Initial commit: Kareer, a Kirigami job application tracker

C++/Qt6/KDE Frameworks 6 app with a SQLite-backed data layer, a
Sankey-diagram dashboard, and a full CLI (add/list/show/update/stage/
delete/stats/stages) for scripting from other tools.

src/statsmodel.cpp

@@ -0,0 +1,100 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+#include "statsmodel.h"
+#include "jobstage.h"
+
+using namespace Qt::Literals::StringLiterals;
+
+StatsModel::StatsModel(QObject *parent)
+    : QObject(parent)
+{
+    refresh();
+}
+
+void StatsModel::refresh()
+{
+    m_jobs = m_db.allJobs();
+    Q_EMIT changed();
+}
+
+int StatsModel::totalApplications() const
+{
+    return m_jobs.size();
+}
+
+int StatsModel::activeApplications() const
+{
+    int count = 0;
+    for (const Job &job : m_jobs) {
+        if (!JobStage::isTerminal(job.stage)) {
+            ++count;
+        }
+    }
+    return count;
+}
+
+int StatsModel::offerCount() const
+{
+    int count = 0;
+    for (const Job &job : m_jobs) {
+        if (job.stage == QLatin1String("Offer") || job.stage == QLatin1String("Accepted")) {
+            ++count;
+        }
+    }
+    return count;
+}
+
+int StatsModel::acceptedCount() const
+{
+    int count = 0;
+    for (const Job &job : m_jobs) {
+        if (job.stage == QLatin1String("Accepted")) {
+            ++count;
+        }
+    }
+    return count;
+}
+
+int StatsModel::rejectedCount() const
+{
+    int count = 0;
+    for (const Job &job : m_jobs) {
+        if (job.stage == QLatin1String("Rejected")) {
+            ++count;
+        }
+    }
+    return count;
+}
+
+double StatsModel::responseRate() const
+{
+    if (m_jobs.isEmpty()) {
+        return 0.0;
+    }
+    int responded = 0;
+    for (const Job &job : m_jobs) {
+        if (job.stage != QLatin1String("Applied")) {
+            ++responded;
+        }
+    }
+    return 100.0 * responded / m_jobs.size();
+}
+
+double StatsModel::offerRate() const
+{
+    if (m_jobs.isEmpty()) {
+        return 0.0;
+    }
+    return 100.0 * offerCount() / m_jobs.size();
+}
+
+QVariantMap StatsModel::stageCounts() const
+{
+    QVariantMap counts;
+    for (const QString &stage : JobStage::canonicalStages()) {
+        counts.insert(stage, 0);
+    }
+    for (const Job &job : m_jobs) {
+        counts[job.stage] = counts.value(job.stage, 0).toInt() + 1;
+    }
+    return counts;
+}