From 4f2589e620f467d117003a908a0fc1bf2f3c476a Mon Sep 17 00:00:00 2001
From: ulrich
Date: Mon, 12 Apr 2021 06:22:58 +0000
Subject: [PATCH] titelErmitteln

---
 src/de/uhilger/mediaz/api/StorageHandler.java |  194 ++++++++++++++++++++++--------------------------
 1 files changed, 88 insertions(+), 106 deletions(-)

diff --git a/src/de/uhilger/mediaz/api/StorageHandler.java b/src/de/uhilger/mediaz/api/StorageHandler.java
index 12c4417..d12e6c1 100644
--- a/src/de/uhilger/mediaz/api/StorageHandler.java
+++ b/src/de/uhilger/mediaz/api/StorageHandler.java
@@ -1,134 +1,116 @@
 /*
- * To change this license header, choose License Headers in Project Properties.
- * To change this template file, choose Tools | Templates
- * and open the template in the editor.
+  Mediazentrale - Personal Media Center
+  Copyright (C) 2021  Ulrich Hilger
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU Affero General Public License as
+  published by the Free Software Foundation, either version 3 of the
+  License, or (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU Affero General Public License for more details.
+
+  You should have received a copy of the GNU Affero General Public License
+  along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 package de.uhilger.mediaz.api;
 
 import com.google.gson.Gson;
 import com.sun.net.httpserver.HttpExchange;
-import com.sun.net.httpserver.HttpHandler;
 import de.uhilger.mediaz.App;
+import static de.uhilger.mediaz.App.RB_EP_LISTE;
 import de.uhilger.mediaz.Server;
 import de.uhilger.mediaz.store.FileStorage;
-import de.uhilger.mediaz.entity.Ablageort;
-import java.io.BufferedReader;
-import java.io.File;
+import de.uhilger.mediaz.entity.Entity;
 import java.io.IOException;
-import java.io.InputStream;
-import java.io.InputStreamReader;
-import java.io.OutputStream;
+import java.util.List;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 
 /**
- *
- * @author ulrich
+ * HttpHandler fuer die Verwaltung von Entitaeten der Mediazentrale
+ * 
+ * @author Ulrich Hilger
+ * @version 1, 5.4.2021
  */
-public class StorageHandler implements HttpHandler  {
+public class StorageHandler extends AbstractHandler {
   
   private static final Logger logger = Logger.getLogger(StorageHandler.class.getName());
 
-  
-  /*
-  
-    HTTP GET: lies einen Ablageort und schreibe JSON
-    HTTP PUT: schreibe einen neuen Ablageort auf die Platte
-    HTTP POST: schreibe Aenderungen auf die Platte
-    HTTP DELETE: loesche den Ablageort
-  
-    Beispiele:
-  
-    HTTP GET an /mz/api/store/Ablageort/Katalog
-    liest den Ablageort namens "Katalog"
-  
-    HTTP POST an /mz/api/store/Ablageort
-    schreibt den neuen Ablageort im Body der Anfrage (Neu)
-  
-    HTTP PUT an /mz/api/store/Ablageort
-    sucht den Ablageort mit dem Namen laut Body der Anfrage 
-    und schreibt den Inhalt aus der Anfrage in die Datei (Aenderung)
-  
-    HTTP DELETE an /mz/api/store/Ablageort/Katalog
-    löscht den Ablageort namens "Katalog"
-  
-  */
-  
-  public static final String HTTP_GET = "GET";
-  public static final String HTTP_PUT = "PUT";
-  public static final String HTTP_POST = "POST";
-  public static final String HTTP_DELETE = "DELETE";
-
   @Override
-  public void handle(HttpExchange e) throws IOException {
-    String method = e.getRequestMethod();
+  protected String put(HttpExchange e) throws IOException {
     String path = e.getRequestURI().toString();
-    String[] elems = path.split(App.getRs(Server.RB_SLASH));
-    String type = "";
-    String elemName = "";
-    FileStorage fs = new FileStorage(App.getInitParameter(App.getRs(App.RB_AP_CONF)));
-    switch(method) {
-      case HTTP_GET:
-        type = elems[elems.length - 2];
-        elemName = elems[elems.length - 1];
-        //this.readFromFile(file);
-        fs.read(type, elemName);
-        break;
-        
-      case HTTP_PUT:
-        type = elems[elems.length - 1];
-        elemName = "noch bauen: lesen aus Body";
-        break;
-        
-      case HTTP_POST:
-        type = elems[elems.length - 1];
-        elemName = bodyLesen(e);
-        if(type.equalsIgnoreCase("Ablageort")) {
-          Gson gson = new Gson();
-          Ablageort ort = gson.fromJson(elemName, Ablageort.class);
-          elemName = ort.getName();
-          Object o = fs.write(ort);
-          if(o instanceof File) {
-            File file = (File) o;
-            logger.log(Level.INFO, "Datei {0} geschrieben.", file.getAbsolutePath());
-          }
+    String[] elems = path.split(Server.SLASH);
+    String type = elems[elems.length - 2];
+    String elemName = elems[elems.length - 1]; // alter Name, wenn Aenderung
+    if(!elemName.equalsIgnoreCase(App.getRs(RB_EP_LISTE))) {
+      FileStorage fs = new FileStorage(App.getInitParameter(App.getRs(App.RB_AP_CONF)));
+      Gson gson = new Gson();
+      logger.log(Level.FINE, "type: {0}, token: {1}", new Object[]{type, fs.typeFromName(type).getType().getTypeName()});
+      Object o = gson.fromJson(bodyLesen(e), fs.typeFromName(type).getType());
+      if(o instanceof Entity) {
+        Entity entity = (Entity) o;
+        if(fs.exists(type, elemName)) {
+          fs.delete(type, elemName);
+          fs.write(entity, true);
+        } else {
+          fs.write(entity, false);
         }
-        break;
-        
-      case HTTP_DELETE:
-        type = elems[elems.length - 2];
-        elemName = elems[elems.length - 1];
-        break;
+        return type + Server.SLASH + entity.getName();
+      } else {
+        return "Ungueltiges Objekt im Body.";
+      }
+    } else {
+      return "Ungueltiger Elementname: " + App.getRs(RB_EP_LISTE);
     }
-    
-    
-    String response = "Method: " + method + ", Path: " + path + 
-            ", Type: " + type + ", elemName: " + elemName;
-    logger.info(response);
-    e.sendResponseHeaders(200, response.length());
-    OutputStream os = e.getResponseBody();
-    os.write(response.getBytes());
-    os.close();        
   }
   
+  private boolean loeschen(HttpExchange e) {
+    String path = e.getRequestURI().toString();
+    String[] elems = path.split(Server.SLASH);
+    String type = elems[elems.length - 2];
+    String elemName = elems[elems.length - 1];
+    FileStorage fs = new FileStorage(App.getInitParameter(App.getRs(App.RB_AP_CONF)));
+    return fs.delete(type, elemName);
+  }
   
-  private String bodyLesen(HttpExchange e) throws IOException {
-    InputStream is = e.getRequestBody();
-    BufferedReader r = new BufferedReader(new InputStreamReader(is));
-    StringBuilder sb = new StringBuilder();
-    String line = r.readLine();
-    while(line != null) {
-      sb.append(line);
-      line = r.readLine();
+  private String lesen(HttpExchange e) {
+    String path = e.getRequestURI().toString();
+    String[] elems = path.split(Server.SLASH);
+    FileStorage fs = new FileStorage(App.getInitParameter(App.getRs(App.RB_AP_CONF)));
+    if(path.endsWith(Server.SLASH)) {
+      List list = null;
+      if(elems[elems.length - 1].equalsIgnoreCase(App.getRs(RB_EP_LISTE))) {
+        String type = elems[elems.length - 2];
+        logger.fine(type);
+        list = fs.list(type);
+      } else {
+        String type = elems[elems.length - 1];
+        logger.fine(type);
+        list = fs.listObjects(type);
+      }
+      return jsonWithEnclosingType(list);
+    } else {
+      String type = elems[elems.length - 2];
+      String elemName = elems[elems.length - 1];
+      return fs.readJson(type, elemName);
     }
-    r.close();
-    // {"Ablageort":{"name":"test1","ort":"test2","url":"test3"}}
-    //String data = sb.toString();
-    //data = data.substring(1, data.length() - 1);
-    //String json = data.substring(data.indexOf("{"));
-    // {"name":"test1","ort":"test2","url":"test3"}
-    String json = sb.toString();
-    logger.info("json: " + json);
-    return json;
+  }
+  
+  @Override
+  public String get(HttpExchange e) {
+    return lesen(e);
+  }
+
+  @Override
+  public String post(HttpExchange e) {
+    return "nicht unterstuetzt";
+  }
+
+  @Override
+  public boolean delete(HttpExchange e) {
+    return loeschen(e);
   }
 }

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