scheme: refactor schemes

Schemes can have multiple flavours, and each flavour can have a light/dark mode

scheme/main.fish

@@ -1,32 +1,76 @@
 #!/bin/fish
 
+# Usage:
+#   caelestia scheme <scheme> <flavour> [mode]
+#   caelestia scheme <scheme> [flavour]
+#   caelestia scheme [scheme]
+
+function set-scheme -a path name mode
+    mkdir -p $C_STATE/scheme
+
+    # Update scheme colours
+    cp $path $C_STATE/scheme/current.txt
+
+    # Update scheme name
+    echo -n $name > $C_STATE/scheme/current-name.txt
+
+    # Update scheme mode
+    echo -n $mode > $C_STATE/scheme/current-mode.txt
+
+    log "Changed scheme to $name ($mode)"
+end
+
 set -l src (dirname (status filename))/..
+set -l schemes $src/data/schemes
 
 . $src/util.fish
 
-set -l valid_schemes (path change-extension '' $src/data/schemes/* | sed 's!.*/!!')
-set -l light_schemes latte
+set -l valid_schemes (basename -a $schemes/*)
 
 test -z "$argv" && set -l argv[1] (random choice $valid_schemes)
 
 if contains -- "$argv[1]" $valid_schemes
-    mkdir -p $C_STATE/scheme
+    set -l flavours (basename -a (find $schemes/$argv[1]/ -mindepth 1 -maxdepth 1 -type d) 2> /dev/null)
+    set -l modes (basename -s .txt (find $schemes/$argv[1]/ -mindepth 1 -maxdepth 1 -type f) 2> /dev/null)
 
-    # Update scheme colours
-    cp $src/data/schemes/$argv[1].txt $C_STATE/scheme/current.txt
+    if test -n "$modes"
+        # Scheme only has one flavour, so second arg is mode
+        if test -z "$argv[2]"
+            # Try to use current mode if not provided and current mode exists for flavour, otherwise random mode
+            set argv[2] (cat $C_STATE/scheme/current-mode.txt 2> /dev/null)
+            contains -- "$argv[2]" $modes || set argv[2] (random choice $modes)
+        end
 
-    # Update scheme name
-    echo -n $argv[1] > $C_STATE/scheme/current-name.txt
-
-    # Update scheme mode
-    if test $argv[1] = dynamic
-        set colour_scheme (cat $C_STATE/scheme/dynamic-mode.txt)
+        if contains -- "$argv[2]" $modes
+            # Provided valid mode
+            set-scheme $schemes/$argv[1]/$argv[2].txt $argv[1] $argv[2]
+        else
+            error "Invalid mode for $argv[1]: $argv[2]"
+        end
     else
-        contains -- "$argv[1]" $light_schemes && set colour_scheme light || set colour_scheme dark
-    end
-    echo -n $colour_scheme > $C_STATE/scheme/current-mode.txt
+        # Scheme has multiple flavours, so second arg is flavour
+        test -z "$argv[2]" && set -l argv[2] (random choice $flavours)
 
-    log "Changed scheme to $argv[1]"
+        if contains -- "$argv[2]" $flavours
+            # Provided valid flavour
+            set -l modes (basename -s .txt $schemes/$argv[1]/$argv[2]/*.txt)
+            if test -z "$argv[3]"
+                # Try to use current mode if not provided and current mode exists for flavour, otherwise random mode
+                set argv[3] (cat $C_STATE/scheme/current-mode.txt 2> /dev/null)
+                contains -- "$argv[3]" $modes || set argv[3] (random choice $modes)
+            end
+
+            if contains -- "$argv[3]" $modes
+                # Provided valid mode
+                set-scheme $schemes/$argv[1]/$argv[2]/$argv[3].txt $argv[1]-$argv[2] $argv[3]
+            else
+                error "Invalid mode for $argv[1] $argv[2]: $argv[3]"
+            end
+        else
+            # Invalid flavour
+            error "Invalid flavour for $argv[1]: $argv[2]"
+        end
+    end
 else
     error "Invalid scheme: $argv[1]"
 end