commit 9862103dd3c885ac0eee2a86542ecaee6390d190 · kitten.sh/graphql-web-lite

+63 -2
alias/language/visitor.mjs
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       export { getEnterLeaveForKind, getVisitFn, visitInParallel } from 'graphql/language/visitor';

     

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       import { BREAK, Kind } from '@0no-co/graphql.web';

     

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       import { getEnterLeaveForKind } from 'graphql/language/visitor';

     

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       export { getEnterLeaveForKind, getVisitFn } from 'graphql/language/visitor';

     

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       export { BREAK, visit, Kind } from '@0no-co/graphql.web';

     

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       export function visitInParallel(visitors) {

     

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         const skipping = new Array(visitors.length).fill(null);

     

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         const mergedVisitor = Object.create(null);

     

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         for (const kind of Object.values(Kind)) {

     

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           let hasVisitor = false;

     

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           const enterList = new Array(visitors.length).fill(undefined);

     

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           const leaveList = new Array(visitors.length).fill(undefined);

     

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           for (let i = 0; i < visitors.length; ++i) {

     

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             const { enter, leave } = getEnterLeaveForKind(visitors[i], kind);

     

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             hasVisitor = hasVisitor || enter != null || leave != null;

     

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             enterList[i] = enter;

     

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             leaveList[i] = leave;

     

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           }

     

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           if (!hasVisitor) {

     

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             continue;

     

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           }

     

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           const mergedEnterLeave = {

     

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             enter(...args) {

     

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               const node = args[0];

     

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               for (let i = 0; i < visitors.length; i++) {

     

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                 if (skipping[i] === null) {

     

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                   const result = enterList[i] && enterList[i].apply(visitors[i], args);

     

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                   if (result === false) {

     

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                     skipping[i] = node;

     

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                   } else if (result === BREAK) {

     

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                     skipping[i] = BREAK;

     

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                   } else if (result !== undefined) {

     

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                     return result;

     

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                   }

     

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                 }

     

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               }

     

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             },

     

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             leave(...args) {

     

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               const node = args[0];

     

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               for (let i = 0; i < visitors.length; i++) {

     

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                 if (skipping[i] === null) {

     

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                   const result = leaveList[i] && leaveList[i].apply(visitors[i], args);

     

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                   if (result === BREAK) {

     

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                     skipping[i] = BREAK;

     

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                   } else if (result !== undefined && result !== false) {

     

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                     return result;

     

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                   }

     

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                 } else if (skipping[i] === node) {

     

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                   skipping[i] = null;

     

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                 }

     

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               }

     

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             },

     

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           };

     

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       export { BREAK, visit } from '@0no-co/graphql.web';

     

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           mergedVisitor[kind] = mergedEnterLeave;

     

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         }

     

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         return mergedVisitor;

     

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       }