Plugin, v1BackcompatPlugin]
+
+function v1BackcompatPlugin() {
+	this.disabled = !this.enabled
+	return {
+		has: backcompat_has,
+		transact: backcompat_transact,
+		clear: backcompat_clear,
+		forEach: backcompat_forEach,
+		getAll: backcompat_getAll,
+		serialize: backcompat_serialize,
+		deserialize: backcompat_deserialize,
+	}
+}
+
+function backcompat_has(_, key) {
+	return this.get(key) !== undefined
+}
+function backcompat_transact(_, key, defaultVal, transactionFn) {
+	if (transactionFn == null) {
+		transactionFn = defaultVal
+		defaultVal = null
+	}
+	if (defaultVal == null) {
+		defaultVal = {}
+	}
+	var val = this.get(key, defaultVal)
+	var ret = transactionFn(val)
+	this.set(key, ret === undefined ? val : ret)
+}
+function backcompat_clear(_) {
+	return this.clearAll.call(this)
+}
+function backcompat_forEach(_, fn) {
+	return this.each.call(this, function(val, key) {
+		fn(key, val)
+	})
+}
+function backcompat_getAll(_) {
+	return this.dump.call(this)
+}
+function backcompat_serialize(_, value) {
+	return JSON.stringify(value)
+}
+function backcompat_deserialize(_, value) {
+	if (typeof value != 'string') { return undefined }
+	try { return JSON.parse(value) }
+	catch(e) { return value || undefined }
+}