Add SnapmakerPrinterAgent with filament sync support

Introduce SnapmakerPrinterAgent as a MoonrakerPrinterAgent subclass
that handles Snapmaker UI -specific filament detection

src/slic3r/Utils/SnapmakerPrinterAgent.cpp

@@ -0,0 +1,157 @@
+#include "SnapmakerPrinterAgent.hpp"
+#include "Http.hpp"
+
+#include "nlohmann/json.hpp"
+#include <boost/log/trivial.hpp>
+
+namespace Slic3r {
+
+namespace {
+
+constexpr const char* SNAPMAKER_AGENT_VERSION = "0.0.1";
+
+// Safely access a parallel array by index, returning a fallback if out of bounds.
+template<typename T>
+T safe_at(const std::vector<T>& vec, int index, const T& fallback)
+{
+    return (index >= 0 && index < static_cast<int>(vec.size())) ? vec[index] : fallback;
+}
+
+} // anonymous namespace
+
+SnapmakerPrinterAgent::SnapmakerPrinterAgent(std::string log_dir) : MoonrakerPrinterAgent(std::move(log_dir)) {}
+
+AgentInfo SnapmakerPrinterAgent::get_agent_info_static()
+{
+    return AgentInfo{"snapmaker", "Snapmaker Printer Agent", SNAPMAKER_AGENT_VERSION, "Snapmaker printer agent"};
+}
+
+std::string SnapmakerPrinterAgent::combine_filament_type(const std::string& type, const std::string& sub_type)
+{
+    const std::string base = trim_and_upper(type);
+    const std::string sub  = trim_and_upper(sub_type);
+
+    if (base.empty())
+        return "PLA";
+
+    if (sub.empty() || sub == "NONE")
+        return base;
+
+    if (sub == "CF")
+        return base + "-CF";
+    if (sub == "GF")
+        return base + "-GF";
+    if (sub == "SILK")
+        return base + " SILK";
+    if (sub == "SNAPSPEED" || sub == "HS")
+        return base + " HIGH SPEED";
+
+    // Unrecognized sub-type (brand names like Polylite, Basic, etc.) -- use base type only
+    return base;
+}
+
+bool SnapmakerPrinterAgent::fetch_filament_info(std::string dev_id)
+{
+    std::string url = join_url(device_info.base_url, "/printer/objects/query?print_task_config&filament_detect");
+
+    std::string response_body;
+    bool        success = false;
+    std::string http_error;
+
+    auto http = Http::get(url);
+    if (!device_info.api_key.empty()) {
+        http.header("X-Api-Key", device_info.api_key);
+    }
+    http.timeout_connect(5)
+        .timeout_max(10)
+        .on_complete([&](std::string body, unsigned status) {
+            if (status == 200) {
+                response_body = body;
+                success       = true;
+            } else {
+                http_error = "HTTP error: " + std::to_string(status);
+            }
+        })
+        .on_error([&](std::string body, std::string err, unsigned status) {
+            http_error = err;
+            if (status > 0) {
+                http_error += " (HTTP " + std::to_string(status) + ")";
+            }
+        })
+        .perform_sync();
+
+    if (!success) {
+        BOOST_LOG_TRIVIAL(warning) << "SnapmakerPrinterAgent::fetch_filament_info: HTTP request failed: " << http_error;
+        return false;
+    }
+
+    auto json = nlohmann::json::parse(response_body, nullptr, false, true);
+    if (json.is_discarded()) {
+        BOOST_LOG_TRIVIAL(warning) << "SnapmakerPrinterAgent::fetch_filament_info: Invalid JSON response";
+        return false;
+    }
+
+    // Navigate to result.status.print_task_config
+    if (!json.contains("result") || !json["result"].contains("status") ||
+        !json["result"]["status"].contains("print_task_config")) {
+        BOOST_LOG_TRIVIAL(warning) << "SnapmakerPrinterAgent::fetch_filament_info: Missing print_task_config in response";
+        return false;
+    }
+
+    auto& ptc = json["result"]["status"]["print_task_config"];
+
+    // Read parallel arrays from print_task_config
+    auto filament_exist    = ptc.value("filament_exist", std::vector<bool>{});
+    auto filament_type     = ptc.value("filament_type", std::vector<std::string>{});
+    auto filament_sub_type = ptc.value("filament_sub_type", std::vector<std::string>{});
+    auto filament_color    = ptc.value("filament_color_rgba", std::vector<std::string>{});
+
+    const int slot_count = static_cast<int>(filament_exist.size());
+    if (slot_count == 0) {
+        BOOST_LOG_TRIVIAL(info) << "SnapmakerPrinterAgent::fetch_filament_info: No filament slots reported";
+        return false;
+    }
+
+    // Read NFC filament_detect data for temperature info (optional)
+    nlohmann::json nfc_info;
+    if (json["result"]["status"].contains("filament_detect") &&
+        json["result"]["status"]["filament_detect"].contains("info")) {
+        nfc_info = json["result"]["status"]["filament_detect"]["info"];
+    }
+
+    static const std::string empty_str;
+    static const std::string default_color = "FFFFFFFF";
+
+    std::vector<AmsTrayData> trays;
+    trays.reserve(slot_count);
+
+    for (int i = 0; i < slot_count; ++i) {
+        AmsTrayData tray;
+        tray.slot_index   = i;
+        tray.has_filament = filament_exist[i];
+
+        if (tray.has_filament) {
+            tray.tray_type     = combine_filament_type(safe_at(filament_type, i, empty_str),
+                                                       safe_at(filament_sub_type, i, empty_str));
+            tray.tray_info_idx = map_filament_type_to_generic_id(tray.tray_type);
+            tray.tray_color    = safe_at(filament_color, i, default_color);
+
+            // Extract NFC temperature data if available
+            if (nfc_info.is_array() && i < static_cast<int>(nfc_info.size()) && nfc_info[i].is_object()) {
+                auto& nfc_slot = nfc_info[i];
+                std::string vendor = nfc_slot.value("VENDOR", "NONE");
+                if (vendor != "NONE" && !vendor.empty()) {
+                    tray.bed_temp    = nfc_slot.value("BED_TEMP", 0);
+                    tray.nozzle_temp = nfc_slot.value("FIRST_LAYER_TEMP", 0);
+                }
+            }
+        }
+
+        trays.emplace_back(std::move(tray));
+    }
+
+    build_ams_payload(1, slot_count - 1, trays);
+    return true;
+}
+
+} // namespace Slic3r