XDG: Add methods to get the XDG_DATA_HOME path

Gets the path from the environment variable or uses the default path.
Additionally provides a method for getting the "dome-key" subdirectory
in XDG_DATA_HOME.

2 files changed, 25 insertions, 0 deletions

diff --git a/DomeKey/XDG.h b/DomeKey/XDG.h
index a633fa7..de020b5 100644
--- a/DomeKey/XDG.h
+++ b/DomeKey/XDG.h
@@ -10,4 +10,7 @@
 
 @interface XDG : NSObject
 
++ (NSURL *)dataPath;
++ (NSURL *)domeKeyDataPath;
+
 @end
diff --git a/DomeKey/XDG.m b/DomeKey/XDG.m
index 5d2b4d1..5127739 100644
--- a/DomeKey/XDG.m
+++ b/DomeKey/XDG.m
@@ -8,6 +8,28 @@
 
 #import "XDG.h"
 
+static NSString * const DOME_KEY_DIR = @"dome-key";
+
 @implementation XDG
 
++ (NSURL *)dataPath
+{
+    NSString *xdg_data_home = [[[NSProcessInfo processInfo] environment]
+        objectForKey:@"XDG_DATA_HOME"];
+
+    if (!xdg_data_home) {
+        // xdg_data_home = @"~/.local/share";
+        xdg_data_home = [@"~/.local/share" stringByExpandingTildeInPath];
+    }
+
+    return [NSURL fileURLWithPath:xdg_data_home isDirectory:YES];
+}
+
++ (NSURL *)domeKeyDataPath
+{
+    return [[self dataPath]
+        URLByAppendingPathComponent:DOME_KEY_DIR
+        isDirectory:YES];
+}
+
 @end