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2 years ago
"use strict";
exports.__esModule = true;
exports.default = createMigrate;
var _constants = require("./constants");
function createMigrate(migrations, config) {
var _ref = config || {},
debug = _ref.debug;
return function (state, currentVersion) {
if (!state) {
if (process.env.NODE_ENV !== 'production' && debug) console.log('redux-persist: no inbound state, skipping migration');
return Promise.resolve(undefined);
}
var inboundVersion = state._persist && state._persist.version !== undefined ? state._persist.version : _constants.DEFAULT_VERSION;
if (inboundVersion === currentVersion) {
if (process.env.NODE_ENV !== 'production' && debug) console.log('redux-persist: versions match, noop migration');
return Promise.resolve(state);
}
if (inboundVersion > currentVersion) {
if (process.env.NODE_ENV !== 'production') console.error('redux-persist: downgrading version is not supported');
return Promise.resolve(state);
}
var migrationKeys = Object.keys(migrations).map(function (ver) {
return parseInt(ver);
}).filter(function (key) {
return currentVersion >= key && key > inboundVersion;
}).sort(function (a, b) {
return a - b;
});
if (process.env.NODE_ENV !== 'production' && debug) console.log('redux-persist: migrationKeys', migrationKeys);
try {
var migratedState = migrationKeys.reduce(function (state, versionKey) {
if (process.env.NODE_ENV !== 'production' && debug) console.log('redux-persist: running migration for versionKey', versionKey);
return migrations[versionKey](state);
}, state);
return Promise.resolve(migratedState);
} catch (err) {
return Promise.reject(err);
}
};
}