@essex/redux-dag-history/lib/DagHistory/insert.js

"use strict";
var nextId_1 = require("../nextId");
var DagGraph_1 = require("../DagGraph");
var log = require('debug')('redux-dag-history:DagHistory');
function insert(state, history, config) {
    log('inserting new history state');
    var graph = history.graph;
    if (!graph) {
        throw new Error('History graph is not defined');
    }
    var reader = new DagGraph_1.default(graph);
    var lastStateId = reader.lastStateId, lastBranchId = reader.lastBranchId;
    var parentStateId = reader.currentStateId;
    var currentBranchId = reader.currentBranch;
    var newStateId = nextId_1.default(lastStateId);
    var newStateName = config.actionName(state, newStateId);
    var cousins = reader.childrenOf(parentStateId);
    var isBranching = cousins.length > 0 || lastBranchId > currentBranchId || currentBranchId === undefined;
    return {
        current: state,
        graph: graph.withMutations(function (g) {
            var dg = new DagGraph_1.default(g)
                .insertState(newStateId, parentStateId, state, newStateName)
                .setCurrentStateId(newStateId)
                .setLastStateId(newStateId);
            if (config.stateKeyGenerator) {
                var stateHash = config.stateKeyGenerator(state);
                log('inserting state with key', stateHash);
                dg.setHashForState(stateHash, newStateId);
            }
            if (isBranching) {
                var newBranchId = nextId_1.default(lastBranchId);
                var newBranch = config.branchName(currentBranchId, newBranchId, newStateName);
                dg.setCurrentBranch(newBranchId)
                    .setLastBranchId(newBranchId)
                    .setBranchName(newBranchId, newBranch)
                    .setLatest(newBranchId, newStateId)
                    .setFirst(newBranchId, newStateId)
                    .setCommitted(newBranchId, newStateId)
                    .markStateForBranch(newStateId, newBranchId);
            }
            else {
                dg.setLatest(currentBranchId, newStateId)
                    .setCommitted(currentBranchId, newStateId)
                    .markStateForBranch(newStateId, currentBranchId);
            }
        }),
    };
}
Object.defineProperty(exports, "__esModule", { value: true });
exports.default = insert;