From b4d146104811dea993d9eb37f1bb0cb58cb13085 Mon Sep 17 00:00:00 2001
From: "navid.sassan" <navid.sassan@linuxfabrik.ch>
Date: Mon, 23 Nov 2020 17:03:39 +0100
Subject: [PATCH] solved s09 ex3

---
 09/src/main/java/ch/zhaw/ads/Competitor.java |  9 ++-
 09/src/main/java/ch/zhaw/ads/HashServer.java | 72 ++++++++++++++++++++
 2 files changed, 79 insertions(+), 2 deletions(-)
 create mode 100644 09/src/main/java/ch/zhaw/ads/HashServer.java

diff --git a/09/src/main/java/ch/zhaw/ads/Competitor.java b/09/src/main/java/ch/zhaw/ads/Competitor.java
index 33635c7..714001b 100644
--- a/09/src/main/java/ch/zhaw/ads/Competitor.java
+++ b/09/src/main/java/ch/zhaw/ads/Competitor.java
@@ -1,3 +1,5 @@
+package ch.zhaw.ads;
+
 import java.util.*;
 import java.text.*;
 
@@ -43,6 +45,9 @@ public class Competitor implements Comparable<Competitor>  {
     public String toString() {
         SimpleDateFormat df = new SimpleDateFormat("HH:mm:ss.S");
         StringBuilder sb = new StringBuilder();
+        sb.append(" Rank: ");
+        sb.append(rank);
+        sb.append(" ");
         sb.append(" Start Nr: ");
         sb.append(startNr);
         sb.append(" ");
@@ -59,7 +64,7 @@ public class Competitor implements Comparable<Competitor>  {
     @Override
     public int compareTo(Competitor toCompare) {
         int c = name.compareTo(toCompare.name);
-        c = (c != 0)?c:jg - toCompare.jg;
+        c = (c != 0) ? c : jg - toCompare.jg;
         return c;
     }
 
@@ -78,4 +83,4 @@ public class Competitor implements Comparable<Competitor>  {
     }
 
 
-}
\ No newline at end of file
+}
diff --git a/09/src/main/java/ch/zhaw/ads/HashServer.java b/09/src/main/java/ch/zhaw/ads/HashServer.java
new file mode 100644
index 0000000..2b51c96
--- /dev/null
+++ b/09/src/main/java/ch/zhaw/ads/HashServer.java
@@ -0,0 +1,72 @@
+package ch.zhaw.ads;
+
+import java.util.Map;
+import java.util.HashMap;
+
+
+public class HashServer implements CommandExecutor {
+
+    private Map<String, Competitor> competitors;
+
+    @Override
+    public String execute(String command) {
+        if (command.toUpperCase().startsWith("GET")) {
+            Competitor competitor = competitors.get(command.split(" ", 2)[1]);
+            if (competitor == null) {
+                return "Competitor not found.\n";
+            }
+            StringBuilder stringBuilder = new StringBuilder();
+            stringBuilder.append(competitor.getName());
+            stringBuilder.append(" ");
+            stringBuilder.append(competitor.getJg());
+            stringBuilder.append(" -> ");
+            stringBuilder.append(competitor.toString());
+            stringBuilder.append("\n");
+
+            return stringBuilder.toString();
+        } else {
+            this.competitors = this.parseCSV(command);
+            return "Parsed CSV.\n";
+        }
+    }
+
+    /**
+     * NOTE ABOUT CSV FORMAT (from `man virt-diff`)
+     *        Comma-separated values (CSV) is a deceptive format.  It seems like it should be easy to parse,
+     *        but it is definitely not easy to parse.
+     *
+     *        Myth: Just split fields at commas.  Reality: This does not work reliably.  This example has two
+     *        columns:
+     *
+     *         "foo,bar",baz
+     *
+     *        Myth: Read the file one line at a time.  Reality: This does not work reliably.  This example has
+     *        one row:
+     *
+     *         "foo
+     *         bar",baz
+     */
+    private Map<String, Competitor> parseCSV(String csv) {
+        int startNr, jg;
+        String name, country, time;
+
+        Map<String, Competitor> competitors = new HashMap<String, Competitor>();
+        for (String record : csv.split("\\r?\\n")) {
+            String[] values = record.split(";");
+
+            try {
+                startNr = Integer.valueOf(values[0]);
+                name = values[1];
+                jg = Integer.valueOf(values[2]);
+                country = values[3];
+                time = values[4];
+                competitors.put(String.join(";", name, values[2]), new Competitor(startNr, name, jg, country, time));
+            } catch (Exception e) {
+                System.err.println("Failed to add competitor.");
+                e.printStackTrace();
+                continue;
+            }
+        }
+        return competitors;
+    }
+}