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const {
SchemaFactory,
validatesAsZObject,
validatesAsFunctionCall,
validatesAsReference,
ZObjectKeyFactory
} = require( '../function-schemata/javascript/src/schema.js' );
const { isUserDefined, getHead, getTail, makeMappedResultEnvelope, isVoid, isZMap, getZMapValue
} = require( '../function-schemata/javascript/src/utils' );
const normalFactory = SchemaFactory.NORMAL();
const Z6Validator = normalFactory.create( 'Z6_literal' );
const Z9Validator = normalFactory.create( 'Z9_literal' );
/**
* Determines whether argument is a Z6 or Z9. These two types' Z1K1s are
* strings instead of Z9s, so some checks below need to special-case their
* logic.
*
* @param {Object} Z1 a ZObject
* @return {bool} true if Z1 validates as either Z6 or Z7
*/
async function isRefOrString( Z1 ) {
const { ZWrapper } = require( './ZWrapper' );
if ( Z1 instanceof ZWrapper ) {
Z1 = Z1.asJSON();
}
return (
( await Z6Validator.validate( Z1 ) ) ||
( await Z9Validator.validate( Z1 ) )
);
}
async function createZObjectKey( ZObject ) {
const { ZWrapper } = require( './ZWrapper' );
if ( ZObject instanceof ZWrapper ) {
ZObject = ZObject.asJSON();
}
return await ZObjectKeyFactory.create( ZObject );
}
async function createSchema( Z1 ) {
// TODO (T302032): Use function-schemata version of findIdentity to improve
// type inference here.
let Z1K1 = Z1.Z1K1;
const { ZWrapper } = require( './ZWrapper' );
Iif ( Z1K1 instanceof ZWrapper ) {
Z1K1 = Z1K1.asJSON();
}
if ( await isRefOrString( Z1 ) ) {
return normalFactory.create( Z1K1 );
}
if ( ( await validatesAsReference( Z1K1 ) ).isValid() ) {
Iif ( isUserDefined( Z1K1.Z9K1 ) ) {
throw new Error( `Tried to create schema for unrecognized ZID ${Z1K1.Z9K1}` );
}
return normalFactory.create( Z1K1.Z9K1 );
}
const result = await normalFactory.createUserDefined( [ Z1K1 ] );
const key = ( await createZObjectKey( Z1K1 ) ).asString();
return result.get( key );
}
/**
* Validates a ZObject against the Error schema.
*
* @param {Object} Z1 object to be validated
* @return {bool} whether Z1 can validate as an Error
*/
function isError( Z1 ) {
// TODO (T287921): Assay that Z1 validates as Z5 but not as Z9 or Z18.
try {
return Z1.Z1K1 === 'Z5' || Z1.Z1K1.Z9K1 === 'Z5';
} catch ( error ) {
return false;
}
}
/**
* Validates a ZObject against the GENERIC schema.
*
* @param {Object} Z1 object to be validated
* @return {bool} whether Z1 can validate as a generic type instantiation
*/
async function isGenericType( Z1 ) {
// TODO (T296658): Use the GENERIC schema.
try {
let Z1K1 = Z1.Z1K1;
const { ZWrapper } = require( './ZWrapper' );
Eif ( Z1 instanceof ZWrapper ) {
Z1K1 = Z1.asJSON().Z1K1;
}
if ( !( await validatesAsFunctionCall( Z1K1 ) ).isValid() ) {
return false;
}
const localKeyRegex = /K[1-9]\d*$/;
for ( const key of Z1.keys() ) {
if ( key === 'Z1K1' || key === 'Z7K1' ) {
continue;
}
Iif ( key.match( localKeyRegex ) === null ) {
return false;
}
}
return true;
} catch ( err ) {
return false;
}
}
/**
* Determines whether a Z22 / Evaluation result contains an error. Works both with older
* "basic" Z22s and with newer map-based Z22s.
*
* @param {Object} envelope a Z22
* @return {bool} true if Z22K2 contains an error; false otherwise
*/
function containsError( envelope ) {
const metadata = envelope.Z22K2;
if ( isVoid( metadata ) ) {
return false;
} else if ( isZMap( metadata ) ) {
return ( getZMapValue( metadata, { Z1K1: 'Z6', Z6K1: 'errors' } ) !== undefined );
} else {
return isError( metadata );
}
}
/**
* Determines whether a pair contains a value (i.e., a non-Void first element).
* The input pair should be in normal form.
*
* FIXME (T311055): containsValue might require normal form, as validateAsZObject
* is a normal validator. Check and document.
*
* @param {Object} pair a Z22
* @return {bool} true if Z22K1 is not Z24 / Void; false otherwise
*/
async function containsValue( pair ) {
const Z22K1 = pair.Z22K1.asJSON();
return (
( await validatesAsZObject( Z22K1 ) ).isValid() &&
!( isVoid( Z22K1 ) )
);
}
function makeBoolean( truthy = false, canonical = false ) {
const zobject = {};
Iif ( canonical ) {
zobject.Z1K1 = 'Z40';
} else {
zobject.Z1K1 = {
Z1K1: 'Z9',
Z9K1: 'Z40'
};
}
Eif ( truthy ) {
Iif ( canonical ) {
zobject.Z40K1 = 'Z41';
} else {
zobject.Z40K1 = {
Z1K1: 'Z9',
Z9K1: 'Z41'
};
}
} else {
if ( canonical ) {
zobject.Z40K1 = 'Z42';
} else {
zobject.Z40K1 = {
Z1K1: 'Z9',
Z9K1: 'Z42'
};
}
}
return zobject;
}
// TODO (T292650): This needs to generate an actual error instead of Z6s.
function generateError( errorString = 'An unknown error occurred' ) {
return {
Z1K1: {
Z1K1: 'Z9',
Z9K1: 'Z5'
},
Z5K2: {
Z1K1: {
Z1K1: 'Z7',
Z7K1: 'Z881',
Z881K1: 'Z6'
},
K1: {
Z1K1: {
Z1K1: 'Z9',
Z9K1: 'Z6'
},
Z6K1: errorString
},
K2: {
Z1K1: {
Z1K1: 'Z7',
Z7K1: 'Z881',
Z881K1: 'Z6'
}
}
}
};
}
async function traverseZList( ZList, callback ) {
let tail = ZList;
if ( tail === undefined ) {
return;
}
while ( getHead( tail ) !== undefined ) {
await callback( tail );
tail = getTail( tail );
}
}
/**
* Runs several functions in sequence; returns first one whose Z22K2 is an error.
*
* @param {Object} Z22 a Z22/ResultEnvelope
* @param {Array} callTuples an array whose elements are also arrays of the form
* [ function, argument list, name ]
* every function accepts Z22 as its first argument and will be called with the
* result of the previous function (starting with input Z22). If the resulting Z22
* contains an error (Z22K2), this function returns immediately; otherwise, it
* calls the next function with the output of the previous.
* @param {Function} callback optional callback to be called on every element of
* callTuples; arguments are of the form ( current Z22, current call tuple)
* @param {boolean} addZ22 whether to inject Z22.Z22K1 as first argument to callables
* @return {Object} a Z22
*/
async function returnOnFirstError( Z22, callTuples, callback = null, addZ22 = true ) {
let currentPair = Z22;
for ( const callTuple of callTuples ) {
if (
containsError( currentPair ) ||
isVoid( currentPair.Z22K1 )
) {
break;
}
if ( callback !== null ) {
await callback( currentPair, callTuple );
}
const callable = callTuple[ 0 ];
const args = [];
if ( addZ22 ) {
args.push( currentPair.Z22K1 );
}
for ( const arg of callTuple[ 1 ] ) {
args.push( arg );
}
currentPair = await callable( ...args );
}
return currentPair;
}
function quoteZObject( ZObject ) {
const { ZWrapper } = require( './ZWrapper' );
return ZWrapper.create( {
Z1K1: {
Z1K1: 'Z9',
Z9K1: 'Z99'
},
Z99K1: ZObject
} );
}
function makeWrappedResultEnvelope( ...args ) {
const { ZWrapper } = require( './ZWrapper' );
return ZWrapper.create( makeMappedResultEnvelope( ...args ) );
}
module.exports = {
containsError,
containsValue,
createSchema,
createZObjectKey,
generateError,
isError,
isGenericType,
isRefOrString,
makeBoolean,
makeWrappedResultEnvelope,
quoteZObject,
returnOnFirstError,
traverseZList
};
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