CLI export: add wiring list and wire-number list (CSV)

Extends the headless command-line export with two CSV outputs:

  qelectrotech --export-cables <project.qet> <output.csv>   wiring list
  qelectrotech --export-wires  <project.qet> <output.csv>   wire numbers

- --export-cables reuses WiringListExport (one row per conductor).
- --export-wires reuses ConductorNumExport::wiresNum() (distinct wire numbers).

WiringListExport::toCsv() mixed CSV generation with the file dialog and
writing.  Extracted the generation into a new const method toCsvString()
that returns the CSV; toCsv() now calls it and writes the result.  This
makes the wiring list usable headlessly with no behavioural change to the
GUI export.

Addresses part of the CLI export requests (#162, #309): @pkess specifically
asked to "export all connections as a list".

sources/cli_export.cpp

@@ -18,10 +18,13 @@
 #include "cli_export.h"
 
 #include "bordertitleblock.h"
+#include "conductornumexport.h"
 #include "diagram.h"
 #include "qetproject.h"
+#include "wiringlistexport.h"
 
 #include <QDir>
+#include <QFile>
 #include <QFileInfo>
 #include <QPainter>
 #include <QPdfWriter>
@@ -40,6 +43,8 @@ const QHash<QString, QString> &exportFlags()
 		{"--export-pdf", "pdf"},
 		{"--export-png", "png"},
 		{"--export-svg", "svg"},
+		{"--export-cables", "cables"},
+		{"--export-wires", "wires"},
 	};
 	return flags;
 }
@@ -159,6 +164,33 @@ int exportImages(QETProject &project, const QString &format,
 	return 0;
 }
 
+int exportCsv(QETProject &project, const QString &format, const QString &output)
+{
+	QString csv;
+	if (format == "cables") {
+		WiringListExport wle(&project, nullptr);
+		csv = wle.toCsvString();
+	} else { // wires
+		ConductorNumExport cne(&project, nullptr);
+		csv = cne.wiresNum();
+	}
+	if (csv.isEmpty()) {
+		err << "Nothing to export (empty list).\n";
+		return 1;
+	}
+
+	QFile file(output);
+	if (!file.open(QIODevice::WriteOnly | QIODevice::Text)) {
+		err << "Cannot open '" << output << "' for writing.\n";
+		return 1;
+	}
+	QTextStream fout(&file);
+	fout << csv;
+	file.close();
+	out << "Exported " << format << " list -> " << output << "\n";
+	return 0;
+}
+
 } // anonymous namespace
 
 namespace CLIExport {
@@ -205,6 +237,8 @@ int run(const QStringList &args)
 	const QString format = exportFlags().value(flag);
 	if (format == "pdf")
 		return exportPdf(project, output);
+	if (format == "cables" || format == "wires")
+		return exportCsv(project, format, output);
 	return exportImages(project, format, output);
 }
 

sources/cli_export.h

@@ -42,12 +42,16 @@ namespace CLIExport {
 		@return process exit code (0 on success).
 
 		Usage:
-		  qelectrotech --export-pdf  <project.qet> <output.pdf>
-		  qelectrotech --export-png  <project.qet> <output_dir>
-		  qelectrotech --export-svg  <project.qet> <output_dir>
+		  qelectrotech --export-pdf    <project.qet> <output.pdf>
+		  qelectrotech --export-png    <project.qet> <output_dir>
+		  qelectrotech --export-svg    <project.qet> <output_dir>
+		  qelectrotech --export-cables <project.qet> <output.csv>
+		  qelectrotech --export-wires  <project.qet> <output.csv>
 
 		PDF: one multi-page document (one diagram per page).
 		PNG/SVG: one file per diagram, named <output_dir>/<NN>_<title>.<ext>.
+		cables: wiring list (one row per conductor) as CSV.
+		wires: list of distinct wire numbers as CSV.
 	*/
 	int run(const QStringList &args);
 

sources/wiringlistexport.cpp

@@ -151,13 +151,39 @@ void WiringListExport::toCsv()
 {
     if (!m_project) return;
 
-    QDomDocument doc = m_project->toXml();
-
-    if (doc.isNull()) {
+    const QString csv = toCsvString();
+    if (csv.isEmpty()) {
         QMessageBox::warning(m_parent, tr("Erreur"), tr("Impossible de lire la structure en mémoire du projet."));
         return;
     }
 
+    QFileDialog dialog(m_parent);
+    dialog.setAcceptMode(QFileDialog::AcceptSave);
+    dialog.setWindowTitle(tr("Exporter le plan de câblage"));
+    dialog.setDefaultSuffix("csv");
+    dialog.setNameFilter(tr("Fichiers CSV (*.csv)"));
+
+    if (dialog.exec() != QDialog::Accepted) return;
+    QString fileName = dialog.selectedFiles().first();
+
+    QFile file(fileName);
+    if (!file.open(QIODevice::WriteOnly | QIODevice::Text)) {
+        QMessageBox::warning(m_parent, tr("Erreur"), tr("Impossible d'ouvrir le fichier pour l'écriture."));
+        return;
+    }
+    QTextStream out(&file);
+    out << csv;
+    file.close();
+    QMessageBox::information(m_parent, tr("Export réussi"), tr("Le plan de câblage a été exporté avec succès !"));
+}
+
+QString WiringListExport::toCsvString() const
+{
+    if (!m_project) return QString();
+
+    QDomDocument doc = m_project->toXml();
+    if (doc.isNull()) return QString();
+
     QSet<QString> conductorDefinitionTypes;
     QDomElement rootElem = doc.documentElement();
     QDomElement collection = rootElem.firstChildElement("collection");
@@ -197,21 +223,6 @@ void WiringListExport::toCsv()
         }
     }
 
-    QFileDialog dialog(m_parent);
-    dialog.setAcceptMode(QFileDialog::AcceptSave);
-    dialog.setWindowTitle(tr("Exporter le plan de câblage"));
-    dialog.setDefaultSuffix("csv");
-    dialog.setNameFilter(tr("Fichiers CSV (*.csv)"));
-
-    if (dialog.exec() != QDialog::Accepted) return;
-    QString fileName = dialog.selectedFiles().first();
-
-    QFile file(fileName);
-    if (!file.open(QIODevice::WriteOnly | QIODevice::Text)) {
-        QMessageBox::warning(m_parent, tr("Erreur"), tr("Impossible d'ouvrir le fichier pour l'écriture."));
-        return;
-    }
-
     QMap<QString, ElementInfo> elementsInfo = collectElementsInfo(doc.documentElement());
     QList<ConductorData> conductors = collectConductors(doc.documentElement());
 
@@ -353,7 +364,8 @@ void WiringListExport::toCsv()
         return a.terminalname2 < b.terminalname2;
     });
 
-    QTextStream out(&file);
+    QString csv;
+    QTextStream out(&csv);
     out << tr("Page", "Wiring list CSV header") << ";"
     << tr("Composant 1", "Wiring list CSV header") << ";"
     << tr("Borne 1", "Wiring list CSV header") << ";"
@@ -376,6 +388,5 @@ void WiringListExport::toCsv()
         << c.function << "\n";
     }
 
-    file.close();
-    QMessageBox::information(m_parent, tr("Export réussi"), tr("Le plan de câblage a été exporté avec succès !"));
+    return csv;
 }

sources/wiringlistexport.h

@@ -45,6 +45,11 @@ class WiringListExport : public QObject
 public:
     explicit WiringListExport(QETProject *project, QWidget *parent = nullptr);
     void toCsv();
+    /**
+        Build the wiring-list CSV and return it as a string (no GUI).
+        Used by toCsv() and by the headless command-line export.
+    */
+    QString toCsvString() const;
 
 private:
     QETProject *m_project;