@apollo/client/utilities/graphql/fragments.js

A fully-featured caching GraphQL client.

import { __assign, __spreadArray } from "tslib";
import { invariant, InvariantError } from "../globals/index.js";
export function getFragmentQueryDocument(document, fragmentName) {
    var actualFragmentName = fragmentName;
    var fragments = [];
    document.definitions.forEach(function (definition) {
        if (definition.kind === 'OperationDefinition') {
            throw __DEV__ ? new InvariantError("Found a ".concat(definition.operation, " operation").concat(definition.name ? " named '".concat(definition.name.value, "'") : '', ". ") +
                'No operations are allowed when using a fragment as a query. Only fragments are allowed.') : new InvariantError(44);
        }
        if (definition.kind === 'FragmentDefinition') {
            fragments.push(definition);
        }
    });
    if (typeof actualFragmentName === 'undefined') {
        __DEV__ ? invariant(fragments.length === 1, "Found ".concat(fragments.length, " fragments. `fragmentName` must be provided when there is not exactly 1 fragment.")) : invariant(fragments.length === 1, 45);
        actualFragmentName = fragments[0].name.value;
    }
    var query = __assign(__assign({}, document), { definitions: __spreadArray([
            {
                kind: 'OperationDefinition',
                operation: 'query',
                selectionSet: {
                    kind: 'SelectionSet',
                    selections: [
                        {
                            kind: 'FragmentSpread',
                            name: {
                                kind: 'Name',
                                value: actualFragmentName,
                            },
                        },
                    ],
                },
            }
        ], document.definitions, true) });
    return query;
}
export function createFragmentMap(fragments) {
    if (fragments === void 0) { fragments = []; }
    var symTable = {};
    fragments.forEach(function (fragment) {
        symTable[fragment.name.value] = fragment;
    });
    return symTable;
}
export function getFragmentFromSelection(selection, fragmentMap) {
    switch (selection.kind) {
        case 'InlineFragment':
            return selection;
        case 'FragmentSpread': {
            var fragmentName = selection.name.value;
            if (typeof fragmentMap === "function") {
                return fragmentMap(fragmentName);
            }
            var fragment = fragmentMap && fragmentMap[fragmentName];
            __DEV__ ? invariant(fragment, "No fragment named ".concat(fragmentName)) : invariant(fragment, 46);
            return fragment || null;
        }
        default:
            return null;
    }
}
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