feat(cache): Add error logs

Author: Fuwn

src/cache.gleam

@@ -5,6 +5,7 @@ import gleam/option.{type Option}
 import gleam/result
 import image
 import simplifile
+import wisp
 
 pub type CachedImage {
   CachedImage(data: BitArray, info: image.ImageInformation)
@@ -17,7 +18,11 @@ pub fn load_themes() {
   list.fold(
     case simplifile.read_directory("./themes") {
       Ok(files) -> files
-      Error(_) -> []
+      Error(_) -> {
+        wisp.log_error("Error reading themes directory")
+
+        []
+      }
     },
     dict.new(),
     fn(accumulated_themes, theme) {
@@ -26,19 +31,18 @@ pub fn load_themes() {
         theme,
         list.range(0, 9)
           |> list.fold(dict.new(), fn(accumulated_digits, digit) {
-            case
-              simplifile.read_bits(
-                from: "./themes/"
-                <> theme
-                <> "/"
-                <> int.to_string(digit)
-                <> "."
-                <> case theme {
-                  "gelbooru-h" | "moebooru-h" | "lain" | "garukura" -> "png"
-                  _ -> "gif"
-                },
-              )
-            {
+            let path =
+              "./themes/"
+              <> theme
+              <> "/"
+              <> int.to_string(digit)
+              <> "."
+              <> case theme {
+                "gelbooru-h" | "moebooru-h" | "lain" | "garukura" -> "png"
+                _ -> "gif"
+              }
+
+            case simplifile.read_bits(from: path) {
               Ok(image_data) -> {
                 case image.get_image_information(image_data) {
                   Ok(info) ->
@@ -47,10 +51,20 @@ pub fn load_themes() {
                       digit,
                       CachedImage(data: image_data, info: info),
                     )
-                  Error(_) -> accumulated_digits
+                  Error(_) -> {
+                    wisp.log_error(
+                      "Error getting image information for " <> path,
+                    )
+
+                    accumulated_digits
+                  }
                 }
               }
-              Error(_) -> accumulated_digits
+              Error(_) -> {
+                wisp.log_error("Error reading image file " <> path)
+
+                accumulated_digits
+              }
             }
           }),
       )