41 lines
737 B
JavaScript
41 lines
737 B
JavaScript
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'use strict';
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var isPromise = require('is-promise');
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var init = function init(db, key, adapter) {
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db.read = function () {
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var r = adapter.read();
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return isPromise(r) ? r.then(db.plant) : db.plant(r);
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};
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db.write = function () {
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var value = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : db.getState();
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var w = adapter.write(db.getState());
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return isPromise(w) ? w.then(function () {
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return value;
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}) : value;
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};
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db.plant = function (state) {
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db[key] = state;
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return db;
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};
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db.getState = function () {
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return db[key];
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};
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db.setState = function (state) {
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db.plant(state);
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return db;
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};
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return db.read();
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};
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module.exports = {
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init
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};
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