feat(server): initialize an empty tests folder

Closes: #34

src/main/java/ru/ewc/checklogic/FullServerContext.java

@@ -25,6 +25,7 @@
 package ru.ewc.checklogic;
 
 import java.net.URI;
+import java.nio.file.Paths;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
@@ -74,7 +75,6 @@ public final class FullServerContext {
      */
     private final StateFactory states;
 
-    // @todo #34 Reduce the number of ServerContext methods
     FullServerContext(final StateFactory initial, final URI tables, final URI commands) {
         this.states = initial;
         this.root = this.states.getRoot();
@@ -169,4 +169,13 @@ public void initialize() {
         this.state = this.states.initialState();
         this.context = new ComputationContext(this.state, this.tables, this.commands);
     }
+
+    public boolean hasTestsFolder() {
+        return Paths.get(this.root, "states").toFile().exists();
+    }
+
+    public void createTestFolder() {
+        Paths.get(this.root, "states").toFile().mkdirs();
+        this.context = new ComputationContext(this.state, this.tables, this.commands);
+    }
 }

src/main/java/ru/ewc/checklogic/server/AllEndpoints.java

@@ -57,6 +57,7 @@ public void register(final WebFramework web) {
         web.registerPath(GET, "test", this::httpGetRouter);
         web.registerPath(GET, "state", this::httpGetRouter);
         web.registerPath(POST, "state", this::httpPostRouter);
+        web.registerPath(POST, "test", this::httpPostRouter);
     }
 
     private Response httpPostRouter(final Request request) {
@@ -69,6 +70,9 @@ private Response httpPostRouter(final Request request) {
             } else {
                 result = this.pages.uninitializedPage();
             }
+        } else if (!this.context.hasTestsFolder() && "test".equals(address)) {
+            this.context.createTestFolder();
+            result = Response.htmlOk("OK", Map.of("HX-Redirect", "/test"));
         } else {
             result = new Response(NOT_FOUND, "", PLAIN_TEXT);
         }
@@ -84,7 +88,11 @@ private Response httpGetRouter(final Request request) {
             if (address.isEmpty()) {
                 result = this.pages.indexPage();
             } else if ("test".equals(address)) {
-                result = this.pages.testPage();
+                if (!this.context.hasTestsFolder()) {
+                    result = this.pages.noTestsFolder();
+                } else {
+                    result = this.pages.testPage();
+                }
             } else if ("state".equals(address)) {
                 result = this.pages.statePage(this.context);
             } else {

src/main/java/ru/ewc/checklogic/server/WebPages.java

@@ -65,6 +65,10 @@ public Response uninitializedPage() {
         return Response.htmlOk(this.templateNamed("templates/uninitialized.html", Map.of()));
     }
 
+    public Response noTestsFolder() {
+        return Response.htmlOk(this.templateNamed("templates/noTestsFolder.html", Map.of()));
+    }
+
     public Response testPage() {
         final String results = FileUtils.readFileNames(this.root)
             .map(this::performTest)
@@ -117,4 +121,5 @@ private TestResult performTest(final TestData test) {
         }
         return result;
     }
+
 }

src/main/resources/templates/noTestsFolder.html

@@ -0,0 +1,44 @@
+<!--
+  ~ MIT License
+  ~
+  ~ Copyright (c) 2024 Decision-Driven Development
+  ~
+  ~ Permission is hereby granted, free of charge, to any person obtaining a copy
+  ~ of this software and associated documentation files (the "Software"), to deal
+  ~ in the Software without restriction, including without limitation the rights
+  ~ to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+  ~ copies of the Software, and to permit persons to whom the Software is
+  ~ furnished to do so, subject to the following conditions:
+  ~
+  ~ The above copyright notice and this permission notice shall be included in all
+  ~ copies or substantial portions of the Software.
+  ~
+  ~ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+  ~ IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+  ~ FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+  ~ AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+  ~ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+  ~ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+  ~ SOFTWARE.
+  -->
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <title>LC Configuration</title>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1">
+    <script src="https://unpkg.com/htmx.org@1.9.12"
+            integrity="sha384-ujb1lZYygJmzgSwoxRggbCHcjc0rB2XoQrxeTUQyRjrOnlCoYta87iKBWq3EsdM2"
+            crossorigin="anonymous"></script>
+    <script src="https://unpkg.com/hyperscript.org@0.9.12"></script>
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/css/bootstrap.min.css"
+          rel="stylesheet"
+          integrity="sha384-QWTKZyjpPEjISv5WaRU9OFeRpok6YctnYmDr5pNlyT2bRjXh0JMhjY6hW+ALEwIH"
+          crossorigin="anonymous">
+    <link rel="stylesheet" href="static/main.css">
+</head>
+<body class="container">
+<h1>There is no folder with test files</h1>
+<button class="btn btn-primary" hx-trigger="click" hx-post="/test" hx-swap="delete">Create folder for tests</button>
+</body>
+</html>