Function generateGoSessionEventsCode

scripts/codegen/go.ts:3105–3434

(
    schema: JSONSchema7,
    packageName: string,
    externalSchemas?: Record<string, JSONSchema7>
)

 * Generate the complete Go session-events file content.
 */
export function generateGoSessionEventsCode(
    schema: JSONSchema7,
    packageName: string,
    externalSchemas?: Record<string, JSONSchema7>
): GoGeneratedTypeCode {
    const variants = extractGoEventVariants(schema);
    const ctx: GoCodegenCtx = {
        structs: [],
        encoding: [],
        enums: [],
        enumsByName: new Map(),
        discriminatedUnions: new Map(),
        generatedNames: new Set(),
        definitions: collectDefinitionCollections(schema as Record<string, unknown>),
        wrapComments: false,
        discriminatedUnionRawVariantSuffix: "",
        packageName,
    };
    registerGoExternalUnionUnmarshalers(schema, ctx, externalSchemas);
    const envelopeProperties = getGoSharedEventEnvelopeProperties(schema, ctx);
    const sessionEventStructFields = [
        ...envelopeProperties.map((property) => ({
            fieldName: property.fieldName,
            lines: emitGoEnvelopeStructField(property, true, ctx.wrapComments !== false),
        })),
        {
            fieldName: "Data",
            lines: [
                ...goCommentLines("Typed event payload. Use a type switch to access per-event fields.", "\t", ctx.wrapComments !== false),
                `\tData SessionEventData \`json:"-"\``,
            ],
        },
    ].sort((left, right) => compareGoFieldNames(left.fieldName, right.fieldName));
    const rawEventUnmarshalFields = [
        ...envelopeProperties.map((property) => ({
            fieldName: property.fieldName,
            lines: emitGoEnvelopeStructField(property, false, ctx.wrapComments !== false),
        })),
        { fieldName: "Data", lines: [`\tData json.RawMessage \`json:"data"\``] },
        { fieldName: "Type", lines: [`\tType SessionEventType \`json:"type"\``] },
    ].sort((left, right) => compareGoFieldNames(left.fieldName, right.fieldName));
    const rawEventMarshalFields = [
        ...envelopeProperties.map((property) => ({
            fieldName: property.fieldName,
            lines: emitGoEnvelopeStructField(property, false, ctx.wrapComments !== false),
        })),
        { fieldName: "Data", lines: [`\tData any \`json:"data"\``] },
        { fieldName: "Type", lines: [`\tType SessionEventType \`json:"type"\``] },
    ].sort((left, right) => compareGoFieldNames(left.fieldName, right.fieldName));

    // Generate per-event data structs
    const dataStructs: string[] = [];
    for (const variant of variants) {
        const required = new Set(variant.dataSchema.required || []);
        const lines: string[] = [];

        if (variant.dataDescription) {
            pushGoCommentForContext(lines, variant.dataDescription, ctx);