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* WikiLambda Vue editor: schemata mixin
* Mixin with functions to convert zobjects between hybrid and canonical forms.
* Thsse conversions are distinct from canonicalize and normalize of function-schemata; hybrid form
* meets slightly different representational requirements of the UI layer.
*
* @copyright 2020– Abstract Wikipedia team; see AUTHORS.txt
* @license MIT
*/
'use strict';
/* eslint-disable no-implicit-globals */
const Constants = require( '../Constants.js' ),
typeUtils = require( './typeUtils.js' ).methods;
// Note: This is intentionally "wrong" in that it allows for Z0.
// It excludes letters so as not to apply to keys (containing a 'K').
const referenceRe = /^Z0*[1-9]*\d*$/;
const errorTypeReferenceRe = /^Z5\d{2}$/;
function canonicalizeZ6OrZ9( zobject ) {
const objectType = zobject[ Constants.Z_OBJECT_TYPE ];
if ( objectType === Constants.Z_STRING ) {
const Z6 = zobject[ Constants.Z_STRING_VALUE ];
if ( Z6 && typeof Z6.match === 'function' && Z6.match( referenceRe ) ) {
return zobject;
}
return Z6 || '';
}
const Z9 = zobject[ Constants.Z_REFERENCE_ID ];
if ( Z9 && typeof Z9.match === 'function' && Z9.match( referenceRe ) ) {
return Z9;
}
return '';
}
/**
* Transform a ZObject from hybrid form to canonical form. In hybrid form, strings and references are in normal
* form, but lists are in canonical form. If called on a ZObject already in canonical form, returns the ZObject
* unchanged.
*
* This also handles lists in normal form; this is done defensively, because the orchestrator can still return normal
* form sometimes (T354917). Normal forms are not handled as thoroughly as function-schemata's canonicalize.
*
* @param {Object | Array | string | undefined} zobject
* @return {Object | Array | string | undefined}
*/
function hybridToCanonical( zobject ) {
// Given a typed list in normal form, convert its elements to canonical and return them in an array
// (while ignoring its Z1K1)
function zlistToArray( zlist, arr ) {
const head = zlist[ Constants.Z_TYPED_OBJECT_ELEMENT_1 ],
tail = zlist[ Constants.Z_TYPED_OBJECT_ELEMENT_2 ];
if ( typeof arr === 'undefined' ) {
arr = [];
}
if ( head ) {
arr.push( hybridToCanonical( head ) );
}
if ( tail ) {
return zlistToArray( tail, arr );
} else {
return arr;
}
}
let canon = {};
if ( typeof zobject === 'undefined' ) {
return undefined;
} else if ( typeof zobject === 'string' ) {
canon = zobject;
} else if ( Array.isArray( zobject ) ) {
canon = zobject.map( function ( element ) {
return hybridToCanonical( element );
} );
} else if (
[ Constants.Z_REFERENCE, Constants.Z_STRING ].includes( zobject[ Constants.Z_OBJECT_TYPE ] )
) {
canon = canonicalizeZ6OrZ9( zobject );
} else if (
// Allow for typed lists in normal form, where the list's Z_OBJECT_TYPE is a function call.
// See also the header comments for this function.
typeUtils.isTruthyOrEqual( zobject, [
Constants.Z_OBJECT_TYPE,
Constants.Z_FUNCTION_CALL_FUNCTION,
Constants.Z_REFERENCE_ID
], Constants.Z_TYPED_LIST )
) {
const itemType = zobject[ Constants.Z_OBJECT_TYPE ][ Constants.Z_TYPED_LIST_TYPE ];
canon = [ hybridToCanonical( itemType ), ...hybridToCanonical( zlistToArray( zobject ) ) ];
} else if ( zobject[ Constants.Z_OBJECT_TYPE ] &&
// Accommodate both hybrid form and canonical
( zobject[ Constants.Z_OBJECT_TYPE ][ Constants.Z_REFERENCE_ID ] === Constants.Z_QUOTE ||
zobject[ Constants.Z_OBJECT_TYPE ] === Constants.Z_QUOTE )
) {
canon[ Constants.Z_OBJECT_TYPE ] = Constants.Z_QUOTE;
canon[ Constants.Z_QUOTE_VALUE ] = zobject[ Constants.Z_QUOTE_VALUE ];
} else {
Object.keys( zobject ).forEach( function ( key ) {
canon[ key ] = hybridToCanonical( zobject[ key ] );
} );
}
return canon;
}
function isString( s ) {
return typeof s === 'string' || s instanceof String;
}
function isZid( k ) {
return k.match( /^Z[1-9]\d*$/ ) !== null;
}
/**
* Transform a ZObject from canonical form to hybrid form. In hybrid form, strings and references are in normal
* form, but lists remain in canonical form. If called on a ZObject already in hybrid form, returns the ZObject
* unchanged.
*
* @param {Object | Array | string} zobject
* @return {Object|Array|undefined}
*/
function canonicalToHybrid( zobject ) {
let hybrid = {},
keys;
if ( typeof zobject === 'undefined' ) {
return undefined;
} else if ( typeof zobject === 'string' ) {
if ( typeUtils.getZObjectType( zobject ) === Constants.Z_REFERENCE ) {
hybrid = {
Z1K1: Constants.Z_REFERENCE,
Z9K1: zobject
};
} else {
hybrid = {
Z1K1: Constants.Z_STRING,
Z6K1: zobject
};
}
} else if ( Array.isArray( zobject ) ) {
hybrid = zobject.map( function ( element ) {
return canonicalToHybrid( element );
} );
} else if ( zobject[ Constants.Z_OBJECT_TYPE ] &&
// Accommodate both hybrid form and canonical
( zobject[ Constants.Z_OBJECT_TYPE ][ Constants.Z_REFERENCE_ID ] === Constants.Z_QUOTE ||
zobject[ Constants.Z_OBJECT_TYPE ] === Constants.Z_QUOTE )
) {
const normalType = {
Z1K1: Constants.Z_REFERENCE,
Z9K1: Constants.Z_QUOTE
};
hybrid[ Constants.Z_OBJECT_TYPE ] = normalType;
hybrid[ Constants.Z_QUOTE_VALUE ] = zobject[ Constants.Z_QUOTE_VALUE ];
} else {
keys = Object.keys( zobject );
for ( let i = 0; i < keys.length; i++ ) {
if ( keys[ i ] === Constants.Z_OBJECT_TYPE && (
zobject.Z1K1 === Constants.Z_STRING || zobject.Z1K1 === Constants.Z_REFERENCE ) ) {
hybrid.Z1K1 = zobject.Z1K1;
continue;
}
if ( keys[ i ] === Constants.Z_PERSISTENTOBJECT_ID && isString( zobject.Z2K1 ) ) {
hybrid.Z2K1 = {
Z1K1: Constants.Z_STRING,
Z6K1: zobject.Z2K1
};
continue;
}
if ( keys[ i ] === Constants.Z_STRING_VALUE && isString( zobject.Z6K1 ) ) {
hybrid.Z6K1 = zobject.Z6K1;
continue;
}
if ( keys[ i ] === Constants.Z_REFERENCE_ID && isString( zobject.Z9K1 ) ) {
hybrid.Z9K1 = zobject.Z9K1;
continue;
}
hybrid[ keys[ i ] ] = canonicalToHybrid( zobject[ keys[ i ] ] );
}
}
return hybrid;
}
/**
* Return the ZMap value corresponding to the given key, if present.
* TODO (T302015) When ZMap keys are extended beyond Z6/Z39, update accordingly
*
* @param {Object} zMap a Z883/Typed map, in canonical form
* @param {Object} key a Z6 or Z39 instance, in canonical form
* @return {Object|undefined} a Z1/Object, the value of the map entry with the given key,
* or undefined if there is no such entry
*/
function getValueFromCanonicalZMap( zMap, key ) {
const K1Array = zMap[ Constants.Z_TYPED_OBJECT_ELEMENT_1 ];
// Ignore first item in the canonical form array; this is a string representing the type
for ( let i = 1; i < K1Array.length; i++ ) {
const entry = K1Array[ i ];
// To accommodate our current programming practices, we need to allow for either key here:
const currentKey = entry[ Constants.Z_TYPED_OBJECT_ELEMENT_1 ] || entry[ Constants.Z_TYPED_PAIR_TYPE1 ];
Eif ( ( currentKey === key ) ||
( currentKey[ Constants.Z_OBJECT_TYPE ] === Constants.Z_STRING &&
key[ Constants.Z_OBJECT_TYPE ] === Constants.Z_STRING &&
currentKey[ Constants.Z_STRING_VALUE ] === key[ Constants.Z_STRING_VALUE ] ) ||
( currentKey[ Constants.Z_OBJECT_TYPE ] === Constants.Z_KEY_REFERENCE &&
key[ Constants.Z_OBJECT_TYPE ] === Constants.Z_KEY_REFERENCE &&
currentKey[ Constants.Z_KEY_REFERENCE_ID ] === key[ Constants.Z_KEY_REFERENCE_ID ] ) ) {
// To accommodate our current programming practices, we need to allow for either key here:
return entry[ Constants.Z_TYPED_OBJECT_ELEMENT_2 ] || entry[ Constants.Z_TYPED_PAIR_TYPE2 ];
}
}
}
/**
* Finds all of the ZIDs appearing in an arbitrary ZObject.
*
* @param {Object|string} zobject a Z1/Object
* @return {Set} Set of (string) ZIDs
*/
function extractZIDs( zobject ) {
const str = JSON.stringify( zobject );
// eslint-disable-next-line security/detect-unsafe-regex
const regexp = /"(Z[1-9]\d*)(K[1-9]\d*)?"/g;
const matches = [ ...str.matchAll( regexp ) ];
const allZids = matches.map( ( groups ) => groups[ 1 ] );
const uniqueZids = [ ...new Set( allZids ) ];
return uniqueZids;
}
/**
* Checks if a given zobject is a suberror (a zobject whose type is an instance of Z50/'Error type').
* If so, returns a JS object with keys errorType and (optionally) explanation. If not, returns null.
*
* The 'explanation' is an explanatory string for this suberror.
* Such strings are expected for Z500, but are also generated in the orchestrator for
* some other error types. In addition to explanatory strings, a few other useful keys
* with string values will show up here, e.g. Z503K1/'feature name' and Z504K1/ZID.
*
* Allows for the more relaxed Z5/Error format from the orchestrator, in which the suberror's
* type appears directly as the value of Z1K1/type, and also the stricter format, in which
* it appears in a function call to Z885/'Errortype to type'. Z885K1 is the 'errortype' key of Z885.
*
* @param {Object} zobject
* @return {Array} of objects
*/
function checkIfSuberror( zobject ) {
if ( typeof zobject === 'object' && zobject.Z1K1 && typeof zobject.Z1K1 === 'string' &&
zobject.Z1K1.match( errorTypeReferenceRe ) ) {
// Handle the relaxed Z5/Error format from the orchestrator
const suberror = {};
suberror.errorType = zobject.Z1K1;
const stringKey = suberror.errorType + 'K1';
const k1String = zobject[ stringKey ];
Eif ( k1String && isString( k1String ) && !isZid( k1String ) ) {
suberror.explanation = k1String;
}
return suberror;
} else if ( typeof zobject === 'object' && zobject.Z1K1 && typeof zobject.Z1K1 === 'object' &&
zobject.Z1K1.Z885K1 && typeof zobject.Z1K1.Z885K1 === 'string' &&
zobject.Z1K1.Z885K1.match( errorTypeReferenceRe ) ) {
const suberror = {};
suberror.errorType = zobject.Z1K1.Z885K1;
const stringKey = 'K1';
const k1String = zobject[ stringKey ];
Iif ( k1String && isString( k1String ) && !isZid( k1String ) ) {
suberror.explanation = k1String;
}
return suberror;
}
}
// These error types have no keys whose values contain nested error content. If a error type ZID
// appears here, extractErrorStructure will not search through any children of a zobject of that type.
const errorTypesNotToTraverse = new Set( [ 'Z501', 'Z505', 'Z508', 'Z511', 'Z512', 'Z513', 'Z516',
'Z531', 'Z532', 'Z533', 'Z534', 'Z535', 'Z536', 'Z537', 'Z542', 'Z547', 'Z548', 'Z551', 'Z553' ] );
/**
* Traverses a ZObject to find all the suberrors. (A suberror is a zobject
* whose type is an instance of Z50/'Error type'). Example:
* { Z1K1: 'Z500', Z500K1: 'Could not find argument Z811K1' }
* For each suberror found, the result includes a JS object with properties
* 'errorType', 'children', and (optionally) 'explanation'. Example:
* { errorType: 'Z500', explanation: 'Could not find argument Z811K1', children: [] }
*
* The 'children', if any, are additional suberrors found within the nested ZObjects of
* this suberror.
*
* zobject is normally a Z5 in the top level call, but doesn't have to be.
*
* @param {Object} zobject
* @return {Array} of objects
*/
function extractErrorStructure( zobject ) {
const subError = checkIfSuberror( zobject );
if ( subError ) {
if ( subError.explanation ) {
// In this special case, there won't be any nested suberrors; look no further
subError.children = [];
} else if ( errorTypesNotToTraverse.has( subError.errorType ) ) {
// Also in this case, there won't be any nested suberrors; look no further
subError.children = [];
} else {
subError.children = extractNestedSuberrors( zobject, subError.errorType );
}
return [ subError ];
}
return extractNestedSuberrors( zobject, null );
}
/**
* For each suberror type, these are its keys whose values should be included
* in the traversal conducted by extractNestedSuberrors(), because
* they may contain nested error content. We include both local and global
* forms of the keys, to make sure all currently generated errors are covered.
*
* If a suberror type isn't listed here, *all* of its keys' values will be traversed.
* It is not necessary for each suberror type to appear here, but if one does,
* it should *not* appear in errorTypesNotToTraverse.
*
* New error types will be handled without updating this map or errorTypesNotToTraverse
* (albeit not necessarily optimally).
*/
const errorKeysToTraverse = new Map( [
[ 'Z502', new Set( [ 'Z502K2', 'K2' ] ) ], // Not wellformed, [value]
[ 'Z506', new Set( [ 'Z506K4', 'K4' ] ) ], // Argument type mismatch, [propagated error]
[ 'Z507', new Set( [ 'Z507K2', 'K2' ] ) ], // Error in evaluation, [propagated error]
[ 'Z517', new Set( [ 'Z517K4', 'K4' ] ) ], // Return type mismatch, [propagated error]
[ 'Z518', new Set( [ 'Z518K3', 'K3' ] ) ] // Object type mismatch, [propagated error]
] );
/**
* Finds all suberrors in the children objects of the given zobject, as described for
* extractErrorStructure(). In that function we check whether the top-level
* object is a suberror; here we look at the children objects.
*
* Special-purpose function; only meant to be called from extractErrorStructure().
*
* @param {Object} zobject
* @param {string|null} errorType
* @return {Array} of objects
*/
function extractNestedSuberrors( zobject, errorType ) {
const nested = [];
if ( zobject !== null && typeof zobject === 'object' ) {
const keysToTraverse = errorKeysToTraverse.get( errorType );
// eslint-disable-next-line es-x/no-object-entries
Object.entries( zobject ).forEach( ( [ key, value ] ) => {
// We've already looked inside Z1K1/type; no need to look again
if ( key !== Constants.Z_OBJECT_TYPE &&
( keysToTraverse === undefined || keysToTraverse.has( key ) ) ) {
nested.push( ...extractErrorStructure( value ) );
}
} );
}
return nested;
}
module.exports = exports = {
methods: {
hybridToCanonical: hybridToCanonical,
canonicalToHybrid: canonicalToHybrid,
getValueFromCanonicalZMap: getValueFromCanonicalZMap,
extractErrorStructure: extractErrorStructure,
extractZIDs: extractZIDs
}
};
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