done with functionality relating to performing file operations on terminal

fcore/file-string.sml

@@ -0,0 +1,59 @@
+structure FileString =
+struct
+  fun findLastChr (str, pos, findChr) =
+    if pos < 0 then ~1
+    else if String.sub (str, pos) = findChr then pos
+    else findLastChr (str, pos - 1, findChr)
+
+  fun extractFileName str =
+    let
+      val lastSlash = findLastChr (str, String.size str - 1, #"/")
+      val strStart = lastSlash + 1
+    in
+      if lastSlash = ~1 then str
+      else String.substring (str, strStart, String.size str - strStart)
+    end
+
+  fun removeFileExtension str =
+    let val lastDot = findLastChr (str, String.size str - 1, #".")
+    in if lastDot = ~1 then str else String.substring (str, 0, lastDot)
+    end
+
+  local
+    fun finish acc =
+      let val acc = List.rev acc
+      in String.implode acc
+      end
+
+    (* convert from kebab-case or snake_case to PascalCase *)
+    fun loop (#"-" :: chr :: tl, acc) =
+          let val acc = Char.toUpper chr :: acc
+          in loop (tl, acc)
+          end
+      | loop (#"_" :: chr :: tl, acc) =
+          let val acc = Char.toUpper chr :: acc
+          in loop (tl, acc)
+          end
+      | loop ([#"-"], acc) = finish acc
+      | loop ([#"_"], acc) = finish acc
+      | loop (chr :: tl, acc) =
+          loop (tl, chr :: acc)
+      | loop ([], acc) = finish acc
+  in
+    fun filenameToStructureName str =
+      let
+        val str = removeFileExtension str
+        val str = extractFileName str
+      in
+        (* capitalise first character in string *)
+        case String.explode str of
+          chr :: tl => let val chr = Char.toUpper chr in loop (tl, [chr]) end
+        | [] => ""
+      end
+  end
+
+  fun getCollisionFilename str =
+    let val str = removeFileExtension str
+    in str ^ "-collisions.sml"
+    end
+end