json-joy
Version:
Collection of libraries for building collaborative editing apps.
50 lines (49 loc) • 2.09 kB
JavaScript
export var VALIDATE_RESULT;
(function (VALIDATE_RESULT) {
VALIDATE_RESULT[VALIDATE_RESULT["SUCCESS"] = 0] = "SUCCESS";
VALIDATE_RESULT[VALIDATE_RESULT["INVALID_OP"] = 1] = "INVALID_OP";
VALIDATE_RESULT[VALIDATE_RESULT["INVALID_COMPONENT"] = 2] = "INVALID_COMPONENT";
VALIDATE_RESULT[VALIDATE_RESULT["ADJACENT_SAME_TYPE"] = 3] = "ADJACENT_SAME_TYPE";
VALIDATE_RESULT[VALIDATE_RESULT["NO_TRAILING_RETAIN"] = 4] = "NO_TRAILING_RETAIN";
})(VALIDATE_RESULT || (VALIDATE_RESULT = {}));
export const validate = (op) => {
if (!(op instanceof Array))
return VALIDATE_RESULT.INVALID_OP;
if (op.length === 0)
return VALIDATE_RESULT.INVALID_OP;
let last;
for (let i = 0; i < op.length; i++) {
const component = op[i];
if (typeof component === 'number') {
if (!component)
return VALIDATE_RESULT.INVALID_COMPONENT;
if (component !== Math.round(component))
return VALIDATE_RESULT.INVALID_COMPONENT;
if (component > 0) {
const lastComponentIsRetain = typeof last === 'number' && last > 0;
if (lastComponentIsRetain)
return VALIDATE_RESULT.ADJACENT_SAME_TYPE;
}
else {
const lastComponentIsDelete = typeof last === 'number' && last < 0;
if (lastComponentIsDelete)
return VALIDATE_RESULT.ADJACENT_SAME_TYPE;
}
}
else if (component instanceof Uint8Array) {
if (!component.length)
return VALIDATE_RESULT.INVALID_COMPONENT;
const lastComponentIsInsert = last instanceof Uint8Array;
if (lastComponentIsInsert)
return VALIDATE_RESULT.ADJACENT_SAME_TYPE;
}
else {
return VALIDATE_RESULT.INVALID_COMPONENT;
}
last = component;
}
const isLastRetain = typeof last === 'number' && last > 0;
if (isLastRetain)
return VALIDATE_RESULT.NO_TRAILING_RETAIN;
return VALIDATE_RESULT.SUCCESS;
};