[Domain] flag walls and obstacles blocking connection passages

CMakeLists.txt

@@ -159,6 +159,7 @@ if (BUILD_TESTING)
         tests/EcsCoreTests.cpp
         tests/ImportContractsTests.cpp
         tests/DxfImportServiceTests.cpp
+        tests/ImportValidationServiceTests.cpp
         tests/DemoFixtureServiceTests.cpp
         tests/FacilityLayoutBuilderTests.cpp
         tests/WorldQueryTests.cpp

src/application/LayoutReviewWidget.cpp

@@ -126,6 +126,7 @@ bool isLiveValidationIssue(safecrowd::domain::ImportIssueCode code) {
     case ImportIssueCode::DisconnectedWalkableArea:
     case ImportIssueCode::WidthBelowMinimum:
     case ImportIssueCode::ConnectionSpanMisaligned:
+    case ImportIssueCode::ObstructedConnection:
         return true;
     default:
         return false;

src/application/ProjectPersistence.cpp

@@ -310,6 +310,7 @@ bool isLiveValidationIssue(safecrowd::domain::ImportIssueCode code) {
     case ImportIssueCode::WidthBelowMinimum:
     case ImportIssueCode::ConnectionSpanMisaligned:
     case ImportIssueCode::InvalidFloorReference:
+    case ImportIssueCode::ObstructedConnection:
         return true;
     default:
         return false;

src/domain/ImportIssue.cpp

@@ -49,6 +49,8 @@ const char* toString(ImportIssueCode code) noexcept {
         return "InvalidFloorReference";
     case ImportIssueCode::ConnectionSpanMisaligned:
         return "ConnectionSpanMisaligned";
+    case ImportIssueCode::ObstructedConnection:
+        return "ObstructedConnection";
     }
 
     return "Unknown";

src/domain/ImportIssue.h

@@ -26,6 +26,7 @@ enum class ImportIssueCode {
     UnmappedElement,
     InvalidFloorReference,
     ConnectionSpanMisaligned,
+    ObstructedConnection,
 };
 
 struct ImportIssue {

src/domain/ImportValidationService.cpp

@@ -256,6 +256,83 @@ bool hasRouteToExit(
     return false;
 }
 
+bool isPassageConnection(const Connection2D& connection) {
+    return connection.kind == ConnectionKind::Doorway
+        || connection.kind == ConnectionKind::Opening
+        || connection.kind == ConnectionKind::Exit;
+}
+
+bool barrierSharesConnectionFloor(const Barrier2D& barrier, const Connection2D& connection) {
+    return barrier.floorId.empty() || connection.floorId.empty() || barrier.floorId == connection.floorId;
+}
+
+// A blocking barrier obstructs a passage when one of its segments crosses the
+// connection span through the span interior. Crossings at the span endpoints
+// (where doorways legitimately meet flanking walls) and collinear/parallel
+// barriers that run along a zone boundary are intentionally ignored.
+bool barrierSegmentCrossesSpanInterior(const LineSegment2D& barrierSegment, const LineSegment2D& span) {
+    const auto spanDirection = subtract(span.end, span.start);
+    const auto barrierDirection = subtract(barrierSegment.end, barrierSegment.start);
+    const auto denominator = cross(spanDirection, barrierDirection);
+    if (std::abs(denominator) <= kGeometryEpsilon) {
+        return false;
+    }
+
+    const auto delta = subtract(barrierSegment.start, span.start);
+    const auto spanFraction = cross(delta, barrierDirection) / denominator;
+    const auto barrierFraction = cross(delta, spanDirection) / denominator;
+    constexpr double kSpanInteriorMargin = 0.15;
+    return spanFraction > kSpanInteriorMargin
+        && spanFraction < 1.0 - kSpanInteriorMargin
+        && barrierFraction >= -kGeometryEpsilon
+        && barrierFraction <= 1.0 + kGeometryEpsilon;
+}
+
+Point2D pointAlongSpan(const LineSegment2D& span, double fraction) {
+    return {
+        .x = span.start.x + ((span.end.x - span.start.x) * fraction),
+        .y = span.start.y + ((span.end.y - span.start.y) * fraction),
+    };
+}
+
+bool closedBarrierContainsSpanInterior(const Barrier2D& barrier, const LineSegment2D& span) {
+    if (!barrier.geometry.closed || barrier.geometry.vertices.size() < 3) {
+        return false;
+    }
+
+    const Polygon2D barrierFootprint{.outline = barrier.geometry.vertices};
+    constexpr double kInteriorSampleFractions[] = {0.25, 0.5, 0.75};
+    for (const auto fraction : kInteriorSampleFractions) {
+        if (pointInPolygon(barrierFootprint, pointAlongSpan(span, fraction))) {
+            return true;
+        }
+    }
+    return false;
+}
+
+bool barrierObstructsConnection(const Barrier2D& barrier, const Connection2D& connection) {
+    if (!barrier.blocksMovement || barrier.geometry.vertices.size() < 2) {
+        return false;
+    }
+
+    if (closedBarrierContainsSpanInterior(barrier, connection.centerSpan)) {
+        return true;
+    }
+
+    const auto& vertices = barrier.geometry.vertices;
+    const std::size_t segmentCount = barrier.geometry.closed ? vertices.size() : vertices.size() - 1;
+    for (std::size_t index = 0; index < segmentCount; ++index) {
+        const LineSegment2D segment{
+            .start = vertices[index],
+            .end = vertices[(index + 1) % vertices.size()],
+        };
+        if (barrierSegmentCrossesSpanInterior(segment, connection.centerSpan)) {
+            return true;
+        }
+    }
+    return false;
+}
+
 }  // namespace
 
 std::vector<ImportIssue> ImportValidationService::validate(const FacilityLayout2D& layout) const {
@@ -384,6 +461,26 @@ std::vector<ImportIssue> ImportValidationService::validate(const FacilityLayout2
         }
     }
 
+    for (const auto& connection : layout.connections) {
+        if (!isPassageConnection(connection)) {
+            continue;
+        }
+        for (const auto& barrier : layout.barriers) {
+            if (!barrierSharesConnectionFloor(barrier, connection)
+                || !barrierObstructsConnection(barrier, connection)) {
+                continue;
+            }
+            issues.push_back({
+                .severity = ImportIssueSeverity::Warning,
+                .code = ImportIssueCode::ObstructedConnection,
+                .message = "A wall or obstacle crosses a connection passage and may block movement through it.",
+                .sourceId = barrier.id,
+                .targetId = connection.id,
+            });
+            break;
+        }
+    }
+
     for (const auto& zone : layout.zones) {
         if (zone.kind == ZoneKind::Exit) {
             continue;

tests/ImportValidationServiceTests.cpp

@@ -0,0 +1,125 @@
+#include <algorithm>
+#include <vector>
+
+#include "TestSupport.h"
+
+#include "domain/FacilityLayout2D.h"
+#include "domain/ImportIssue.h"
+#include "domain/ImportValidationService.h"
+
+namespace {
+
+using namespace safecrowd::domain;
+
+// Builds a minimal but fully valid single-floor layout: one room reaching one
+// exit through an aligned exit connection. validate() returns no issues for it,
+// so any issue observed in a test is attributable to what that test adds.
+FacilityLayout2D makeConnectedRoomAndExit() {
+    FacilityLayout2D layout;
+    layout.id = "layout";
+    layout.floors.push_back({.id = "F1"});
+    layout.zones.push_back({
+        .id = "room",
+        .floorId = "F1",
+        .kind = ZoneKind::Room,
+        .area = {.outline = {{0.0, 0.0}, {10.0, 0.0}, {10.0, 8.0}, {0.0, 8.0}}},
+    });
+    layout.zones.push_back({
+        .id = "exit",
+        .floorId = "F1",
+        .kind = ZoneKind::Exit,
+        .area = {.outline = {{10.0, 3.0}, {12.0, 3.0}, {12.0, 5.0}, {10.0, 5.0}}},
+    });
+    layout.connections.push_back({
+        .id = "c1",
+        .floorId = "F1",
+        .kind = ConnectionKind::Exit,
+        .fromZoneId = "room",
+        .toZoneId = "exit",
+        .centerSpan = {.start = {10.0, 4.0}, .end = {11.0, 4.0}},
+    });
+    return layout;
+}
+
+bool hasIssueCode(const std::vector<ImportIssue>& issues, ImportIssueCode code) {
+    return std::any_of(issues.begin(), issues.end(), [&](const auto& issue) {
+        return issue.code == code;
+    });
+}
+
+}  // namespace
+
+SC_TEST(ImportValidationProducesNoIssuesForCleanLayout) {
+    const auto layout = makeConnectedRoomAndExit();
+
+    ImportValidationService validator;
+    const auto issues = validator.validate(layout);
+
+    SC_EXPECT_TRUE(issues.empty());
+}
+
+SC_TEST(ImportValidationFlagsBarrierCrossingConnectionPassage) {
+    auto layout = makeConnectedRoomAndExit();
+    // Wall through the middle of the exit passage span (crosses at 50%).
+    layout.barriers.push_back({
+        .id = "wall",
+        .floorId = "F1",
+        .geometry = {.vertices = {{10.5, 3.0}, {10.5, 5.0}}, .closed = false},
+        .blocksMovement = true,
+    });
+
+    ImportValidationService validator;
+    const auto issues = validator.validate(layout);
+
+    SC_EXPECT_TRUE(hasIssueCode(issues, ImportIssueCode::ObstructedConnection));
+    // The obstruction is reported for review but must not block simulation.
+    SC_EXPECT_TRUE(!hasBlockingImportIssue(issues));
+}
+
+SC_TEST(ImportValidationFlagsClosedObstacleContainingConnectionPassage) {
+    auto layout = makeConnectedRoomAndExit();
+    // Closed footprint fully contains the passage span, so no obstacle edge
+    // crosses the span even though movement through the passage is blocked.
+    layout.barriers.push_back({
+        .id = "obstacle",
+        .floorId = "F1",
+        .geometry = {.vertices = {{9.5, 3.5}, {11.5, 3.5}, {11.5, 4.5}, {9.5, 4.5}}, .closed = true},
+        .blocksMovement = true,
+    });
+
+    ImportValidationService validator;
+    const auto issues = validator.validate(layout);
+
+    SC_EXPECT_TRUE(hasIssueCode(issues, ImportIssueCode::ObstructedConnection));
+}
+
+SC_TEST(ImportValidationIgnoresNonBlockingBarrierOverConnection) {
+    auto layout = makeConnectedRoomAndExit();
+    layout.barriers.push_back({
+        .id = "marking",
+        .floorId = "F1",
+        .geometry = {.vertices = {{10.5, 3.0}, {10.5, 5.0}}, .closed = false},
+        .blocksMovement = false,
+    });
+
+    ImportValidationService validator;
+    const auto issues = validator.validate(layout);
+
+    SC_EXPECT_TRUE(!hasIssueCode(issues, ImportIssueCode::ObstructedConnection));
+}
+
+SC_TEST(ImportValidationDoesNotFlagWallMeetingConnectionAtEndpoint) {
+    auto layout = makeConnectedRoomAndExit();
+    // Boundary wall flanking the doorway: touches the span start endpoint only.
+    layout.barriers.push_back({
+        .id = "flank",
+        .floorId = "F1",
+        .geometry = {.vertices = {{10.0, 3.0}, {10.0, 5.0}}, .closed = false},
+        .blocksMovement = true,
+    });
+
+    ImportValidationService validator;
+    const auto issues = validator.validate(layout);
+
+    SC_EXPECT_TRUE(!hasIssueCode(issues, ImportIssueCode::ObstructedConnection));
+}