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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 | 170x 170x 170x 170x 170x 26280x 26280x 26280x 2x 121763x 93176x 93176x 91481x 121763x 121762x 121762x 121760x 121760x 80652x 121760x 26280x 5771x 2863x 2863x 2863x 2099x 2099x 2096x 2096x 5x 2863x 2133x 2133x 2126x 2126x 2126x 27x 2099x 22x 158117x 158117x 158117x 158117x 740265x 740265x 740265x 740265x 26280x 1770x 1770x 755x 755x 755x 755x 755x 755x 755x 2856x 2856x 2856x 2856x 2856x 755x 26280x 13x 7x 7x 7x 7x 7x 20x 20x | import {ConNode} from '../const/ConNode';
import {CRDT_CONSTANTS} from '../../constants';
import {printTree} from 'tree-dump/lib/printTree';
import {compare, type ITimestampStruct, printTs} from '../../../json-crdt-patch/clock';
import type {Model} from '../../model';
import type {JsonNode, JsonNodeView} from '..';
import type {Printable} from 'tree-dump/lib/types';
import type {ExtNode} from '../../extensions/ExtNode';
import type {VecNodeExtensionData} from '../../schema/types';
/**
* Represents a `vec` JSON CRDT node, which is a LWW array.
*
* Vector is, usually a fixed length, last-write-wins array. Each element
* in the array is a reference to another JSON CRDT node. The vector
* can be extended by adding new elements to the end of the array.
*
* @category CRDT Node
*/
export class VecNode<Value extends JsonNode[] = JsonNode[]> implements JsonNode<JsonNodeView<Value>>, Printable {
/**
* @ignore
*/
public readonly elements: (ITimestampStruct | undefined)[] = [];
constructor(
/**
* @ignore
*/
public readonly doc: Model<any>,
public readonly id: ITimestampStruct,
) {}
public length(): number {
return this.elements.length;
}
/**
* Retrieves the ID of an element at the given index.
*
* @param index Index of the element to get.
* @returns ID of the element at the given index, if any.
*/
public val(index: number): ITimestampStruct | undefined {
return this.elements[index] as ITimestampStruct | undefined;
}
/**
* Retrieves the JSON CRDT node at the given index.
*
* @param index Index of the element to get.
* @returns JSON CRDT node at the given index, if any.
*/
public get<Index extends number>(index: Index): Value[Index] | undefined {
const id = this.elements[index] as ITimestampStruct | undefined;
if (!id) return undefined;
return this.doc.index.get(id);
}
/**
* @ignore
*/
public put(index: number, id: ITimestampStruct): ITimestampStruct | undefined {
if (index > CRDT_CONSTANTS.MAX_TUPLE_LENGTH) throw new Error('OUT_OF_BOUNDS');
const currentId = this.val(index);
if (currentId && compare(currentId, id) >= 0) return;
if (index > this.elements.length) for (let i = this.elements.length; i < index; i++) this.elements.push(undefined);
if (index < this.elements.length) this.elements[index] = id;
else this.elements.push(id);
return currentId;
}
// ----------------------------------------------------------------- extension
/**
* @ignore
*/
private __extNode: VecNodeExtensionData<Value> = <any>undefined;
/**
* @ignore
* @returns Returns the extension data node if this is an extension node,
* otherwise `undefined`. The node is cached after the first access.
*/
public ext(): VecNodeExtensionData<Value> {
if (this.__extNode) return this.__extNode;
const extensionId = this.getExtId();
const isExtension = extensionId >= 0;
if (!isExtension) return <any>undefined;
const extension = this.doc.ext.get(extensionId);
if (!extension) return <any>undefined;
this.__extNode = new extension.Node(this.get(1)!);
return this.__extNode;
}
/**
* @ignore
*/
public isExt(): boolean {
return !!this.ext();
}
/**
* @ignore
* @returns Returns extension ID if this is an extension node, otherwise -1.
*/
public getExtId(): number {
if (this.elements.length !== 2) return -1;
const type = this.get(0);
if (!(type instanceof ConNode)) return -1;
const buf = type.val;
const id = this.id;
if (!(buf instanceof Uint8Array) || buf.length !== 3 || buf[1] !== id.sid % 256 || buf[2] !== id.time % 256)
return -1;
return buf[0];
}
/** ------------------------------------------------------ {@link JsonNode} */
/**
* @ignore
*/
public child(): ExtNode<JsonNode> | undefined {
return this.ext();
}
/**
* @ignore
*/
public container(): JsonNode | undefined {
return this;
}
/**
* @ignore
*/
public children(callback: (node: JsonNode) => void) {
const elements = this.elements;
const length = elements.length;
const index = this.doc.index;
for (let i = 0; i < length; i++) {
const id = elements[i];
Iif (!id) continue;
const node = index.get(id);
if (node) callback(node);
}
}
/**
* @ignore
*/
private _view = [] as JsonNodeView<Value>;
/**
* @ignore
*/
public view(): JsonNodeView<Value> {
const extNode = this.ext();
if (extNode) return extNode.view() as any;
let useCache = true;
const _view = this._view;
const arr = [] as JsonNodeView<Value>;
const index = this.doc.index;
const elements = this.elements;
const length = elements.length;
for (let i = 0; i < length; i++) {
const id = elements[i];
const node = id ? index.get(id) : undefined;
const value = node ? node.view() : undefined;
if (_view[i] !== value) useCache = false;
arr.push(value);
}
return useCache ? _view : (this._view = arr);
}
/**
* @ignore
*/
public api: undefined | unknown = undefined;
public name(): string {
return 'vec';
}
/** ----------------------------------------------------- {@link Printable} */
public toString(tab: string = ''): string {
const extNode = this.ext();
const header = this.name() + ' ' + printTs(this.id) + (extNode ? ` { extension = ${this.getExtId()} }` : '');
Iif (extNode) {
return this.child()!.toString(tab, this.id);
}
const index = this.doc.index;
return (
header +
printTree(tab, [
...this.elements.map(
(id, i) => (tab: string) =>
`${i}: ${
!id ? 'nil' : index.get(id) ? index.get(id)!.toString(tab + ' ' + ' '.repeat(('' + i).length)) : 'nil'
}`,
),
...(extNode ? [(tab: string) => `${this.child()!.toString(tab)}`] : []),
])
);
}
}
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