From fbcd9e913f8ac11f3a4cd503008e7d7d11fc754d Mon Sep 17 00:00:00 2001
From: Johannes Theiner <j.theiner@live.de>
Date: Fri, 3 May 2019 08:44:52 +0200
Subject: [PATCH] + Anfang Dateien Verwaltung

Signed-off-by: Johannes Theiner <j.theiner@live.de>
#SPM-7 add work development 1h
---
 pom.xml                                       | 13 +++++
 .../java/de/hsel/spm/baudas/web/Data.java     | 39 +++++++++++++++
 .../java/de/hsel/spm/baudas/web/Files.java    | 29 +++++++++++
 .../java/de/hsel/spm/baudas/web/Upload.java   | 49 +++++++++++++++++++
 src/main/webapp/version.jsp                   |  7 +++
 5 files changed, 137 insertions(+)
 create mode 100644 src/main/java/de/hsel/spm/baudas/web/Data.java
 create mode 100644 src/main/java/de/hsel/spm/baudas/web/Files.java
 create mode 100644 src/main/java/de/hsel/spm/baudas/web/Upload.java
 create mode 100644 src/main/webapp/version.jsp

diff --git a/pom.xml b/pom.xml
index 1c9e45e..b7c613d 100644
--- a/pom.xml
+++ b/pom.xml
@@ -80,6 +80,13 @@
                     <server>TomcatServer</server>
                     <path>/bauDas</path>
                 </configuration>
+                <dependencies>
+                    <dependency>
+                        <groupId>javax.servlet</groupId>
+                        <artifactId>javax.servlet-api</artifactId>
+                        <version>4.0.1</version>
+                    </dependency>
+                </dependencies>
             </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
@@ -258,6 +265,12 @@
             <version>3.8.3</version>
         </dependency>
 
+        <dependency>
+            <groupId>com.google.code.gson</groupId>
+            <artifactId>gson</artifactId>
+            <version>2.8.2</version>
+        </dependency>
+
 
         <!--Annotations-->
         <dependency>
diff --git a/src/main/java/de/hsel/spm/baudas/web/Data.java b/src/main/java/de/hsel/spm/baudas/web/Data.java
new file mode 100644
index 0000000..ed3581e
--- /dev/null
+++ b/src/main/java/de/hsel/spm/baudas/web/Data.java
@@ -0,0 +1,39 @@
+package de.hsel.spm.baudas.web;
+
+import lombok.Getter;
+
+import java.io.File;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.UUID;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ConcurrentMap;
+
+/**
+ * @author Johannes Theiner
+ * @version 0.1
+ * @since 0.1
+ **/
+public class Data {
+
+    @Getter
+    private static ConcurrentMap<UUID, String> files = new ConcurrentHashMap<>();
+
+
+    public static Path add(String name) {
+        Path path;
+        if(files.size() >= 5) {
+            path = null;
+            files.put(UUID.randomUUID(), name);
+        }else {
+            UUID uuid = UUID.randomUUID();
+            files.put(uuid, name);
+            path = Paths.get("target/" + uuid + ".csv");
+        }
+        return path;
+    }
+
+    public static File get(int index) {
+        return new File("target/" + index + ".csv");
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/de/hsel/spm/baudas/web/Files.java b/src/main/java/de/hsel/spm/baudas/web/Files.java
new file mode 100644
index 0000000..56ff232
--- /dev/null
+++ b/src/main/java/de/hsel/spm/baudas/web/Files.java
@@ -0,0 +1,29 @@
+package de.hsel.spm.baudas.web;
+
+import com.google.gson.Gson;
+import org.jetbrains.annotations.NotNull;
+
+import javax.servlet.annotation.WebServlet;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+import java.io.PrintWriter;
+
+/**
+ * @author Johannes Theiner
+ * @version 0.1
+ * @since 0.1
+ **/
+
+@WebServlet("/files")
+public class Files extends HttpServlet {
+
+    @Override
+    protected void doGet(@NotNull HttpServletRequest req, @NotNull HttpServletResponse resp) throws IOException {
+        resp.setContentType("application/json");
+        PrintWriter out = resp.getWriter();
+        Gson gson = new Gson();
+        out.println(gson.toJson(Data.getFiles()));
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/de/hsel/spm/baudas/web/Upload.java b/src/main/java/de/hsel/spm/baudas/web/Upload.java
new file mode 100644
index 0000000..5da00e2
--- /dev/null
+++ b/src/main/java/de/hsel/spm/baudas/web/Upload.java
@@ -0,0 +1,49 @@
+package de.hsel.spm.baudas.web;
+
+import org.jetbrains.annotations.NotNull;
+
+import javax.servlet.ServletException;
+import javax.servlet.annotation.MultipartConfig;
+import javax.servlet.annotation.WebServlet;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import javax.servlet.http.Part;
+import java.io.IOException;
+import java.io.InputStream;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.nio.file.StandardCopyOption;
+
+/**
+ * @author Johannes Theiner
+ * @version 0.1
+ * @since 0.1
+ **/
+
+@WebServlet("/upload")
+@MultipartConfig
+public class Upload extends HttpServlet {
+
+    @Override
+    protected void doPost(@NotNull HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
+        req.setCharacterEncoding(StandardCharsets.UTF_8.name());
+
+        Part filePart = req.getPart("file");
+        String fileName = Paths.get(filePart.getSubmittedFileName()).getFileName().toString();
+        InputStream inputStream = filePart.getInputStream();
+
+
+        Path path = Data.add(fileName);
+        System.out.println(path);
+        if(!Files.exists(path)) {
+            Files.createFile(path);
+        }
+
+        Files.copy(inputStream, path, StandardCopyOption.REPLACE_EXISTING);
+
+        resp.sendRedirect("files");
+    }
+}
\ No newline at end of file
diff --git a/src/main/webapp/version.jsp b/src/main/webapp/version.jsp
new file mode 100644
index 0000000..d47f7ea
--- /dev/null
+++ b/src/main/webapp/version.jsp
@@ -0,0 +1,7 @@
+<%@ page import="weka.core.Version" %>
+Server info: <%= application.getServerInfo() %><br>
+Servlet version: <%= application.getMajorVersion() %>.<%= application.getMinorVersion() %><br>
+JSP version: <%= JspFactory.getDefaultFactory().getEngineInfo().getSpecificationVersion() %><br>
+Java version: <%= System.getProperty("java.version") %><br>
+
+Weka version: <%= Version.VERSION %>
\ No newline at end of file