From bc203aaff171438b250a84f052c922e87cdbef83 Mon Sep 17 00:00:00 2001
From: Joscha <joscha@plugh.de>
Date: Thu, 16 May 2019 11:12:39 +0000
Subject: [PATCH] Create palette from config and add default config

---
 cheuph/euphoria/__init__.py |  4 +--
 cheuph/euphoria/palette.py  | 11 --------
 cheuph/euphoria/util.py     | 56 +++++++++++++++++++++++++++++++++++++
 3 files changed, 58 insertions(+), 13 deletions(-)
 delete mode 100644 cheuph/euphoria/palette.py
 create mode 100644 cheuph/euphoria/util.py

diff --git a/cheuph/euphoria/__init__.py b/cheuph/euphoria/__init__.py
index 83b96a0..46b26d5 100644
--- a/cheuph/euphoria/__init__.py
+++ b/cheuph/euphoria/__init__.py
@@ -1,8 +1,8 @@
 from typing import List
 
-from .palette import *
 from .single_room_application import *
+from .util import *
 
 __all__: List[str] = []
-__all__ += palette.__all__
 __all__ += single_room_application.__all__
+__all__ += util.__all__
diff --git a/cheuph/euphoria/palette.py b/cheuph/euphoria/palette.py
deleted file mode 100644
index a4c480e..0000000
--- a/cheuph/euphoria/palette.py
+++ /dev/null
@@ -1,11 +0,0 @@
-import enum
-
-__all__ = ["Style", "PALETTE"]
-
-@enum.unique
-class Style(enum.Enum):
-    ROOM = "room"
-
-PALETTE = [
-    (Style.ROOM, "light blue,bold", ""),
-]
diff --git a/cheuph/euphoria/util.py b/cheuph/euphoria/util.py
new file mode 100644
index 0000000..480a16e
--- /dev/null
+++ b/cheuph/euphoria/util.py
@@ -0,0 +1,56 @@
+from typing import List, Tuple, Union
+
+from ..config import Config
+
+__all__ = ["UtilException","Palette", "palette_from_config", "DEFAULT_CONFIG"]
+
+class UtilException(Exception):
+    pass
+
+Palette = List[Union[Tuple[str, str], Tuple[str, str, str],
+    Tuple[str, str, str, str]]]
+
+def palette_from_config(conf: Config) -> Palette:
+    palette: Palette = []
+
+    styles = conf.tree["style"]
+    for style, info in styles.items():
+        # First, do the alias stuff
+        alias = info.get("alias")
+        if isinstance(alias, str):
+            if alias in styles:
+                palette.append((style, alias))
+                continue
+            else:
+                raise UtilException((f"style.{style}.alias must be the name of"
+                    " another style"))
+        elif alias is not None:
+            raise UtilException(f"style.{style}.alias must be a string")
+
+        # Foreground/background
+        fg = info.get("fg")
+        bg = info.get("bg")
+
+        if not isinstance(fg, str) and fg is not None:
+            raise TypeError(f"style.{style}.fg must be a string")
+
+        if not isinstance(bg, str) and bg is not None:
+            raise TypeError(f"style.{style}.bg must be a string")
+
+        fg = fg or ""
+        bg = bg or ""
+
+        palette.append((style, fg, bg))
+
+    return palette
+
+DEFAULT_CONFIG = {
+    "element": {
+        "room": "room",
+    },
+    "style": {
+        "room": {
+            "fg": "light blue, bold",
+        },
+    },
+}