Add delay and spinner for station map, common const and component for delay

web/src/cities/result/QueryResult.tsx

@@ -2,9 +2,10 @@ import moment from "moment";
 import { Accessor, Component, createResource, createSignal } from "solid-js";
 
 import "../../css/Result.css"
-import { apiHost } from "../../consts";
+import { FETCH_DELAY_MS, apiHost } from "../../consts";
 import { isQueryResult } from "../helpers";
 import { Result } from "./Result";
+import { LoadingSpinner } from "../../components/LoadingSpinner";
 
 export const QueryResult: Component<{
     getCities: Accessor<Set<string>>,
@@ -21,7 +22,7 @@ export const QueryResult: Component<{
 
     const fetchQuery = async (timestamp: number) => {
         if (cities() === "") return new Error("ERROR: Select cities!");
-        await new Promise(resolve => setTimeout(resolve, 500))
+        await new Promise(resolve => setTimeout(resolve, FETCH_DELAY_MS))
         const response = await fetch(`${apiHost}/api/query/city/${cities()}/${queryStart()}-${queryEnd()}/${props.getGranularity()}/${props.getField()}/${props.getKey()}`);
         const json = await response.json();
         return json;
@@ -37,12 +38,7 @@ export const QueryResult: Component<{
                 value="Query Data"
                 onClick={() => setTimestamp(Date.now())}
             />
-            { queryResource.loading && (
-                <div>
-                    <span class="spinner"></span>
-                    <span style={{ "padding-left": "16px" }}>Loading query</span>
-                </div>
-            )}
+            { queryResource.loading && <LoadingSpinner text="Loading query" /> }
             { queryResource.error && (
                 <div>Error while querying: ${queryResource.error}</div>
             )}

web/src/components/LoadingSpinner.tsx

@@ -0,0 +1,10 @@
+import { Component } from "solid-js";
+
+export const LoadingSpinner: Component<{ text: string; }> = ({ text }) => {
+    return (
+        <div>
+            <span class="spinner"></span>
+            <span style={{ "padding-left": "16px" }}>{ text }</span>
+        </div>
+    );
+}

web/src/components/chart/CityChart.tsx

@@ -13,6 +13,8 @@ export const CityChart: Component<{
     const [getCanvas, setCanvas] = createSignal<HTMLCanvasElement>();
     const [getIsLarge, setIsLarge] = createSignal(false);
 
+    console.log("props.data()", props.data());
+
     let chart: Chart | undefined;
     const data: [string, number | null][] = props.data().map(([dateStr, value]) => [
         formatDateString(dateStr),

web/src/consts.ts

@@ -6,6 +6,8 @@ export const apiHost = import.meta.env.MODE === "development"
     ? import.meta.env.VITE_API_HOST : `${protocol}//${host}:${port}`;
 // export const apiHost = import.meta.env.VITE_API_HOST;
 
+export const FETCH_DELAY_MS = 500; // delays by 500ms for server requests, so user sees that something is loading
+
 export const cityList = ["Ainaži", "Alūksne", "Bauska", "Dagda", "Daugavgrīva", "Daugavpils", "Dobele", "Gulbene", "Jelgava", "Kalnciems", "Kolka", "Kuldīga", "Lielpēči", "Liepāja", "Madona", "Mērsrags", "Pāvilosta", "Piedruja", "Priekuļi", "Rēzekne", "Rīga", "Rucava", "Rūjiena", "Saldus", "Sigulda", "Sīļi", "Skrīveri", "Skulte", "Stende", "Ventspils", "Vičaki", "Zīlāni", "Zosēni"];
 
 export const weatherField = ["tempMax", "tempMin", "tempAvg", "precipitation", "windAvg", "windMax", "visibilityMin", "visibilityAvg", "snowAvg", "atmPressire", "dewPoint", "humidity", "sunDuration", "phenomena"];

web/src/country/result/QueryResult.tsx

@@ -1,8 +1,9 @@
 import moment from "moment";
 import { Accessor, Component, createResource, createSignal } from "solid-js";
 
-import { apiHost } from "../../consts";
+import { FETCH_DELAY_MS, apiHost } from "../../consts";
 import { Result } from "./Result";
+import { LoadingSpinner } from "../../components/LoadingSpinner";
 
 
 export const QueryResult: Component<{
@@ -16,7 +17,7 @@ export const QueryResult: Component<{
     
     const fetchQuery = async (timestamp: number) => {
         if (props.getFields().length === 0) return new Error("ERROR: Select weather parameters!");
-        await new Promise(resolve => setTimeout(resolve, 500))
+        await new Promise(resolve => setTimeout(resolve, FETCH_DELAY_MS))
         const response = await fetch(`${apiHost}/api/query/country/${queryStart()}-${queryEnd()}/${props.getFields().join(",")}`);
         const json = await response.json();
         return json;
@@ -32,12 +33,7 @@ export const QueryResult: Component<{
                 value="Query Data"
                 onClick={() => setTimestamp(Date.now())}
             />
-            { queryResource.loading && (
-                <div>
-                    <span class="spinner"></span>
-                    <span style={{ "padding-left": "16px" }}>Loading query</span>
-                </div>
-            )}
+            { queryResource.loading && <LoadingSpinner text="Loading query" /> }
             { queryResource.error && (
                 <div>Error while querying: ${queryResource.error}</div>
             )}

web/src/database/DateList.tsx

@@ -1,10 +1,11 @@
 import moment from "moment";
 import { Accessor, Component, createResource, createSignal, Setter } from "solid-js";
 
-import { apiHost } from "../consts";
+import { apiHost, FETCH_DELAY_MS } from "../consts";
 
 import "../css/spinner.css";
 import { Calendar } from "./Calendar";
+import { LoadingSpinner } from "../components/LoadingSpinner";
 
 export const DateList: Component<{getDate: Accessor<Date>, setDate: Setter<Date>;}> = (props) => {
     const [getCurrentMonth, setCurrentMonth] = createSignal(new Date());
@@ -14,7 +15,7 @@ export const DateList: Component<{getDate: Accessor<Date>, setDate: Setter<Date>
             moment(getCurrentMonth()).subtract(1, "months").format("yyyyMM"),
             moment(getCurrentMonth()).add(1, "months").format("yyyyMM"),
         ];
-        await new Promise(resolve => setTimeout(resolve, 500))
+        await new Promise(resolve => setTimeout(resolve, FETCH_DELAY_MS))
         const response = await fetch(`${apiHost}/api/show/months/${months.join(",")}`);
         const json = await response.json();
         return json;
@@ -24,12 +25,7 @@ export const DateList: Component<{getDate: Accessor<Date>, setDate: Setter<Date>
 
     return (
         <div>
-            { datesResource.loading && (
-                <div>
-                    <span class="spinner"></span>
-                    <span style={{ "padding-left": "16px" }}>Loading dates</span>
-                </div>
-            )}
+            { datesResource.loading && <LoadingSpinner text="Loading calendar..." /> }
             { datesResource.error && (
                 <div>Error while loading dates: ${datesResource.error}</div>
             )}

web/src/database/FileContent.tsx

@@ -1,11 +1,12 @@
 import { Accessor, Component, createResource, JSXElement } from "solid-js";
-import { apiHost } from "../consts";
+import { apiHost, FETCH_DELAY_MS } from "../consts";
 import { PrettifyCSV } from "./PrettifyCSV";
+import { LoadingSpinner } from "../components/LoadingSpinner";
 
 export const FileContent: Component<{getFileName: Accessor<string>}> = (props) => {
     const fetchFileContent = async (fileName: string) => {
         if (fileName === "") return;
-        await new Promise(resolve => setTimeout(resolve, 500))
+        await new Promise(resolve => setTimeout(resolve, FETCH_DELAY_MS))
         const response = await fetch(`${apiHost}/api/show/datetime/${fileName}`);
         const text = await response.json();
         return text;
@@ -16,12 +17,7 @@ export const FileContent: Component<{getFileName: Accessor<string>}> = (props) =
     
     return (
         <div>
-            { contentResource.loading && (
-                <div>
-                    <span class="spinner"></span>
-                    <span style={{ "padding-left": "16px" }}>load content</span>
-                </div>
-            )}
+            { contentResource.loading && <LoadingSpinner text="Loading date-time weather" /> }
             { contentResource.error && (
                 <div>Error while loading file content: ${contentResource.error}</div>
             )}

web/src/database/FileNameList.tsx

@@ -1,15 +1,16 @@
 import moment from "moment";
 import { Accessor, Component, createResource, Setter } from "solid-js";
-import { apiHost } from "../consts";
+import { apiHost, FETCH_DELAY_MS } from "../consts";
 
 import "../css/spinner.css";
+import { LoadingSpinner } from "../components/LoadingSpinner";
 
 export const FileNameList: Component<{
     getDate: Accessor<Date>,
     setFileName: Setter<string>,
 }> = (props) => {
     const fetchFileNames = async (fetchDate: Date) => {
-        await new Promise(resolve => setTimeout(resolve, 500))
+        await new Promise(resolve => setTimeout(resolve, FETCH_DELAY_MS))
         const response = await fetch(`${apiHost}/api/show/date/${moment(fetchDate).format("YYYYMMDD")}`);
         const json = await response.json();
         return json;
@@ -23,12 +24,7 @@ export const FileNameList: Component<{
 
     return (
         <div>
-            { fileNameResource.loading && (
-                <div>
-                    <span class="spinner"></span>
-                    <span style={{ "padding-left": "16px" }}>loading {moment(props.getDate()).format("YYYYMMDD")}</span>
-                </div>
-            )}
+            { fileNameResource.loading && <LoadingSpinner text={"Loading date: "+moment(props.getDate()).format("YYYYMMDD")} /> }
             { fileNameResource.error && (
                 <div>Error while loading file names: ${fileNameResource.error}</div>
             )}

web/src/station/MapResult.tsx

@@ -4,7 +4,8 @@ import { coordToCity } from "./coordToCity";
 import { cityCoords } from "./cityCoords";
 import mapUrl from "../assets/map_1000x570.webp";
 import moment from "moment";
-import { apiHost } from "../consts";
+import { FETCH_DELAY_MS, apiHost } from "../consts";
+import { LoadingSpinner } from "../components/LoadingSpinner";
 
 export const MapResult: Component<{
     setCity: Setter<string | undefined>,
@@ -49,6 +50,8 @@ export const MapResult: Component<{
 
     const [meteoValues] = createResource(citiesFieldDate, async ([cities, field, start, end]: [Set<string>, string, Date, Date]) => {
         if (cities.size === 0) return;
+        await new Promise(resolve => setTimeout(resolve, FETCH_DELAY_MS));
+
         const queryStart = moment(start).format("YYYYMMDD_HHmm");
         const queryEnd = moment(end).format("YYYYMMDD_HHmm");
         let aggregate: string = "avg";
@@ -74,7 +77,17 @@ export const MapResult: Component<{
         );
     });
 
-    return <canvas ref={setCanvas} width={1000} height={570} />;
+    return (
+        <div>
+            { meteoValues.loading && <LoadingSpinner text="Drawing map..." /> }
+            <canvas
+                ref={setCanvas}
+                style={{ display: meteoValues.loading ? "none" : "block" }}
+                width={1000}
+                height={570}
+            />
+        </div>
+    );
 }
 
 function drawOnMap(

web/src/station/Result.tsx

@@ -1,5 +1,5 @@
 import { Accessor, Component, createResource } from "solid-js";
-import { apiHost } from "../consts";
+import { FETCH_DELAY_MS, apiHost } from "../consts";
 import moment from "moment";
 import { CityChart } from "../components/chart/CityChart";
 
@@ -14,7 +14,7 @@ export const Result: Component<{
 
     const fetchList = async ([city, field, getStart, getEnd]: [string | undefined, string, Date, Date]) => {
         if (city === undefined) return undefined;
-        await new Promise(resolve => setTimeout(resolve, 500));
+        await new Promise(resolve => setTimeout(resolve, FETCH_DELAY_MS));
         const response = await fetch(`${apiHost}/api/query/city/${city}/${queryStart()}-${queryEnd()}/hour/${field}/list`);
         const json = await response.json();
         return json;
@@ -22,7 +22,7 @@ export const Result: Component<{
 
     const fetchMeteo = async ([city, getStart, getEnd]: [string | undefined, Date, Date]) => {
         if (city === undefined) return undefined;
-        await new Promise(resolve => setTimeout(resolve, 500));
+        await new Promise(resolve => setTimeout(resolve, FETCH_DELAY_MS));
         const response = await fetch(`${apiHost}/api/query/city/${city}/${queryStart()}-${queryEnd()}/allFields`);
         const json = await response.json();
         return json;
@@ -63,10 +63,10 @@ export const Result: Component<{
             }
             { listResource() && props.getCity() && !listResource.loading &&
                 <div>
-                    <h3>{ props.getCity() }</h3>
+                    <h3>{ props.getCity() }: { props.getField() }</h3>
                     <CityChart
                         city={() => listResource().query.cities[0]}
-                        data={() => listResource().result[listResource().query.cities[0]]}
+                        data={() => listResource().result[listResource().query.cities[0]] ?? []}
                         query={() => listResource().query}
                     />
                 </div>