2 files changed, 115 insertions, 5 deletions

diff --git a/src/discipline/Sport.cpp b/src/discipline/Sport.cpp
index ed8331d..05ba95e 100644
--- a/src/discipline/Sport.cpp
+++ b/src/discipline/Sport.cpp
@@ -1,12 +1,34 @@
 
 #include "Sport.h"
 #include <set>
+#include <algorithm>
 
 #include <QJsonObject>
 #include <QJsonArray>
 #include <QJsonValueRef>
 #include <QString>
 
+// static compare function for specific attribute in competitors
+function<bool (const QJsonValue &left, const QJsonValue &right)> genCompare(QString attribute) {
+    return [attribute](const QJsonValue &left, const QJsonValue &right) {
+        QString l = left.toObject()[attribute].toString();
+        QString r = right.toObject()[attribute].toString();
+        return l.compare(r) < 0;
+    };
+}
+
+// static compare function for the results of a competitor in a specific competition (also called mark)
+bool compareMark(const QJsonValue &left, const QJsonValue &right) {
+    QJsonObject l = left.toObject();
+    if (!l.contains("results")) return true;
+    QJsonObject r = right.toObject();
+    if (!r.contains("results")) return false;
+
+    float lMark = l["results"].toObject()["mark"].toString().toFloat();
+    float rMark = r["results"].toObject()["mark"].toString().toFloat();
+    return lMark < rMark;
+}
+
 
 /**
  * @brief Sport::getCategories Reads all possible categories (also called units).
@@ -44,5 +66,65 @@ QJsonArray Sport::getCompetitorsByCategory(QString category) {
         }
     }
 
-    return competitors;
+    return QJsonArray(competitors);
+}
+
+/**
+ * @brief Sport::filterByName Filter the competitors by name (case insensitive).
+ * @param competitors The competitors of one category.
+ * @param name The (part of the) name to search for.
+ */
+void Sport::filterByName(QJsonArray &competitors, QString name) {
+    filterCompetitors(competitors, QString("name"), name);
+}
+
+/**
+ * @brief Sport::filterByCountry Filter the competitors by their national olympics comittee (case insensitive, short form).
+ * @param competitors The competitors of one category.
+ * @param nocShort The (part of the) national olympics comittee short name to search for.
+ */
+void Sport::filterByCountry(QJsonArray &competitors, QString nocShort) {
+    filterCompetitors(competitors, QString("noc"), nocShort);
+}
+
+void Sport::filterCompetitors(QJsonArray &competitors, QString attribute, QString filter) {
+    for (int i = 0; i < competitors.size(); i++) {
+
+        if (!competitors[i].toObject()[attribute].toString().contains(filter, Qt::CaseInsensitive)) {
+            // remove the competitor, if the attribute does not fit the filter string
+            competitors.removeAt(i);
+            i--;
+        }
+
+    }
+}
+
+/**
+ * @brief Sport::sortByName Sort the competitors by their name (alphabetical, ascending).
+ * @param competitors The competitors of one category.
+ */
+void Sport::sortByName(QJsonArray &competitors) {
+    sortCompetitors(competitors, genCompare( QString("name") ));
 }
+
+/**
+ * @brief Sport::sortByCountry Sort the competitors by their national olympic comittee short name (alphabetical, ascending).
+ * @param competitors The competitors of one category.
+ */
+void Sport::sortByCountry(QJsonArray &competitors) {
+    sortCompetitors(competitors, genCompare( QString("noc") ));
+}
+
+/**
+ * @brief Sport::sortByResult Sort the competitors by their results in one specific category (numerical, ascending).
+ * @param competitors The competitors of one category.
+ */
+void Sport::sortByResult(QJsonArray &competitors) {
+    sortCompetitors(competitors, compareMark);
+}
+
+void Sport::sortCompetitors(QJsonArray &competitors, function<bool (const QJsonValue &left, const QJsonValue &right)> compare) {
+    make_heap(competitors.begin(), competitors.end(), compare);
+    sort_heap(competitors.begin(), competitors.end(), compare);
+}
+
diff --git a/src/discipline/Sport.h b/src/discipline/Sport.h
index 9c993fb..3b1c7f4 100644
--- a/src/discipline/Sport.h
+++ b/src/discipline/Sport.h
@@ -23,18 +23,46 @@ public:
     set<QString> getCategories();
     QJsonArray getCompetitorsByCategory(QString category);
 
-    // chainable
-    QJsonObject filterByName(QJsonObject discipline, QString name);
-    QJsonObject filterByCountry(QJsonObject discipline, QString name);
+    // filter to change the current competitor array
+    void filterByName(QJsonArray& competitors, QString name);
+    void filterByCountry(QJsonArray& competitors, QString nocShort);
+
+    // sort functions to change the order of the current competitor array
+    void sortByName(QJsonArray &competitors);
+    void sortByCountry(QJsonArray &competitors);
+    void sortByResult(QJsonArray &competitors);
 
     void setDiscipline(QJsonObject discipline) {
-        this->discipline = discipline;
+        this->discipline = QJsonObject(discipline);
     }
 
 private:
 
+    /*
+     * Analysis of provided competitor objects:
+     *
+     * Attributes:
+     * - code
+     * - noc (national olympics comittee)
+     * - name (sometimes the country name? mostly the competitors name)
+     * - order
+     * [- results] (only if the results are out!)
+     *
+     *
+     * Analysis of provided result objects:
+     *
+     * Attributes:
+     * - position
+     * - mark
+     * - medalType
+     * - irk
+     * [- winnerLoserTie] (only if provided in the discipline?)
+     */
     QJsonObject discipline;
 
+    void filterCompetitors(QJsonArray& competitors, QString attribute, QString filter);
+    void sortCompetitors(QJsonArray &competitors,  function<bool (const QJsonValue &left, const QJsonValue &right)> compare);
+
 };