Function goVariantTargetedMatchSpec

scripts/codegen/go.ts:1434–1477

(
    variant: GoDiscriminatedUnionVariant,
    groupVariants: GoDiscriminatedUnionVariant[],
    discriminatorProp: string,
    ctx: GoCodegenCtx
)

}

function goVariantTargetedMatchSpec(
    variant: GoDiscriminatedUnionVariant,
    groupVariants: GoDiscriminatedUnionVariant[],
    discriminatorProp: string,
    ctx: GoCodegenCtx
): GoVariantMatchSpec {
    const termsByVariant = new Map<string, GoJSONMatchTerm[]>();
    const termCounts = new Map<string, number>();

    for (const groupVariant of groupVariants) {
        const terms = goCollectRequiredJSONMatchTerms(groupVariant.schema, ctx, discriminatorProp);
        termsByVariant.set(groupVariant.typeName, terms);
        for (const term of terms) {
            const key = goJSONMatchTermKey(term);
            termCounts.set(key, (termCounts.get(key) ?? 0) + 1);
        }
    }

    const variantTerms = termsByVariant.get(variant.typeName) ?? [];
    const uniqueTerms = variantTerms.filter((term) => (termCounts.get(goJSONMatchTermKey(term)) ?? 0) < groupVariants.length);
    const positiveTerms = removeRedundantGoJSONExistsTerms(uniqueTerms).sort(compareGoJSONMatchTerms);

    const variantPositivePathKeys = new Set(positiveTerms.map((term) => goJSONMatchPathKey(term.path)));
    const peerPositivePathKeys = new Set<string>();
    const peerPositivePaths: string[][] = [];
    for (const groupVariant of groupVariants) {
        if (groupVariant.typeName === variant.typeName) continue;
        const groupTerms = termsByVariant.get(groupVariant.typeName) ?? [];
        const peerUniqueTerms = removeRedundantGoJSONExistsTerms(
            groupTerms.filter((term) => (termCounts.get(goJSONMatchTermKey(term)) ?? 0) < groupVariants.length)
        );
        for (const term of peerUniqueTerms) {
            const pathKey = goJSONMatchPathKey(term.path);
            if (variantPositivePathKeys.has(pathKey) || peerPositivePathKeys.has(pathKey)) continue;
            peerPositivePathKeys.add(pathKey);
            peerPositivePaths.push(term.path);
        }
    }

    return {
        positiveTerms,
        negativeExistsPaths: peerPositivePaths.sort(compareGoJSONPaths),
    };
}

function goJSONMatchTermParentPath(term: GoJSONMatchTerm): string[] {
    return term.path.slice(0, -1);