1 files changed, 44 insertions, 0 deletions
diff --git a/hyprsunset_qt/config.py b/hyprsunset_qt/config.py
index c2ef010..f8ad5cf 100644
--- a/hyprsunset_qt/config.py
+++ b/hyprsunset_qt/config.py
@@ -38,3 +38,47 @@ def parse_config(text: str) -> list[Profile]:
             )
         )
     return profiles
+
+
+_HEADER = "# Managed by hyprsunset-qt. Edits here are overwritten on save.\n"
+
+
+def _fmt_gamma(g: float) -> str:
+    return f"{g:g}"
+
+
+def serialize(profiles: list[Profile]) -> str:
+    day = day_index(profiles)
+    night = night_index(profiles)
+    parts = [_HEADER]
+    for i, p in enumerate(profiles):
+        if i == day:
+            parts.append("\n# day profile -- sunrise")
+        elif i == night:
+            parts.append("\n# night profile -- sunset")
+        else:
+            parts.append("\n# profile")
+        lines = ["profile {", f"    time = {p.time}"]
+        if p.identity:
+            lines.append("    identity = true")
+        if p.temperature is not None:
+            lines.append(f"    temperature = {p.temperature}")
+        if p.gamma is not None:
+            lines.append(f"    gamma = {_fmt_gamma(p.gamma)}")
+        lines.append("}")
+        parts.append("\n".join(lines))
+    return "\n".join(parts) + "\n"
+
+
+def day_index(profiles: list[Profile]) -> int | None:
+    for i, p in enumerate(profiles):
+        if p.identity:
+            return i
+    return None
+
+
+def night_index(profiles: list[Profile]) -> int | None:
+    for i, p in enumerate(profiles):
+        if p.temperature is not None:
+            return i
+    return None