Add link replacements for Medium and Imgur

src/formatters.nim

@@ -20,6 +20,10 @@ let
   # so v.redd.it links will not be replaced.
   # Images aren't supported due to errors from Teddit when the image
   # wasn't first displayed via a post on the Teddit instance.
+
+  imgurRegex = re"((i|i.stack)\.)?imgur\.(com|io)"
+
+  mediumRegex = re"([a-zA-Z0-9_.-]+\.)?medium\.com"
 
   wwwRegex = re"https?://(www[0-9]?\.)?"
   m3u8Regex = re"""url="(.+.m3u8)""""
@@ -68,6 +72,12 @@ proc replaceUrls*(body: string; prefs: Prefs; absolute=""): string =
     result = result.replace(rdRegex, prefs.replaceReddit)
     if prefs.replaceReddit in result and "/gallery/" in result:
       result = result.replace("/gallery/", "/comments/")
+
+  if prefs.replaceImgur.len > 0 and "imgur" in result:
+    result = result.replace(imgurRegex, prefs.replaceImgur)
+
+  if prefs.replaceMedium.len > 0 and "medium.com" in result:
+    result = result.replace(mediumRegex, prefs.replaceMedium)
 
   if absolute.len > 0 and "href" in result:
     result = result.replace("href=\"/", &"href=\"{absolute}/")

src/prefs_impl.nim

@@ -106,6 +106,14 @@ genPrefs:
     replaceReddit(input, ""):
       "Reddit -> Teddit/Libreddit"
       placeholder: "Teddit hostname"
+
+    replaceImgur(input, ""):
+      "Imgur -> Rimgo"
+      placeholder: "Rimgo hostname"
+
+    replaceMedium(input, ""):
+      "Medium -> Scribe"
+      placeholder: "Scribe hostname"
 
 iterator allPrefs*(): Pref =
   for k, v in prefList: