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internal/database/queries/geospatial.sql

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+-- Фаза 2B: Геопространственные запросы (ВЫСОКИЙ ПРИОРИТЕТ)
+-- PostGIS запросы для поиска заявок по геолокации
+
+-- ============================================================================
+-- Поиск заявок рядом с точкой
+-- ============================================================================
+
+-- name: FindRequestsNearby :many
+SELECT
+    r.id,
+    r.title,
+    r.description,
+    r.address,
+    r.city,
+    r.urgency,
+    r.status,
+    r.created_at,
+    r.desired_completion_date,
+    ST_Y(r.location::geometry) as latitude,
+    ST_X(r.location::geometry) as longitude,
+    ST_Distance(
+        r.location,
+        ST_SetSRID(ST_MakePoint($1, $2), 4326)::geography
+    ) as distance_meters,
+    rt.name as request_type_name,
+    rt.icon as request_type_icon,
+    (u.first_name || ' ' || u.last_name) as requester_name
+FROM requests r
+JOIN request_types rt ON rt.id = r.request_type_id
+JOIN users u ON u.id = r.requester_id
+WHERE r.deleted_at IS NULL
+    AND r.status::text = ANY($3::text[])
+    AND ST_DWithin(
+        r.location,
+        ST_SetSRID(ST_MakePoint($1, $2), 4326)::geography,
+        $4
+    )
+ORDER BY distance_meters
+LIMIT $5 OFFSET $6;
+
+-- ============================================================================
+-- Поиск заявок в прямоугольной области (для карты)
+-- ============================================================================
+
+-- name: FindRequestsInBounds :many
+SELECT
+    r.id,
+    r.title,
+    r.urgency,
+    r.status,
+    r.created_at,
+    ST_Y(r.location::geometry) as latitude,
+    ST_X(r.location::geometry) as longitude,
+    rt.icon as request_type_icon,
+    rt.name as request_type_name
+FROM requests r
+JOIN request_types rt ON rt.id = r.request_type_id
+WHERE r.deleted_at IS NULL
+    AND r.status::text = ANY($1::text[])
+    AND ST_Within(
+        r.location::geometry,
+        ST_MakeEnvelope($2, $3, $4, $5, 4326)
+    )
+ORDER BY r.created_at DESC
+LIMIT 200;
+
+-- ============================================================================
+-- Подсчет заявок поблизости
+-- ============================================================================
+
+-- name: CountRequestsNearby :one
+SELECT COUNT(*) FROM requests r
+WHERE r.deleted_at IS NULL
+    AND r.status = $3
+    AND ST_DWithin(
+        r.location,
+        ST_SetSRID(ST_MakePoint($1, $2), 4326)::geography,
+        $4
+    );
+
+-- ============================================================================
+-- Поиск волонтеров рядом с заявкой
+-- ============================================================================
+
+-- name: FindVolunteersNearRequest :many
+SELECT
+    u.id,
+    (u.first_name || ' ' || u.last_name) as full_name,
+    u.avatar_url,
+    u.volunteer_rating,
+    u.completed_requests_count,
+    ST_Y(u.location::geometry) as latitude,
+    ST_X(u.location::geometry) as longitude,
+    ST_Distance(
+        u.location,
+        (SELECT req.location FROM requests req WHERE req.id = $1)
+    ) as distance_meters
+FROM users u
+JOIN user_roles ur ON ur.user_id = u.id
+JOIN roles r ON r.id = ur.role_id
+WHERE r.name = 'volunteer'
+    AND u.deleted_at IS NULL
+    AND u.is_blocked = FALSE
+    AND u.location IS NOT NULL
+    AND ST_DWithin(
+        u.location,
+        (SELECT req.location FROM requests req WHERE req.id = $1),
+        $2
+    )
+ORDER BY distance_meters
+LIMIT $3;
+
+-- ============================================================================
+-- Поиск ближайших заявок для волонтера
+-- ============================================================================
+
+-- name: FindNearestRequestsForVolunteer :many
+SELECT
+    r.id,
+    r.title,
+    r.description,
+    r.urgency,
+    r.status,
+    r.created_at,
+    ST_Y(r.location::geometry) as latitude,
+    ST_X(r.location::geometry) as longitude,
+    ST_Distance(
+        r.location,
+        (SELECT u.location FROM users u WHERE u.id = $1)
+    ) as distance_meters,
+    rt.name as request_type_name,
+    rt.icon as request_type_icon
+FROM requests r
+JOIN request_types rt ON rt.id = r.request_type_id
+WHERE r.deleted_at IS NULL
+    AND r.status = 'approved'
+    AND r.assigned_volunteer_id IS NULL
+    AND ST_DWithin(
+        r.location,
+        (SELECT u.location FROM users u WHERE u.id = $1),
+        $2
+    )
+ORDER BY
+    CASE r.urgency
+        WHEN 'urgent' THEN 1
+        WHEN 'high' THEN 2
+        WHEN 'medium' THEN 3
+        ELSE 4
+    END,
+    distance_meters
+LIMIT $3;