Added /v1/errors for reading error files

Plan/common/src/main/java/com/djrapitops/plan/delivery/webserver/resolver/json/ErrorsJSONResolver.java

@@ -0,0 +1,86 @@
+package com.djrapitops.plan.delivery.webserver.resolver.json;
+
+import com.djrapitops.plan.delivery.web.resolver.MimeType;
+import com.djrapitops.plan.delivery.web.resolver.Resolver;
+import com.djrapitops.plan.delivery.web.resolver.Response;
+import com.djrapitops.plan.delivery.web.resolver.request.Request;
+import com.djrapitops.plan.delivery.web.resolver.request.WebUser;
+import com.djrapitops.plan.storage.file.PlanFiles;
+
+import javax.inject.Inject;
+import javax.inject.Singleton;
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.Optional;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+
+@Singleton
+public class ErrorsJSONResolver implements Resolver {
+
+    private final PlanFiles files;
+
+    @Inject
+    public ErrorsJSONResolver(PlanFiles files) {
+        this.files = files;
+    }
+
+    @Override
+    public boolean canAccess(Request request) {
+        return request.getUser().orElse(new WebUser("")).hasPermission("page.server");
+    }
+
+    @Override
+    public Optional<Response> resolve(Request request) {
+        return Optional.of(getResponse());
+    }
+
+    private Response getResponse() {
+        return Response.builder()
+                .setMimeType(MimeType.JSON)
+                .setJSONContent(loadErrorLogs())
+                .build();
+    }
+
+    private List<ErrorFile> loadErrorLogs() {
+        File[] files = this.files.getLogsFolder().listFiles();
+        if (files == null || files.length == 0) return Collections.emptyList();
+
+        List<ErrorFile> errorFiles = new ArrayList<>();
+        for (File file : files) {
+            errorFiles.add(new ErrorFile(file.getName(), read(file)));
+        }
+
+        return errorFiles;
+    }
+
+    private List<String> read(File file) {
+        try (Stream<String> lines = Files.lines(file.toPath())) {
+            return lines.collect(Collectors.toList());
+        } catch (IOException e) {
+            return Collections.singletonList("Failed to read " + file.getAbsolutePath() + ": " + e.toString());
+        }
+    }
+
+    private static class ErrorFile {
+        private final String fileName;
+        private final List<String> contents;
+
+        public ErrorFile(String fileName, List<String> contents) {
+            this.fileName = fileName;
+            this.contents = contents;
+        }
+
+        public String getFileName() {
+            return fileName;
+        }
+
+        public List<String> getContents() {
+            return contents;
+        }
+    }
+}

Plan/common/src/main/java/com/djrapitops/plan/delivery/webserver/resolver/json/RootJSONResolver.java

@@ -53,6 +53,7 @@ public class RootJSONResolver {
             PvPPvEJSONCreator pvPPvEJSONCreator,
             PlayerBaseOverviewJSONCreator playerBaseOverviewJSONCreator,
             PerformanceJSONCreator performanceJSONCreator,
+            ErrorsJSONResolver errorsJSONResolver,
 
             PlayerJSONResolver playerJSONResolver,
             NetworkJSONResolver networkJSONResolver,
@@ -78,6 +79,7 @@ public class RootJSONResolver {
                 .add("network", networkJSONResolver.getResolver())
                 .add("filters", filtersJSONResolver)
                 .add("query", queryJSONResolver)
+                .add("errors", errorsJSONResolver)
                 .build();
     }