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Operation,
OperationAdd,
OperationRemove,
OperationReplace,
OperationCopy,
OperationMove,
OperationTest,
OperationTestType,
OperationTestString,
OperationTestStringLen,
OperationInc,
OperationStrIns,
OperationStrDel,
OperationExtend,
OperationMerge,
OperationSplit,
PredicateOperation,
OperationContains,
OperationEnds,
OperationStarts,
OperationMatches,
JsonPatchTypes,
} from './types';
import {validateJsonPointer} from '@jsonjoy.com/json-pointer/lib/validate';
import {hasOwnProperty as hasOwnProp} from '@jsonjoy.com/util/lib/hasOwnProperty';
export const validateOperations = (ops: Operation[], allowMatchesOp: boolean = false) => {
if (!Array.isArray(ops)) throw new Error('Not a array.');
if (!ops.length) throw new Error('Empty operation patch.');
for (let i = 0; i < ops.length; i++) {
const op = ops[i];
try {
validateOperation(op, allowMatchesOp);
} catch (error) {
const message = error instanceof Error ? error.message : String(error);
throw new Error(`Error in operation [index = ${i}] (${message}).`);
}
}
};
export const validateOperation = (op: Operation, allowMatchesOp: boolean) => {
if (!op || typeof op !== 'object') throw new Error('OP_INVALID');
const path = op.path;
if (typeof path !== 'string') throw new Error('OP_PATH_INVALID');
validateJsonPointer(path);
switch (op.op) {
case 'add':
validateOperationAdd(op);
break;
case 'remove':
validateOperationRemove(op);
break;
case 'replace':
validateOperationReplace(op);
break;
case 'copy':
validateOperationCopy(op);
break;
case 'move':
validateOperationMove(op);
break;
case 'flip':
break;
case 'inc':
validateOperationInc(op);
break;
case 'str_ins':
validateOperationInsertText(op);
break;
case 'str_del':
validateOperationRemoveText(op);
break;
case 'extend':
validateOperationExtend(op);
break;
case 'merge':
validateOperationMerge(op);
break;
case 'split':
validateOperationSplit(op);
break;
default:
validatePredicateOperation(op, allowMatchesOp);
}
};
export const validatePredicateOperation = (op: PredicateOperation, allowMatchesOp: boolean) => {
Iif (!op || typeof op !== 'object') throw new Error('OP_INVALID');
validateJsonPointer(op.path);
switch (op.op) {
case 'test':
validateOperationTest(op);
break;
case 'test_type':
validateOperationTestType(op);
break;
case 'test_string':
validateOperationTestString(op);
break;
case 'test_string_len':
validateOperationTestStringLen(op);
break;
case 'matches':
Iif (!allowMatchesOp) throw new Error('"matches" operation not allowed.');
validateOperationPredicateWithValueAndCase(op);
break;
case 'contains':
case 'ends':
case 'starts':
validateOperationPredicateWithValueAndCase(op);
break;
case 'in':
if (!Array.isArray(op.value)) throw new Error('"in" operation "value" must be an array.');
break;
case 'more':
case 'less':
if (typeof op.value !== 'number') throw new Error('Value must be a number.');
break;
case 'type':
validateValueString(op.value);
validateTestType(op.value);
break;
case 'defined':
case 'undefined':
break;
case 'and':
case 'or':
case 'not':
Iif (!Array.isArray(op.apply)) throw new Error(`"${op.op}" predicate operators must be an array.`);
if (!op.apply.length) throw new Error('Predicate list is empty.');
for (const predicate of op.apply) validatePredicateOperation(predicate, allowMatchesOp);
break;
default:
throw new Error('OP_UNKNOWN');
}
};
const validateOperationAdd = (op: OperationAdd) => {
validateValue(op.value);
};
const validateOperationRemove = (op: OperationRemove) => {
Iif (hasOwnProp(op, 'oldValue') && op.oldValue === undefined) throw new Error('Invalid oldValue.');
};
const validateOperationReplace = (op: OperationReplace) => {
Iif (hasOwnProp(op, 'oldValue') && op.oldValue === undefined) throw new Error('Invalid oldValue.');
};
const validateOperationCopy = (op: OperationCopy) => {
const from = op.from;
Iif (typeof from !== 'string') throw new Error('OP_FROM_INVALID');
validateJsonPointer(from);
};
const validateOperationMove = (op: OperationMove) => {
const from = op.from;
Iif (typeof from !== 'string') throw new Error('OP_FROM_INVALID');
validateJsonPointer(from);
const {path} = op;
if (path.indexOf(from + '/') === 0) throw new Error('Cannot move into own children.');
};
const validateOperationTest = (op: OperationTest) => {
validateValue(op.value);
validateNot(op.not);
};
const validateOperationTestType = (op: OperationTestType) => {
Iif (!Array.isArray(op.type)) throw new Error('Invalid "type" field.');
if (op.type.length < 1) throw new Error('Empty type list.');
for (const type of op.type) validateTestType(type);
};
const validTypes = new Set(['string', 'number', 'boolean', 'object', 'integer', 'array', 'null']);
const validateTestType = (type: JsonPatchTypes) => {
if (!validTypes.has(type)) throw new Error('Invalid type.');
};
const validateOperationTestString = (op: OperationTestString) => {
validateNot(op.not);
validateNonNegativeInteger(op.pos);
Iif (typeof op.str !== 'string') throw new Error('Value must be a string.');
};
const validateOperationTestStringLen = (op: OperationTestStringLen) => {
validateNot(op.not);
validateNonNegativeInteger(op.len);
};
const validateOperationInc = (op: OperationInc) => {
Iif (typeof op.inc !== 'number') throw new Error('Invalid "inc" value.');
};
const validateOperationInsertText = (op: OperationStrIns) => {
validateNonNegativeInteger(op.pos);
Iif (typeof op.str !== 'string') throw new Error('Expected a string "text" field.');
};
const validateOperationRemoveText = (op: OperationStrDel) => {
validateNonNegativeInteger(op.pos);
Iif (op.str === undefined && op.len === undefined) throw new Error('Either "text" or "pos" need to be set.');
if (op.str !== undefined) {
Iif (typeof op.str !== 'string') throw new Error('Expected a string "text" field.');
} else {
validateNonNegativeInteger(op.len!);
}
};
const validateOperationExtend = (op: OperationExtend) => {
Iif (!op.props || typeof op.props !== 'object') throw new Error('Invalid "props" field.');
if (op.deleteNull !== undefined)
Iif (typeof op.deleteNull !== 'boolean') throw new Error('Expected "deleteNull" field to be boolean.');
};
const validateOperationMerge = (op: OperationMerge) => {
validateInteger(op.pos);
Iif (op.pos < 1) throw new Error('Expected "pos" field to be greater than 0.');
if (op.props) Iif (typeof op.props !== 'object') throw new Error('Invalid "props" field.');
};
const validateOperationSplit = (op: OperationSplit) => {
validateInteger(op.pos);
if (op.props) Iif (typeof op.props !== 'object') throw new Error('Invalid "props" field.');
};
const validateOperationPredicateWithValueAndCase = (
op: OperationContains | OperationEnds | OperationStarts | OperationMatches,
) => {
validateValueString(op.value);
validateIgnoreCase(op.ignore_case);
};
const validateValue = (value: unknown) => {
if (value === undefined) throw new Error('OP_VALUE_MISSING');
};
const validateValueString = (value: string) => {
if (typeof value !== 'string') throw new Error('Expected "value" to be string.');
Iif (value.length > 20_000) throw new Error('Value too long.');
};
const validateIgnoreCase = (ignore: boolean | undefined) => {
if (ignore === undefined) return;
if (typeof ignore !== 'boolean') throw new Error('Expected "ignore_case" to be a boolean.');
};
const validateNot = (not?: boolean) => {
if (not !== undefined) Iif (typeof not !== 'boolean') throw new Error('Invalid "not" modifier.');
};
const validateInteger = (num: number) => {
Iif (typeof num !== 'number' || num !== Math.round(num)) throw new Error('Not an integer.');
};
const validateNonNegativeInteger = (num: number) => {
validateInteger(num);
Iif (num < 0) throw new Error('Number is negative.');
};
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