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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 | 17x 17x 17x 17x 160x 160x 160x 160x 33x 6x 34x 112x 112x 112x 112x 112x 112x 112x 112x 112x 112x 112x 20x 112x 21x 8x 13x 12x 12x | import type {CompactStrDelOp, OPCODE_STR_DEL} from '../codec/compact/types';
import {AbstractOp} from './AbstractOp';
import type {OperationStrDel} from '../types';
import {find, type Path, formatJsonPointer} from '@jsonjoy.com/json-pointer';
import {OPCODE} from '../constants';
/**
* @category JSON Patch Extended
*/
export class OpStrDel extends AbstractOp<'str_del'> {
constructor(
path: Path,
public readonly pos: number,
public readonly str: string | undefined,
public readonly len: number | undefined,
) {
super(path);
}
public op() {
return 'str_del' as const;
}
public code() {
return OPCODE.str_del;
}
public deleteLength(): number {
return typeof this.str === 'string' ? this.str.length : this.len!;
}
public apply(doc: unknown) {
const {val, key, obj} = find(doc, this.path);
Iif (typeof val !== 'string') throw new Error('NOT_A_STRING');
const length = val.length;
const pos = Math.min(this.pos, val.length);
const start = Math.min(pos, length);
const deletionLength: number = this.str !== undefined ? this.str.length : this.len!;
const end = Math.min(pos + deletionLength, length);
const before = val.slice(0, start);
const after = val.substr(end);
const result = before + after;
if (obj) (obj as any)[key as any] = result;
else doc = result;
return {doc, old: val};
}
public toJson(parent?: AbstractOp): OperationStrDel {
if (typeof this.str === 'string') {
return {
op: 'str_del',
path: formatJsonPointer(this.path),
pos: this.pos,
str: this.str,
};
}
return {
op: 'str_del',
path: formatJsonPointer(this.path),
pos: this.pos,
len: this.len,
};
}
public toCompact(parent: undefined | AbstractOp, verbose: boolean): CompactStrDelOp {
const opcode: OPCODE_STR_DEL = verbose ? 'str_del' : OPCODE.str_del;
return typeof this.str === 'string'
? [opcode, this.path, this.pos, this.str]
: ([opcode, this.path, this.pos, 0, this.len] as CompactStrDelOp);
}
}
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