Query and display phenomena

src/main/scala/db/Main.scala

@@ -45,22 +45,22 @@ object Main {
 //    } yield re
 
     val formatter = DateTimeFormatter.ofPattern("yyyyMMdd_HHmm")
-    val from = LocalDateTime.parse("20240110_1000", formatter)
-    val to = LocalDateTime.parse("20240111_1000", formatter)
-//    val cities = NonEmptyList.of("Ainaži", "Rīga", "Kolka", "Vičaki")
+    val from = LocalDateTime.parse("20240207_1000", formatter)
+    val to = LocalDateTime.parse("20240208_1400", formatter)
+    val cities = NonEmptyList.of("Ainaži", "Rīga", "Kolka", "Vičaki")
 //    val cities = NonEmptyList.of("Rīga")
 
-//    val query = UserQuery(cities, "tempMax", AggregateKey.List, ChronoUnit.DAYS, from, to)
+    val query = UserQuery(cities, "phenomena", AggregateKey.List, ChronoUnit.DAYS, from, to)
 
     val re = for {
             postgresService <- PostgresService.of(xa)
-            re <- postgresService.queryCityAllFields("Rīga", from, to)
+            re <- postgresService.query(query)
           } yield re
 
 //    val jssson = re.map(result => ResponseWrapper(result, query))
 //        .map(responseWrapper => responseWrapper.asJson.pretty)
 
-    println(re.unsafeRunSync())
+    println(re.unsafeRunSync().asJson.pretty)
 
 
 //    println(jssson.unsafeRunSync())

src/main/scala/db/PostgresService.scala

@@ -11,8 +11,12 @@ import java.time.{LocalDate, LocalDateTime, OffsetDateTime}
 import doobie.postgres.implicits._
 import org.typelevel.log4cats.Logger
 import org.typelevel.log4cats.slf4j.Slf4jLogger
-import parse.Aggregate.{AggregateKey, AggregateValue, DoubleValue, TimeDoubleList, UserQuery}
+import parse.Aggregate.{AggregateKey, AggregateValue, DistinctStringList, DoubleValue, TimeDoubleList, UserQuery}
 import parse.{Parser, WeatherStationData}
+import shapeless.syntax.std.tuple.productTupleOps
+
+import io.circe._
+import io.circe.parser._
 
 import java.time.temporal.ChronoUnit
 import scala.util.matching.Regex
@@ -101,9 +105,31 @@ class PostgresService(transactor: Transactor[IO], log: Logger[IO]) {
   }
 
   def query(userQuery: UserQuery):  IO[Map[String, Option[AggregateValue]]] = {
-    if (userQuery.field == "phenomena") { // this handles strings
-      // TODO query list and distinct values from phenomena
-      IO(Map()) // empty result
+    if (userQuery.field == "phenomena") {
+      val query =
+        fr"""
+        SELECT city, array_to_json(array_agg(phenomena)) AS aggregated_phenomena
+        FROM weather
+        WHERE """ ++ Fragments.in(fr"city", userQuery.cities) ++
+          fr" AND dateTime BETWEEN ${userQuery.from} AND ${userQuery.to}" ++
+          fr" GROUP BY city, phenomena"
+
+      query.query[(String, Option[String])]
+        .to[List]
+        .transact(transactor)
+        .map { resultList =>
+          resultList
+            .flatMap {
+              case (city, jsonOption) =>
+                jsonOption.flatMap { jsonString =>
+                  parse(jsonString).toOption.flatMap(_.as[List[List[String]]].toOption.map(_.flatten.distinct))
+                }.map(phenomena => (city, phenomena.filter(_.nonEmpty)))
+            }
+            .groupBy(_._1)
+            .view.mapValues(_.flatMap(_._2).distinct).toMap
+            .map { case (city, phenomenaList) => city -> Option(DistinctStringList(phenomenaList)) }
+        }
+
     } else if (List(
       AggregateKey.Max,
       AggregateKey.Min,

src/main/scala/parse/Aggregate.scala

@@ -93,7 +93,9 @@ object Aggregate {
     implicit val stringListListEncoder: Encoder[StringListList] = Encoder.instance { sllValue =>
       Json.arr(sllValue.list.map(_.asJson): _*)
     }
-    implicit val distinctStringListEncoder: Encoder[DistinctStringList] = deriveEncoder[DistinctStringList]
+    implicit val distinctStringListEncoder: Encoder[DistinctStringList] = Encoder.instance { dslistValue =>
+      Json.arr(dslistValue.list.map(_.asJson): _*)
+    }
   }
 
   private def convertDateTime(granularity: ChronoUnit)(data: (LocalDateTime, _)): String = {

web/src/cities/result/GridResult.tsx

@@ -1,4 +1,4 @@
-import { Component } from "solid-js";
+import { Component, Match, Switch } from "solid-js";
 
 import { CityChart } from "../../components/chart/CityChart";
 import { DataQuery } from "../helpers";
@@ -7,11 +7,14 @@ export const GridResult: Component<{ city: string, query: DataQuery, result: any
     return (
         <div class="item">
             <h4>{ city }</h4>
-            {
-                isDateNumber(result)
-                    ? <CityChart city={()=>city} data={()=>result} query={()=>query}/>
-                    : <p>{ result }</p>
-            }
+            <Switch fallback={<p>{ result }</p>}>
+                <Match when={query.field === "phenomena"}>
+                    { result.join(", ") }
+                </Match>
+                <Match when={isDateNumber(result)}>
+                    <CityChart city={()=>city} data={()=>result} query={()=>query}/>
+                </Match>
+            </Switch>
         </div>
     );
 }