json-joy
Version:
Collection of libraries for building collaborative editing apps.
66 lines (65 loc) • 2.43 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.hashModel = exports.hashNode = exports.hashId = exports.updateNode = exports.updateRga = exports.updateId = void 0;
const json_hash_1 = require("../json-hash");
const nodes_1 = require("./nodes");
const rga_1 = require("./nodes/rga");
const util2_1 = require("sonic-forest/lib/util2");
const updateId = (state, id) => {
const time = id.time;
state = (0, json_hash_1.updateNum)(state, state ^ time);
state = (0, json_hash_1.updateNum)(state, id.sid ^ time);
return state;
};
exports.updateId = updateId;
const updateRga = (state, node) => {
state = (0, json_hash_1.updateNum)(state, node.length());
state = (0, json_hash_1.updateNum)(state, node.size());
const maxIdChunk = (0, util2_1.last2)(node.ids);
if (maxIdChunk)
state = (0, exports.updateId)(state, maxIdChunk.id);
return (0, exports.updateId)(state, node.id);
};
exports.updateRga = updateRga;
/**
* Updates the hash state with the given JSON CRDT node.
* @param state Current hash state.
* @param node JSON CRDT node from which to compute the hash.
*/
const updateNode = (state, node) => {
if (node instanceof nodes_1.ConNode)
return (0, exports.updateId)(state, node.id);
if (node instanceof nodes_1.ValNode) {
const child = node.child();
if (child)
state = (0, exports.updateNode)(state, child);
return (0, exports.updateId)(state, node.id);
}
if (node instanceof nodes_1.ObjNode || node instanceof nodes_1.VecNode) {
node.children((child) => {
state = (0, exports.updateNode)(state, child);
});
return (0, exports.updateId)(state, node.id);
}
if (node instanceof nodes_1.ArrNode) {
node.children((child) => {
state = (0, exports.updateNode)(state, child);
});
}
if (node instanceof rga_1.AbstractRga)
return (0, exports.updateRga)(state, node);
throw new Error('UNKNOWN_NODE');
};
exports.updateNode = updateNode;
const hashId = (id) => {
return (0, exports.updateId)(json_hash_1.CONST.START_STATE, id);
};
exports.hashId = hashId;
const hashNode = (node) => {
return (0, exports.updateNode)(json_hash_1.CONST.START_STATE, node) >>> 0;
};
exports.hashNode = hashNode;
const hashModel = (model) => {
return (0, exports.hashNode)(model.root);
};
exports.hashModel = hashModel;