Initial commit: C++20 SECS-II / HSMS / GEM client + server
A fully containerised SECS/GEM toolchain. Single docker compose project,
no host build tools. 63 unit-test cases / 278 assertions, two demo
executables, end-to-end two-container demo exercising every implemented
capability.
Architecture (bottom-up):
secs2/ E5 SECS-II codec
Item variant over L/A/B/BOOLEAN/I1-8/U1-8/F4/F8
encode/decode big-endian, 1/2/3-byte length encoding
Message SxFy + W-bit + optional root item
to_sml human-readable text rendering
hsms/ E37 HSMS transport (TCP)
Header 10-byte header + SType enum (Data/Select/Deselect/
Linktest/Reject/Separate)
Frame 4-byte length prefix + payload encode/decode
Connection async Asio TCP, NOT-SELECTED -> SELECTED state machine,
T3/T5/T6/T7/T8 timers, system-bytes reply correlation,
graceful close-after-flush separation
endpoint active Client (connect with T5 retry) and passive Server
(accept loop) wrappers over Connection
gem/ E30 GEM logic
ControlStateMachine 5-state E30 control model with operator
actions, host requests, SEMI-mandated ack
codes (OnlineAck, OfflineAck, CommAck), and
a state-change handler
EquipmentDataModel in-memory dictionary: SVIDs, DVIDs, ECIDs
(with EAC), CEIDs, report defs, CEID->report
links, enabled-events set, alarm table
(ALCD, enabled, active), process programs,
host command registry, clock (16-char
YYYYMMDDhhmmsscc with offset)
messages.hpp builders + parsers for every SxFy below
GEM message coverage (full list):
S1F1/F2 Are You There / On Line Data
S1F3/F4 Selected Equipment Status Request / Data
S1F11/F12 Status Variable Namelist Request / Data
S1F13/F14 Establish Communications (+ CommAck)
S1F15/F16 Request OFFLINE (+ OfflineAck)
S1F17/F18 Request ONLINE (+ OnlineAck)
S2F13/F14 Equipment Constant Request / Data
S2F15/F16 EC Send + EquipmentAck (Accept/UnknownEcid/Busy/OutOfRange)
S2F17/F18 Date and Time Request / Data
S2F29/F30 Equipment Constant Namelist Request / Data
S2F31/F32 Date and Time Set Request / TimeAck
S2F33/F34 Define Report + DefineReportAck (5 enum values)
S2F35/F36 Link Event Report + LinkEventAck
S2F37/F38 Enable / Disable Event Report + EnableEventAck
S2F41/F42 Host Command + HostCmdAck (7 values) + per-param CPACKs
S5F1/F2 Alarm Report Send + AlarmAck (ALCD bit-7 set/cleared
+ lower-7 category)
S5F3/F4 Enable/Disable Alarm Send + AlarmAck
S5F5/F6 List Alarms Request / Data (active alarms tagged in ALCD)
S6F11/F12 Event Report Send (equipment-initiated CEID emission
with full report data) + EventReportAck
S7F3/F4 Process Program Send + ProcessProgramAck (7 values)
S7F5/F6 Process Program Request / Data
S7F19/F20 Current EPPD List Request / Data
S10F1/F2 Terminal Display Single (host->equipment) + TerminalAck
S10F3/F4 Terminal Display Single (equipment->host)
Demo apps:
apps/secs_server.cpp passive equipment. Populates the data model
with 3 SVIDs (ControlState, Clock,
EventsEnabled), 2 ECIDs, 3 CEIDs
(ControlStateChanged, AlarmSetEvent,
ProcessStarted), 2 alarms (Chiller Temp High
cat 4, Door Open cat 1), 2 recipes
(RECIPE-A, RECIPE-B), and 4 host commands
(START, STOP, PAUSE, FAULT). Emits S6F11 on
every control state transition + on START;
emits S5F1 + the AlarmSetEvent CEID on FAULT.
Pushes an S10F3 welcome message when the host
comes online.
apps/secs_client.cpp active host. Walks 17 steps: Establish ->
Online -> S1F11 SVID namelist -> S1F3 read ->
S2F29 EC namelist -> S2F13 read ->
S2F17 clock -> S2F33/S2F35/S2F37 dynamic
event subscription -> S2F41 START
(-> receives S6F11) -> S5F5 alarm list ->
S5F3 enable alarm 1 -> S2F41 FAULT
(-> receives S5F1 + S6F11) -> S7F19/S7F5
recipe list + body -> S10F1 terminal ->
S1F15 Offline -> Separate. Handles inbound
S6F11, S5F1, S10F3 primaries.
Testing:
tests/test_secs2.cpp codec round-trip for every format,
byte-layout assertions for known values,
truncation/trailing-byte rejection,
nested list round-trip, SML rendering
tests/test_hsms.cpp header byte layout, data + control
header round-trip, full frame round-
trip with length prefix, short-payload
rejection
tests/test_control_state.cpp every (state, event) pair in the E30
control state machine, including
AlreadyOnline / NotAccept rejections
and idempotent offline-while-offline
tests/test_data_model.cpp SVID/ECID/Alarm/Recipe CRUD, clock
format + parse, host command registry,
full event-report pipeline (define ->
link -> enable -> compose) with
every error path (InvalidVid,
UnknownCeid, UnknownRptid), alarm
set/clear with ALCD bit-7 semantics
tests/test_messages.cpp round-trip + byte-layout for every
builder/parser pair, including S6F11
event reports with mixed item types
Toolchain:
Dockerfile Ubuntu 24.04, g++-13, CMake, Ninja, libasio-dev
docker-compose.yml builder / tests / server / client services,
source bind-mounted, build artifacts in a
named volume so the host tree stays clean
CMakeLists.txt C++20, -Wall -Wextra -Wpedantic, standalone
Asio (ASIO_STANDALONE), doctest via FetchContent
Documentation:
README.md architecture, quick start, demo log
COMPLIANCE.md honest per-capability E5/E30/E37 audit with
spec section refs. Calls out what's implemented,
what's partial (Reject.req, Alarms missing F7/F8,
EC range validation, PP without verify, terminal
single-line only), and what's intentionally not
yet implemented (spooling, S9 error stream,
Documentation S1F19/F20+F21/F22, limits monitoring,
trace data collection, multi-block, material
movement). Does NOT claim "100% GEM-compliant" and
lists the work required to honestly make that claim.
This is Layer 0 + the start of Layer 1 from implementation_plan.md.
The transition-table-driven "spec-as-data" architecture (Layer 1
proper) is not yet implemented; the current code uses imperative
state machines that are structurally ready to be refactored onto
tables.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
This commit is contained in:
@@ -0,0 +1,126 @@
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#include "secsgem/gem/control_state.hpp"
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namespace secsgem::gem {
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const char* control_state_name(ControlState s) {
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switch (s) {
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case ControlState::EquipmentOffline: return "EquipmentOffline";
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case ControlState::AttemptOnline: return "AttemptOnline";
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case ControlState::HostOffline: return "HostOffline";
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case ControlState::OnlineLocal: return "OnlineLocal";
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case ControlState::OnlineRemote: return "OnlineRemote";
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}
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return "?";
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}
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bool is_online(ControlState s) {
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return s == ControlState::OnlineLocal || s == ControlState::OnlineRemote;
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}
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const char* control_event_name(ControlEvent e) {
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switch (e) {
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case ControlEvent::OperatorSwitchOnline: return "OperatorSwitchOnline";
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case ControlEvent::OperatorSwitchOffline: return "OperatorSwitchOffline";
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case ControlEvent::OperatorSwitchLocal: return "OperatorSwitchLocal";
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case ControlEvent::OperatorSwitchRemote: return "OperatorSwitchRemote";
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case ControlEvent::AttemptComplete: return "AttemptComplete";
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case ControlEvent::AttemptFailed: return "AttemptFailed";
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case ControlEvent::HostRequestOnline: return "HostRequestOnline";
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case ControlEvent::HostRequestOffline: return "HostRequestOffline";
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}
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return "?";
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}
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ControlStateMachine::ControlStateMachine() : ControlStateMachine(Config{}) {}
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ControlStateMachine::ControlStateMachine(Config cfg)
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: cfg_(cfg), state_(cfg.initial) {}
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void ControlStateMachine::transition(ControlState next, ControlEvent trigger) {
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if (state_ == next) return;
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const ControlState prev = state_;
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state_ = next;
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if (on_change_) on_change_(prev, next, trigger);
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}
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bool ControlStateMachine::operator_online() {
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switch (state_) {
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case ControlState::EquipmentOffline:
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case ControlState::HostOffline:
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transition(ControlState::AttemptOnline, ControlEvent::OperatorSwitchOnline);
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transition(cfg_.operator_default_remote ? ControlState::OnlineRemote
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: ControlState::OnlineLocal,
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ControlEvent::AttemptComplete);
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return true;
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case ControlState::AttemptOnline:
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case ControlState::OnlineLocal:
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case ControlState::OnlineRemote:
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return false;
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}
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return false;
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}
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bool ControlStateMachine::operator_offline() {
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switch (state_) {
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case ControlState::OnlineLocal:
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case ControlState::OnlineRemote:
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case ControlState::AttemptOnline:
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transition(ControlState::HostOffline, ControlEvent::OperatorSwitchOffline);
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return true;
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case ControlState::EquipmentOffline:
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case ControlState::HostOffline:
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return false;
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}
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return false;
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}
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bool ControlStateMachine::operator_local() {
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if (state_ == ControlState::OnlineRemote) {
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transition(ControlState::OnlineLocal, ControlEvent::OperatorSwitchLocal);
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return true;
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}
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return false;
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}
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bool ControlStateMachine::operator_remote() {
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if (state_ == ControlState::OnlineLocal) {
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transition(ControlState::OnlineRemote, ControlEvent::OperatorSwitchRemote);
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return true;
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}
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return false;
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}
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OnlineAck ControlStateMachine::on_host_request_online() {
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switch (state_) {
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case ControlState::HostOffline:
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transition(ControlState::AttemptOnline, ControlEvent::HostRequestOnline);
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transition(cfg_.host_request_grants_remote ? ControlState::OnlineRemote
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: ControlState::OnlineLocal,
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ControlEvent::AttemptComplete);
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return OnlineAck::Accept;
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case ControlState::OnlineLocal:
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case ControlState::OnlineRemote:
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return OnlineAck::AlreadyOnline;
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case ControlState::EquipmentOffline:
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case ControlState::AttemptOnline:
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return OnlineAck::NotAccept;
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}
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return OnlineAck::NotAccept;
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}
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OfflineAck ControlStateMachine::on_host_request_offline() {
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switch (state_) {
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case ControlState::OnlineLocal:
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case ControlState::OnlineRemote:
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transition(ControlState::HostOffline, ControlEvent::HostRequestOffline);
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return OfflineAck::Accept;
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case ControlState::EquipmentOffline:
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case ControlState::AttemptOnline:
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case ControlState::HostOffline:
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// Idempotent: already offline from host's point of view.
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return OfflineAck::Accept;
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}
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return OfflineAck::Accept;
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}
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} // namespace secsgem::gem
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@@ -0,0 +1,339 @@
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#include "secsgem/gem/data_model.hpp"
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#include <array>
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#include <chrono>
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#include <cstdio>
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#include <ctime>
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namespace secsgem::gem {
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// ---- SVIDs ---------------------------------------------------------------
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void EquipmentDataModel::add_status_variable(StatusVariable sv) {
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const uint32_t id = sv.id;
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svids_.insert_or_assign(id, std::move(sv));
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}
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std::optional<StatusVariable> EquipmentDataModel::status_variable(uint32_t id) const {
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auto it = svids_.find(id);
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if (it == svids_.end()) return std::nullopt;
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return it->second;
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}
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std::vector<StatusVariable> EquipmentDataModel::all_status_variables() const {
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std::vector<StatusVariable> out;
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out.reserve(svids_.size());
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for (const auto& [_, sv] : svids_) out.push_back(sv);
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return out;
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}
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void EquipmentDataModel::set_status_value(uint32_t id, s2::Item value) {
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auto it = svids_.find(id);
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if (it != svids_.end()) it->second.value = std::move(value);
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}
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// ---- DVIDs ---------------------------------------------------------------
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void EquipmentDataModel::add_data_variable(DataVariable dv) {
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const uint32_t id = dv.id;
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dvids_.insert_or_assign(id, std::move(dv));
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}
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std::optional<DataVariable> EquipmentDataModel::data_variable(uint32_t id) const {
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auto it = dvids_.find(id);
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if (it == dvids_.end()) return std::nullopt;
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return it->second;
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}
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std::vector<DataVariable> EquipmentDataModel::all_data_variables() const {
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std::vector<DataVariable> out;
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out.reserve(dvids_.size());
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for (const auto& [_, dv] : dvids_) out.push_back(dv);
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return out;
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}
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void EquipmentDataModel::set_data_value(uint32_t id, s2::Item value) {
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auto it = dvids_.find(id);
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if (it != dvids_.end()) it->second.value = std::move(value);
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}
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std::optional<s2::Item> EquipmentDataModel::vid_value(uint32_t vid) const {
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if (auto it = svids_.find(vid); it != svids_.end()) return it->second.value;
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if (auto it = dvids_.find(vid); it != dvids_.end()) return it->second.value;
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return std::nullopt;
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}
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bool EquipmentDataModel::vid_exists(uint32_t vid) const {
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return svids_.count(vid) || dvids_.count(vid);
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}
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// ---- ECIDs ---------------------------------------------------------------
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void EquipmentDataModel::add_equipment_constant(EquipmentConstant ec) {
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const uint32_t id = ec.id;
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ecids_.insert_or_assign(id, std::move(ec));
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}
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std::optional<EquipmentConstant> EquipmentDataModel::equipment_constant(uint32_t id) const {
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auto it = ecids_.find(id);
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if (it == ecids_.end()) return std::nullopt;
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return it->second;
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}
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std::vector<EquipmentConstant> EquipmentDataModel::all_equipment_constants() const {
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std::vector<EquipmentConstant> out;
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out.reserve(ecids_.size());
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for (const auto& [_, ec] : ecids_) out.push_back(ec);
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return out;
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}
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EquipmentAck EquipmentDataModel::set_equipment_constant_value(uint32_t id, s2::Item value) {
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auto it = ecids_.find(id);
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if (it == ecids_.end()) return EquipmentAck::Denied_UnknownEcid;
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it->second.value = std::move(value);
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return EquipmentAck::Accept;
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}
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// ---- Clock ---------------------------------------------------------------
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std::string EquipmentDataModel::current_time_string() const {
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using namespace std::chrono;
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const auto now = system_clock::now() + seconds(time_offset_seconds_);
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const auto t = system_clock::to_time_t(now);
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const auto ms = duration_cast<milliseconds>(now.time_since_epoch()) % 1000;
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std::tm tm{};
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gmtime_r(&t, &tm);
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std::array<char, 64> buf{};
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std::snprintf(buf.data(), buf.size(), "%04d%02d%02d%02d%02d%02d%02d",
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tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday,
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tm.tm_hour, tm.tm_min, tm.tm_sec,
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static_cast<int>(ms.count() / 10));
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return std::string(buf.data());
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}
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namespace {
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bool parse_uint(const char* p, std::size_t n, int& out) {
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int v = 0;
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for (std::size_t i = 0; i < n; ++i) {
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if (p[i] < '0' || p[i] > '9') return false;
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v = v * 10 + (p[i] - '0');
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}
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out = v;
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return true;
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}
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} // namespace
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TimeAck EquipmentDataModel::set_time_string(const std::string& s) {
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if (s.size() != 14 && s.size() != 16) return TimeAck::Error;
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int y, mo, d, h, mi, se;
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if (!parse_uint(s.data() + 0, 4, y) ||
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!parse_uint(s.data() + 4, 2, mo) ||
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!parse_uint(s.data() + 6, 2, d) ||
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!parse_uint(s.data() + 8, 2, h) ||
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!parse_uint(s.data() + 10, 2, mi) ||
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!parse_uint(s.data() + 12, 2, se)) {
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return TimeAck::Error;
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}
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std::tm tm{};
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tm.tm_year = y - 1900;
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tm.tm_mon = mo - 1;
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tm.tm_mday = d;
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tm.tm_hour = h;
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tm.tm_min = mi;
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tm.tm_sec = se;
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const std::time_t target = timegm(&tm);
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if (target == static_cast<std::time_t>(-1)) return TimeAck::Error;
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const std::time_t now = std::time(nullptr);
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time_offset_seconds_ = static_cast<std::int64_t>(target - now);
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return TimeAck::Accept;
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}
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// ---- Host commands -------------------------------------------------------
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void EquipmentDataModel::register_command(const std::string& rcmd, HostCommandHandler handler) {
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commands_.insert_or_assign(rcmd, std::move(handler));
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}
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bool EquipmentDataModel::has_command(const std::string& rcmd) const {
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return commands_.find(rcmd) != commands_.end();
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}
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HostCmdAck EquipmentDataModel::dispatch_command(
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const std::string& rcmd, const std::vector<CommandParam>& params) const {
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auto it = commands_.find(rcmd);
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if (it == commands_.end()) return HostCmdAck::InvalidCommand;
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return it->second(params);
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}
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// ---- Collection events ---------------------------------------------------
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void EquipmentDataModel::register_event(CollectionEvent ce) {
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const uint32_t id = ce.id;
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ceids_.insert_or_assign(id, std::move(ce));
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}
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bool EquipmentDataModel::has_event(uint32_t ceid) const { return ceids_.count(ceid); }
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std::vector<CollectionEvent> EquipmentDataModel::all_events() const {
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std::vector<CollectionEvent> out;
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out.reserve(ceids_.size());
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for (const auto& [_, e] : ceids_) out.push_back(e);
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return out;
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}
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DefineReportAck EquipmentDataModel::define_reports(
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const std::vector<std::pair<uint32_t, std::vector<uint32_t>>>& reports) {
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// Empty outer list deletes all reports (and links).
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if (reports.empty()) {
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reports_.clear();
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ce_links_.clear();
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return DefineReportAck::Accept;
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}
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// Validate first; commit only on full success.
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for (const auto& [rptid, vids] : reports) {
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if (vids.empty()) continue; // delete-report row is always valid
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for (auto v : vids)
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if (!vid_exists(v)) return DefineReportAck::InvalidVid;
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}
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for (const auto& [rptid, vids] : reports) {
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if (vids.empty()) {
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reports_.erase(rptid);
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// Drop the RPTID from any links.
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for (auto& [ceid, rpts] : ce_links_) {
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rpts.erase(std::remove(rpts.begin(), rpts.end(), rptid), rpts.end());
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}
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} else {
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reports_.insert_or_assign(rptid, Report{rptid, vids});
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}
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}
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return DefineReportAck::Accept;
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}
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LinkEventAck EquipmentDataModel::link_event_reports(
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const std::vector<std::pair<uint32_t, std::vector<uint32_t>>>& links) {
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if (links.empty()) {
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ce_links_.clear();
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return LinkEventAck::Accept;
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}
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for (const auto& [ceid, rpts] : links) {
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if (!has_event(ceid)) return LinkEventAck::UnknownCeid;
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for (auto r : rpts)
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if (!reports_.count(r)) return LinkEventAck::UnknownRptid;
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}
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for (const auto& [ceid, rpts] : links) {
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if (rpts.empty()) {
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ce_links_.erase(ceid);
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} else {
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ce_links_[ceid] = rpts;
|
||||
}
|
||||
}
|
||||
return LinkEventAck::Accept;
|
||||
}
|
||||
|
||||
EnableEventAck EquipmentDataModel::enable_events(bool enable,
|
||||
const std::vector<uint32_t>& ceids) {
|
||||
if (ceids.empty()) {
|
||||
if (enable) {
|
||||
for (const auto& [id, _] : ceids_) events_enabled_.insert(id);
|
||||
} else {
|
||||
events_enabled_.clear();
|
||||
}
|
||||
return EnableEventAck::Accept;
|
||||
}
|
||||
for (auto id : ceids)
|
||||
if (!has_event(id)) return EnableEventAck::UnknownCeid;
|
||||
for (auto id : ceids) {
|
||||
if (enable) events_enabled_.insert(id);
|
||||
else events_enabled_.erase(id);
|
||||
}
|
||||
return EnableEventAck::Accept;
|
||||
}
|
||||
|
||||
bool EquipmentDataModel::is_event_enabled(uint32_t ceid) const {
|
||||
return events_enabled_.count(ceid) > 0;
|
||||
}
|
||||
|
||||
std::vector<ReportData> EquipmentDataModel::compose_reports_for(uint32_t ceid) const {
|
||||
std::vector<ReportData> out;
|
||||
auto it = ce_links_.find(ceid);
|
||||
if (it == ce_links_.end()) return out;
|
||||
for (auto rptid : it->second) {
|
||||
auto rit = reports_.find(rptid);
|
||||
if (rit == reports_.end()) continue;
|
||||
ReportData rd{rptid, {}};
|
||||
for (auto vid : rit->second.vids) {
|
||||
auto v = vid_value(vid);
|
||||
rd.values.push_back(v ? *v : s2::Item::list({}));
|
||||
}
|
||||
out.push_back(std::move(rd));
|
||||
}
|
||||
return out;
|
||||
}
|
||||
|
||||
std::vector<Report> EquipmentDataModel::all_reports() const {
|
||||
std::vector<Report> out;
|
||||
out.reserve(reports_.size());
|
||||
for (const auto& [_, r] : reports_) out.push_back(r);
|
||||
return out;
|
||||
}
|
||||
|
||||
// ---- Alarms --------------------------------------------------------------
|
||||
|
||||
void EquipmentDataModel::add_alarm(Alarm a) {
|
||||
const uint32_t id = a.id;
|
||||
alarms_.insert_or_assign(id, std::move(a));
|
||||
}
|
||||
std::optional<Alarm> EquipmentDataModel::alarm(uint32_t alid) const {
|
||||
auto it = alarms_.find(alid);
|
||||
if (it == alarms_.end()) return std::nullopt;
|
||||
return it->second;
|
||||
}
|
||||
std::vector<Alarm> EquipmentDataModel::all_alarms() const {
|
||||
std::vector<Alarm> out;
|
||||
out.reserve(alarms_.size());
|
||||
for (const auto& [_, a] : alarms_) out.push_back(a);
|
||||
return out;
|
||||
}
|
||||
AlarmAck EquipmentDataModel::set_alarm_enabled(uint32_t alid, bool enable) {
|
||||
if (!alarms_.count(alid)) return AlarmAck::Error;
|
||||
if (enable) alarms_enabled_.insert(alid);
|
||||
else alarms_enabled_.erase(alid);
|
||||
return AlarmAck::Accept;
|
||||
}
|
||||
bool EquipmentDataModel::alarm_enabled(uint32_t alid) const {
|
||||
return alarms_enabled_.count(alid) > 0;
|
||||
}
|
||||
|
||||
std::optional<uint8_t> EquipmentDataModel::alarm_set(uint32_t alid) {
|
||||
auto it = alarms_.find(alid);
|
||||
if (it == alarms_.end()) return std::nullopt;
|
||||
alarms_active_.insert(alid);
|
||||
return static_cast<uint8_t>((it->second.severity_category & 0x7F) | 0x80);
|
||||
}
|
||||
std::optional<uint8_t> EquipmentDataModel::alarm_clear(uint32_t alid) {
|
||||
auto it = alarms_.find(alid);
|
||||
if (it == alarms_.end()) return std::nullopt;
|
||||
alarms_active_.erase(alid);
|
||||
return static_cast<uint8_t>(it->second.severity_category & 0x7F);
|
||||
}
|
||||
bool EquipmentDataModel::alarm_active(uint32_t alid) const {
|
||||
return alarms_active_.count(alid) > 0;
|
||||
}
|
||||
|
||||
// ---- Process programs ----------------------------------------------------
|
||||
|
||||
void EquipmentDataModel::add_process_program(std::string ppid, std::string ppbody) {
|
||||
process_programs_.insert_or_assign(std::move(ppid), std::move(ppbody));
|
||||
}
|
||||
std::optional<std::string> EquipmentDataModel::process_program(const std::string& ppid) const {
|
||||
auto it = process_programs_.find(ppid);
|
||||
if (it == process_programs_.end()) return std::nullopt;
|
||||
return it->second;
|
||||
}
|
||||
std::vector<std::string> EquipmentDataModel::process_program_list() const {
|
||||
std::vector<std::string> out;
|
||||
out.reserve(process_programs_.size());
|
||||
for (const auto& [k, _] : process_programs_) out.push_back(k);
|
||||
return out;
|
||||
}
|
||||
ProcessProgramAck EquipmentDataModel::delete_process_program(const std::string& ppid) {
|
||||
if (!process_programs_.count(ppid)) return ProcessProgramAck::PpidNotFound;
|
||||
process_programs_.erase(ppid);
|
||||
return ProcessProgramAck::Accept;
|
||||
}
|
||||
|
||||
} // namespace secsgem::gem
|
||||
Reference in New Issue
Block a user