Show person's relations in PersonActivity

app/src/main/java/com/teinvdlugt/android/greekgods/DBUtils.java

@@ -18,7 +18,8 @@
 
 public class DBUtils {
     /**
-     * Format this String using one argument, being the id of the person
+     * Format this String using one argument, being the id
+     * of the person you want to know the parents of
      */
     public static final String PARENTS_QUERY = "SELECT p.name\n" +
             "FROM people p\n" +
@@ -40,4 +41,18 @@ public class DBUtils {
             "  ))\n" +
             ")";
 
+    /**
+     * Format this String using one argument, being the id of
+     * the person you want to know the relations of
+     */
+    public static final String RELATIONS_QUERY = "SELECT\n" +
+            "  p.personId,\n" +
+            "  p.name,\n" +
+            "  r.relatiod_id\n" +
+            "FROM people p, relations r\n" +
+            "WHERE (r.personId1 = %1$d AND p.personId = r.personId2)\n" +
+            "      OR (r.personId2 = %1$d AND p.personId = r.personId1)\n" +
+            "      OR (((r.personId1 IS NULL AND r.personId2 = %1$d)\n" +
+            "           OR r.personId2 IS NULL AND r.personId1 = %1$d) AND p.personId = %1$d)";
+
 }

app/src/main/java/com/teinvdlugt/android/greekgods/PersonActivity.java

@@ -62,7 +62,7 @@ private void refresh() {
         new AsyncTask<Void, Void, Void>() {
             private String name;
             private List<String> parents;
-            private String relations;
+            private List<String> relations;
 
             @Override
             protected Void doInBackground(Void... params) {
@@ -99,6 +99,24 @@ protected Void doInBackground(Void... params) {
                     if (c != null) c.close();
                 }
 
+                // Relations
+                try {
+                    String relationsQuery = String.format(DBUtils.RELATIONS_QUERY, personId);
+                    c = db.rawQuery(relationsQuery, null);
+                    int nameColumn = c.getColumnIndex("name");
+                    int relationIdColumn = c.getColumnIndex("relatiod_id");
+                    c.moveToFirst();
+                    relations = new ArrayList<>();
+                    do {
+                        relations.add(c.getString(nameColumn));
+                    } while (c.moveToNext());
+                } catch (SQLiteException e) {
+                    e.printStackTrace();
+                } catch (CursorIndexOutOfBoundsException ignored) {
+                } finally {
+                    if (c != null) c.close();
+                }
+
                 db.close();
                 return null;
             }
@@ -118,6 +136,16 @@ protected void onPostExecute(Void aVoid) {
                     sb.delete(sb.length() - 2, sb.length());
                     parentsTextView.setText(sb);
                 }
+                if (relations == null || relations.isEmpty()) {
+                    relationsTextView.setText(R.string.no_relations);
+                } else {
+                    StringBuilder sb = new StringBuilder();
+                    for (String relation : relations) {
+                        sb.append(relation).append("\n");
+                    }
+                    sb.delete(sb.length() - 1, sb.length());
+                    relationsTextView.setText(sb);
+                }
             }
         }.execute();
     }

app/src/main/res/values/strings.xml

@@ -9,4 +9,5 @@
     <string name="person">Persoon</string>
     <string name="something_went_wrong">Er is iets mis gegaan</string>
     <string name="no_parents">Geen ouders</string>
+    <string name="no_relations">Geen relaties</string>
 </resources>

sql/relationsofperson.sql

@@ -0,0 +1,9 @@
+SELECT
+  p.personId,
+  p.name,
+  r.relatiod_id
+FROM kcv.people p, kcv.relations r
+WHERE (r.personId1 = 64 AND p.personId = r.personId2)
+      OR (r.personId2 = 64 AND p.personId = r.personId1)
+      OR (((r.personId1 IS NULL AND r.personId2 = 64)
+           OR r.personId2 IS NULL AND r.personId1 = 64) AND p.personId = 64)