Function native_srixWriteBlock

src/modules/bjs_interpreter/rfid_js.cpp:411–517

}

JSValue native_srixWriteBlock(JSContext *ctx, JSValue *this_val, int argc, JSValue *argv) {
    // usage: srixWriteBlock(blockNum : number, blockData : string);
    // blockData must be 8 hex characters (4 bytes)
    // returns: { success: boolean, message: string }

    // Validate parameters
    if (argc < 2 || !JS_IsNumber(ctx, argv[0]) || !JS_IsString(ctx, argv[1])) {
        JSValue obj = JS_NewObject(ctx);
        JS_SetPropertyStr(ctx, obj, "success", JS_NewBool(false));
        JS_SetPropertyStr(
            ctx,
            obj,
            "message",
            JS_NewString(ctx, "Invalid parameters: blockNum (number) and blockData (string) required")
        );
        return obj;
    }

    int block_num;
    JS_ToInt32(ctx, &block_num, argv[0]);

    JSCStringBuf buf;
    const char *hex_data = JS_ToCString(ctx, argv[1], &buf);
    if (!hex_data) {
        JSValue obj = JS_NewObject(ctx);
        JS_SetPropertyStr(ctx, obj, "success", JS_NewBool(false));
        JS_SetPropertyStr(ctx, obj, "message", JS_NewString(ctx, "Failed to read blockData string"));
        return obj;
    }

    // Validate block number
    if (block_num < 0 || block_num > 127) {
        JSValue obj = JS_NewObject(ctx);
        JS_SetPropertyStr(ctx, obj, "success", JS_NewBool(false));
        JS_SetPropertyStr(ctx, obj, "message", JS_NewString(ctx, "Block number must be 0-127"));
        return obj;
    }

    // Validate hex data length (must be 8 characters = 4 bytes)
    if (strlen(hex_data) != 8) {
        JSValue obj = JS_NewObject(ctx);
        JS_SetPropertyStr(ctx, obj, "success", JS_NewBool(false));
        JS_SetPropertyStr(
            ctx, obj, "message", JS_NewString(ctx, "Block data must be 8 hex characters (4 bytes)")
        );
        return obj;
    }

    // Convert hex string to bytes
    uint8_t block_data[4];
    for (int i = 0; i < 4; i++) {
        char byte_str[3] = {hex_data[i * 2], hex_data[i * 2 + 1], '\0'};
        block_data[i] = (uint8_t)strtol(byte_str, NULL, 16);
    }

    // Write block
    SRIXTool *srixReader = getSRIXReader();
    int result = srixReader->write_single_block_headless((uint8_t)block_num, block_data);