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import {type ITimestampStruct, type ITimespanStruct, Timestamp, printTs} from './clock';
import type {IJsonCrdtPatchEditOperation, IJsonCrdtPatchOperation} from './types';
import type {JsonCrdtPatchMnemonic} from './codec/verbose';
abstract class Op implements IJsonCrdtPatchOperation {
constructor(public readonly id: ITimestampStruct) {}
public span(): number {
return 1;
}
public abstract name(): JsonCrdtPatchMnemonic;
public toString(): string {
let str: string = this.name() + ' ' + printTs(this.id);
const span = this.span();
if (span > 1) str += '!' + span;
return str;
}
}
/**
* Operation which creates a constant "con" data type.
*
* @category Operations
*/
export class NewConOp extends Op implements IJsonCrdtPatchOperation {
constructor(
public readonly id: ITimestampStruct,
public readonly val: unknown | undefined | ITimestampStruct,
) {
super(id);
}
public name() {
return 'new_con' as const;
}
public toString(): string {
const val = this.val;
const klass = 'Uint8Array';
const valFormatted =
val instanceof Timestamp
? `{ ${printTs(val)} }`
: val instanceof Uint8Array
? val.length < 13
? `${klass} { ${('' + val).replaceAll(',', ', ')} }`
: `${klass}(${val.length})`
: `{ ${JSON.stringify(val)} }`;
return super.toString() + ' ' + valFormatted;
}
}
/**
* Operation which creates a new value object.
*
* @category Operations
*/
export class NewValOp extends Op implements IJsonCrdtPatchOperation {
public name() {
return 'new_val' as const;
}
}
/**
* Operation which creates a new object.
*
* @category Operations
*/
export class NewObjOp extends Op implements IJsonCrdtPatchOperation {
public name() {
return 'new_obj' as const;
}
}
/**
* Operation which creates a new vector object.
*
* @category Operations
*/
export class NewVecOp extends Op implements IJsonCrdtPatchOperation {
public name() {
return 'new_vec' as const;
}
}
/**
* Operation which creates a new string object.
*
* @category Operations
*/
export class NewStrOp extends Op implements IJsonCrdtPatchOperation {
public name() {
return 'new_str' as const;
}
}
/**
* Operation which creates a new binary object.
*
* @category Operations
*/
export class NewBinOp extends Op implements IJsonCrdtPatchOperation {
public name() {
return 'new_bin' as const;
}
}
/**
* Operation which creates a new array object.
*
* @category Operations
*/
export class NewArrOp extends Op implements IJsonCrdtPatchOperation {
public name() {
return 'new_arr' as const;
}
}
/**
* Operation which writes a new value to a value "val" object.
*
* @category Operations
*/
export class InsValOp extends Op implements IJsonCrdtPatchEditOperation {
constructor(
public readonly id: ITimestampStruct,
public readonly obj: ITimestampStruct,
public readonly val: ITimestampStruct,
) {
super(id);
}
public name() {
return 'ins_val' as const;
}
public toString(): string {
return super.toString() + `, obj = ${printTs(this.obj)}, val = ${printTs(this.val)}`;
}
}
/**
* Operation which sets object keys.
*
* @category Operations
*/
export class InsObjOp extends Op implements IJsonCrdtPatchEditOperation {
constructor(
public readonly id: ITimestampStruct,
public readonly obj: ITimestampStruct,
public readonly data: [key: string, value: ITimestampStruct][],
) {
super(id);
}
public name() {
return 'ins_obj' as const;
}
public toString(tab: string = ''): string {
const header = super.toString() + `, obj = ${printTs(this.obj)}`;
return (
header +
printTree(
tab,
this.data.map((item) => (tab) => `${JSON.stringify(item[0])}: ${printTs(item[1])}`),
)
);
}
}
/**
* Operation which sets vector elements.
*
* @category Operations
*/
export class InsVecOp extends Op implements IJsonCrdtPatchEditOperation {
constructor(
public readonly id: ITimestampStruct,
public readonly obj: ITimestampStruct,
public readonly data: [key: number, value: ITimestampStruct][],
) {
super(id);
}
public name() {
return 'ins_vec' as const;
}
public toString(tab: string = ''): string {
const header = super.toString() + `, obj = ${printTs(this.obj)}`;
return (
header +
printTree(
tab,
this.data.map((item) => (tab) => `${item[0]}: ${printTs(item[1])}`),
)
);
}
}
/**
* Operation which inserts text into a "str" string object.
*
* @category Operations
*/
export class InsStrOp extends Op implements IJsonCrdtPatchEditOperation {
constructor(
public readonly id: ITimestampStruct,
public readonly obj: ITimestampStruct,
public readonly ref: ITimestampStruct,
public data: string,
) {
super(id);
}
public span(): number {
return this.data.length;
}
public name() {
return 'ins_str' as const;
}
public toString(): string {
return super.toString() + `, obj = ${printTs(this.obj)} { ${printTs(this.ref)} ← ${JSON.stringify(this.data)} }`;
}
}
/**
* Operations which inserts binary data into a "bin" binary object.
*
* @category Operations
*/
export class InsBinOp extends Op implements IJsonCrdtPatchEditOperation {
constructor(
public readonly id: ITimestampStruct,
public readonly obj: ITimestampStruct,
public readonly ref: ITimestampStruct,
public readonly data: Uint8Array,
) {
super(id);
}
public span(): number {
return this.data.length;
}
public name() {
return 'ins_bin' as const;
}
public toString(): string {
const ref = printTs(this.ref);
return super.toString() + `, obj = ${printTs(this.obj)} { ${ref} ← ${this.data} }`;
}
}
/**
* Operation which inserts elements into an array.
*
* @category Operations
*/
export class InsArrOp extends Op implements IJsonCrdtPatchEditOperation {
/**
* @param id ID if the first operation in this compound operation.
* @param obj ID of the array where to insert elements. In theory `arr` is
* not necessary as it is possible to find the `arr` just using the
* `after` property, however to efficiently be able to find `arr` just
* by `after` at runtime all operations would need to be indexed and
* also they each would need to store a pointer to array type, which
* would require additional dozens of bytes of RAM for each array
* insert operation.
* @param ref ID of the element after which to insert elements.
* @param data The elements to insert.
*/
constructor(
public readonly id: ITimestampStruct,
public readonly obj: ITimestampStruct,
public readonly ref: ITimestampStruct,
public readonly data: ITimestampStruct[],
) {
super(id);
}
public span(): number {
return this.data.length;
}
public name() {
return 'ins_arr' as const;
}
public toString(): string {
const obj = printTs(this.obj);
const ref = printTs(this.ref);
const data = this.data.map(printTs).join(', ');
return super.toString() + ', obj = ' + obj + ' { ' + ref + ' ← ' + data + ' }';
}
}
/**
* Operation which updates an existing element in an array.
*
* @category Operations
*/
export class UpdArrOp extends Op implements IJsonCrdtPatchEditOperation {
/**
* @param id ID of this operation.
* @param obj and "arr" object ID where to update an element.
* @param ref ID of the element to update.
* @param val ID of the new value to set.
*/
constructor(
public readonly id: ITimestampStruct,
public readonly obj: ITimestampStruct,
public readonly ref: ITimestampStruct,
public readonly val: ITimestampStruct,
) {
super(id);
}
public name() {
return 'upd_arr' as const;
}
public toString(): string {
const obj = printTs(this.obj);
const ref = printTs(this.ref);
const val = printTs(this.val);
return super.toString() + ', obj = ' + obj + ' { ' + ref + ': ' + val + ' }';
}
}
/**
* Operation which deletes one or more ranges of values in some object.
* The object could be a string, an array, or a binary.
*
* @category Operations
*/
export class DelOp extends Op implements IJsonCrdtPatchEditOperation {
/**
* @param id ID of this operation.
* @param obj Object in which to delete something.
* @param what ID of the first operation to be deleted.
*/
constructor(
public readonly id: ITimestampStruct,
public readonly obj: ITimestampStruct,
public readonly what: ITimespanStruct[],
) {
super(id);
}
public name() {
return 'del' as const;
}
public toString(): string {
const spans = this.what.map((span) => printTs(span) + '!' + span.span).join(', ');
return super.toString() + `, obj = ${printTs(this.obj)} { ${spans} }`;
}
}
/**
* Operation which does nothing. Useful for skipping clock cycles, so that
* operations with a gap in clock can be included in the same patch.
*
* @category Operations
*/
export class NopOp extends Op implements IJsonCrdtPatchOperation {
constructor(
public readonly id: ITimestampStruct,
public readonly len: number,
) {
super(id);
}
public span(): number {
return this.len;
}
public name() {
return 'nop' as const;
}
}
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