@apollo/client/utilities/internal/isStreamField.js

A fully-featured caching GraphQL client.

import { Kind } from "graphql";
import { cacheSizes } from "../caching/sizes.js";
import { canonicalStringify } from "./canonicalStringify.js";
import { memoize } from "./memoize.js";
/**
* @internal
* 
* @deprecated This is an internal API and should not be used directly. This can be removed or changed at any time.
*/
export const isStreamField = memoize(function isStreamField(field, variables) {
    return !!field.directives?.some((directive) => {
        if (directive.name.value !== "stream") {
            return false;
        }
        for (const arg of directive.arguments ?? []) {
            if (arg.name.value === "if") {
                switch (arg.value.kind) {
                    case Kind.BOOLEAN:
                        return arg.value.value;
                    case Kind.VARIABLE:
                        return !!variables?.[arg.value.name.value];
                }
            }
        }
        return true;
    });
}, {
    max: cacheSizes["isStreamField"] || 2000 /* defaultCacheSizes["isStreamField"] */,
    makeCacheKey: ([selection, variables]) => [
        selection,
        canonicalStringify(variables),
    ],
});
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