From 4a3508440e4c01f1958ceb3baa75adff7e002fd5 Mon Sep 17 00:00:00 2001
From: ulrich
Date: Wed, 21 Apr 2021 07:01:15 +0000
Subject: [PATCH] Gestaltung der Schaltansicht fuer Geraete angepasst

---
 src/de/uhilger/mediaz/api/StorageHandler.java |  260 ++++++++++++++++++++++++---------------------------
 1 files changed, 121 insertions(+), 139 deletions(-)

diff --git a/src/de/uhilger/mediaz/api/StorageHandler.java b/src/de/uhilger/mediaz/api/StorageHandler.java
index f022ada..9d9a4be 100644
--- a/src/de/uhilger/mediaz/api/StorageHandler.java
+++ b/src/de/uhilger/mediaz/api/StorageHandler.java
@@ -19,167 +19,110 @@
 
 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 static de.uhilger.mediaz.App.RB_EP_LISTE_ALLES;
 import de.uhilger.mediaz.Server;
-import static de.uhilger.mediaz.Server.RB_SLASH;
 import de.uhilger.mediaz.store.FileStorage;
 import de.uhilger.mediaz.entity.Entity;
-import java.io.BufferedReader;
-import java.io.File;
+import de.uhilger.mediaz.entity.Geraet;
+import static de.uhilger.mediaz.store.FileStorage.ST_ABLAGEORT;
+import static de.uhilger.mediaz.store.FileStorage.ST_GERAET;
+import de.uhilger.mediaz.store.Storage;
 import java.io.IOException;
-import java.io.InputStream;
-import java.io.InputStreamReader;
-import java.io.OutputStream;
+import java.net.URI;
+import java.util.Iterator;
 import java.util.List;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 
+import java.net.http.HttpClient;
+import java.net.http.HttpClient.Version;
+import java.net.http.HttpClient.Redirect;
+import java.net.http.HttpRequest;
+import java.net.http.HttpResponse;
+import java.net.http.HttpResponse.BodyHandlers;
+import java.time.Duration;
+import java.util.ArrayList;
+
+
 /**
  * HttpHandler fuer die Verwaltung von Entitaeten der Mediazentrale
+ * 
+ * /mz/api/store/[name]/liste
+ * /mz/api/store/[name]/listealles  (nur Typ Geraet)
  * 
  * @author Ulrich Hilger
  * @version 1, 5.4.2021
  */
-public class StorageHandler extends AbstractHandler implements HttpHandler {
+public class StorageHandler extends AbstractHandler {
   
   private static final Logger logger = Logger.getLogger(StorageHandler.class.getName());
 
-  
-  /*
-    Das REST-Muster sieht je Entitaet fuenf Faelle vor (Beispiel Ablageort):
-    
-    1. HTTP GET Ablageort/[Name]: Liefere den Ablageort als JSON
-    2. HTTP GET Ablageort/: Liefere einer Liste von Ablageorten als JSON
-    3. HTTP PUT: schreibe einen neuen Ablageort auf die Platte
-    4. HTTP POST: schreibe Aenderungen auf die Platte
-    5. HTTP DELETE: loesche den Ablageort
-  
-    Beispiele:
-  
-    HTTP GET an /mz/api/store/Ablageort/
-    liefert eine Liste der Namen vorhandener Ablageorte
-  
-    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"
-  
-  */
-  
-  /** Name der HTTP Methode GET */
-  public static final String HTTP_GET = "GET";
-  
-  /** Name der HTTP Methode PUT */
-  public static final String HTTP_PUT = "PUT";
-  
-  /** Name der HTTP Methode POST */
-  public static final String HTTP_POST = "POST";
-  
-  /** Name der HTTP Methode DELETE */
-  public static final String HTTP_DELETE = "DELETE";
-
   @Override
-  public void handle(HttpExchange e) throws IOException {
-    String method = e.getRequestMethod();
-    String response = "";
-    int code = 200;
-    switch(method) {
-      case HTTP_GET:
-        String json = lesen(e);
-        if(json != null) {
-          response = json;
-        } else {
-          response = "nicht gefunden";
-          code = 404;
-        }
-        break;
-        
-      case HTTP_PUT:
-        response = aendern(e);
-        break;
-        
-      case HTTP_POST:
-        response = neu(e);
-        break;
-        
-      case HTTP_DELETE:
-        boolean geloescht = loeschen(e);
-        if(geloescht) {
-          response = "geloescht";
-        } else {
-          response = "nicht geloescht";
-        }
-        break;
-    }
-    logger.fine(response);
-    e.sendResponseHeaders(code, response.length());
-    OutputStream os = e.getResponseBody();
-    os.write(response.getBytes());
-    os.close();        
-  }
-  
-  private String neu(HttpExchange e) throws IOException {
-    return schreiben(e, false);
-  }
-  
-  private String aendern(HttpExchange e) throws IOException {
-    return schreiben(e, true);
-  }
-  
-  private String schreiben(HttpExchange e, boolean overwrite) throws IOException {
+  protected String put(HttpExchange e) throws IOException {
     String path = e.getRequestURI().toString();
-    String[] elems = path.split(App.getRs(Server.RB_SLASH));
-    String type = elems[elems.length - 1];
-    String body = bodyLesen(e);
-    String filename = ""; 
-    FileStorage fs = new FileStorage(App.getInitParameter(App.getRs(App.RB_AP_CONF)));
-    Gson gson = new Gson();
-    logger.log(Level.FINE, "type: {0}", type);
-    Object o = gson.fromJson(body, fs.typeFromName(type).getType());
-    if(o instanceof Entity) {
-      Object antwortObjekt = fs.write((Entity) o, overwrite);
-      if(antwortObjekt instanceof File) {
-        File file = (File) antwortObjekt;
-        logger.log(Level.FINE, "Datei {0} geschrieben.", file.getAbsolutePath());
-        filename = file.getName();
-        return type + FileHandler.STR_BLANK + filename;
+    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);
+        }
+        return type + Server.SLASH + entity.getName();
+      } else {
+        return "Ungueltiges Objekt im Body.";
       }
+    } else {
+      return "Ungueltiger Elementname: " + App.getRs(RB_EP_LISTE);
     }
-    return type + FileHandler.STR_BLANK + " Operation 'neu' fuer bereits existierende Entitaet.";
   }
-  
-  /*
-  private String aendern(HttpExchange e) throws IOException {
-    return neu(e); // einstweilen wird einfach ueberschrieben
-  }
-  */
   
   private boolean loeschen(HttpExchange e) {
     String path = e.getRequestURI().toString();
-    String[] elems = path.split(App.getRs(Server.RB_SLASH));
+    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 lesen(HttpExchange e) {
+  private String lesen(HttpExchange e) throws IOException, InterruptedException {
     String path = e.getRequestURI().toString();
-    String[] elems = path.split(App.getRs(Server.RB_SLASH));
+    String[] elems = path.split(Server.SLASH);
     FileStorage fs = new FileStorage(App.getInitParameter(App.getRs(App.RB_AP_CONF)));
-    if(path.endsWith(App.getRs(RB_SLASH))) {
-      String type = elems[elems.length - 1];
-      logger.fine(type);
-      List list = fs.list(type);
+    if(path.endsWith(Server.SLASH)) {
+      List list = null;
+      if(elems[elems.length - 1].equalsIgnoreCase(App.getRs(RB_EP_LISTE_ALLES))) {
+        String type = elems[elems.length - 2];
+        logger.fine(type);
+        if(type.equalsIgnoreCase(ST_GERAET)) {
+          list = collectDeviceStatus(fs, type);
+          Gson gson = new Gson();
+          Object o = gson.fromJson(bodyLesen(e), fs.typeFromName(type).getType());
+          return gson.toJson(list);
+        }
+      } else if(elems[elems.length - 1].equalsIgnoreCase(App.getRs(RB_EP_LISTE))) {
+        String type = elems[elems.length - 2];
+        logger.fine(type);
+        list = fs.list(type);
+        if(type.equalsIgnoreCase(ST_ABLAGEORT)) {
+          list.add("Livestreams");
+        }
+      } else {
+        String type = elems[elems.length - 1];
+        logger.fine(type);
+        list = fs.listObjects(type);
+      }
       return jsonWithEnclosingType(list);
     } else {
       String type = elems[elems.length - 2];
@@ -188,18 +131,57 @@
     }
   }
   
-  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();
+  @Override
+  public String get(HttpExchange e) {
+    try {
+      return lesen(e);
+    } catch (IOException | InterruptedException ex) {
+      Logger.getLogger(StorageHandler.class.getName()).log(Level.SEVERE, null, ex);
+      return ex.getLocalizedMessage();
     }
-    r.close();
-    String json = sb.toString();
-    logger.log(Level.FINE, "json: {0}", json);
-    return json;
+  }
+
+  @Override
+  public String post(HttpExchange e) {
+    return "nicht unterstuetzt";
+  }
+
+  @Override
+  public boolean delete(HttpExchange e) {
+    return loeschen(e);
+  }
+  
+  private List collectDeviceStatus(Storage fs, String type) throws IOException, InterruptedException {
+    List list = fs.listObjects(type);
+    List<Geraet> newList = new ArrayList();
+    Iterator<Entity> i = list.iterator();
+    while (i.hasNext()) {
+      Entity entity = i.next();
+      if (entity instanceof Geraet) {
+        Geraet g = (Geraet) entity;
+        String statusurl = g.getStatusUrl();
+        logger.info(statusurl);
+
+        HttpRequest request = HttpRequest.newBuilder()
+                .uri(URI.create(statusurl))
+                .build();
+        HttpClient client = HttpClient.newBuilder()
+                .version(Version.HTTP_1_1)
+                .followRedirects(Redirect.NORMAL)
+                .connectTimeout(Duration.ofSeconds(20))
+                //.proxy(ProxySelector.of(new InetSocketAddress("proxy.example.com", 80)))
+                //.authenticator(Authenticator.getDefault())
+                .build();
+        HttpResponse<String> response = client.send(request, BodyHandlers.ofString());
+        logger.finer(Integer.toString(response.statusCode()));
+        logger.finer(response.body());
+        // {"ison":false,"has_timer":false,"overpower":false}
+        String[] parts = response.body().split(",")[0].split(":");
+        logger.finer("ison: " + parts[1]);
+        g.setStatus(parts[1]);
+        newList.add(g);
+      }
+    }
+    return newList;
   }
 }

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