1 files changed, 40 insertions, 1 deletions
diff --git a/common/src/helpers.rs b/common/src/helpers.rs
index db75ba9..431bf8c 100644
--- a/common/src/helpers.rs
+++ b/common/src/helpers.rs
@@ -4,7 +4,9 @@
     Copyright (C) 2025 metamuffin <metamuffin.org>
 */
 
-use crate::{CreditCategory, IdentifierType};
+use base64::{Engine, prelude::BASE64_URL_SAFE};
+
+use crate::{CreditCategory, IdentifierType, Picture, PictureSlot};
 use std::{fmt::Display, ops::Deref, str::FromStr};
 
 #[derive(PartialEq)]
@@ -129,3 +131,40 @@ impl FromStr for IdentifierType {
         })
     }
 }
+impl Display for PictureSlot {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        f.write_str(match self {
+            PictureSlot::Backdrop => "backdrop",
+            PictureSlot::Cover => "cover",
+        })
+    }
+}
+impl FromStr for PictureSlot {
+    type Err = ();
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        Ok(match s {
+            "backdrop" => PictureSlot::Backdrop,
+            "cover" => PictureSlot::Cover,
+            _ => return Err(()),
+        })
+    }
+}
+
+impl Display for Picture {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        f.write_str(&BASE64_URL_SAFE.encode(self.0))
+    }
+}
+impl FromStr for Picture {
+    type Err = &'static str;
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        let mut out = [0; 32];
+        let size = BASE64_URL_SAFE
+            .decode_slice(s, &mut out)
+            .map_err(|_| "invalid base64 picture key")?;
+        if size != out.len() {
+            return Err("picture key parse invalid size");
+        }
+        Ok(Self(out))
+    }
+}