Add graph, analyzers, and exporters modules

src/exporters/png.py

@@ -0,0 +1,60 @@
+import subprocess
+from pathlib import Path
+
+from src.graph.builder import GraphBuilder
+from src.exporters.dot import DOTExporter
+
+
+class PNGExporter:
+    def __init__(self, graph_builder: GraphBuilder):
+        self.graph_builder = graph_builder
+        self.dot_exporter = DOTExporter(graph_builder)
+
+    def export(
+        self,
+        output_path: Path,
+        layout: str = "dot",
+        rankdir: str = "TB",
+        format: str = "png",
+    ) -> None:
+        dot_content = self.dot_exporter.get_string(layout=layout, rankdir=rankdir)
+
+        self._render_graph(dot_content, output_path, format)
+
+    def export_to_svg(self, output_path: Path, layout: str = "dot", rankdir: str = "TB") -> None:
+        dot_content = self.dot_exporter.get_string(layout=layout, rankdir=rankdir)
+        self._render_graph(dot_content, output_path, "svg")
+
+    def _render_graph(self, dot_content: str, output_path: Path, format: str) -> None:
+        try:
+            subprocess.run(
+                ["dot", f"-T{format}", "-o", str(output_path)],
+                input=dot_content,
+                capture_output=True,
+                text=True,
+                check=True,
+            )
+        except FileNotFoundError:
+            raise RuntimeError(
+                "Graphviz is not installed. Please install it with: "
+                "apt-get install graphviz (Ubuntu) or brew install graphviz (macOS)"
+            )
+        except subprocess.CalledProcessError as e:
+            raise RuntimeError(f"Graphviz rendering failed: {e.stderr}")
+
+    def preview(self, layout: str = "dot") -> None:
+        dot_content = self.dot_exporter.get_string(layout=layout)
+
+        try:
+            result = subprocess.run(
+                ["dot", "-Tpng"],
+                input=dot_content,
+                capture_output=True,
+                check=True,
+            )
+            print(f"PNG preview generated ({len(result.stdout)} bytes)")
+        except FileNotFoundError:
+            print("Graphviz not installed for preview")
+
+    def get_available_layouts(self) -> list[str]:
+        return ["dot", "neato", "fdp", "sfdp", "twopi", "circo"]