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46 lines
1.3 KiB
JavaScript
46 lines
1.3 KiB
JavaScript
"use strict";
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// Simple data type to represent a query path and corresponding schema path tied together, because these are basically always used together, and it would bloat up the implementation code otherwise
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function createInstance({ queryPath, schemaPath, queryObject, schemaObject }) {
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return {
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queryPath: queryPath,
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schemaPath: schemaPath,
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query: queryObject,
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schema: schemaObject,
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child: function (queryKey, schemaKey, { queryOverride, schemaOverride } = {}) {
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return createInstance({
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queryPath: (queryKey != null)
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? queryPath.concat([ queryKey ])
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: queryPath,
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schemaPath: (schemaKey != null)
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? schemaPath.concat([ schemaKey ])
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: schemaPath,
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queryObject: queryOverride ?? queryObject[queryKey],
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schemaObject: schemaOverride ?? schemaObject[schemaKey]
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});
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},
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toPathString: function () {
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return queryPath
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.map((segment, i) => {
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if (segment === schemaPath[i]) {
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return segment;
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} else {
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// This is used for representing aliases, showing the original schema key in brackets
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return `${segment} [${schemaPath[i]}]`;
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}
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})
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.join(" -> ");
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}
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};
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}
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module.exports = function createCursor({ query, schema }) {
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return createInstance({
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queryPath: [],
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schemaPath: [],
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queryObject: query,
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schemaObject: schema
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});
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};
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