Store profile usernames in lowercase for speedup

src/cache.nim

@@ -17,6 +17,8 @@ withDb:
   Video.title.safeAddColumn
   Video.description.safeAddColumn
 
+  safeAddColumn Profile.lowername
+
 var profileCacheTime = initDuration(minutes=10)
 
 proc isOutdated*(profile: Profile): bool =
@@ -25,7 +27,7 @@ proc isOutdated*(profile: Profile): bool =
 proc cache*(profile: var Profile) =
   withDb:
     try:
-      let p = Profile.getOne("lower(username) = ?", toLower(profile.username))
+      let p = Profile.getOne("lowername = ?", profile.lowername)
       profile.id = p.id
       profile.update()
     except KeyError:
@@ -35,7 +37,7 @@ proc cache*(profile: var Profile) =
 proc hasCachedProfile*(username: string): Option[Profile] =
   withDb:
     try:
-      let p = Profile.getOne("lower(username) = ?", toLower(username))
+      let p = Profile.getOne("lowername = ?", toLower(username))
       doAssert not p.isOutdated
       result = some p
     except AssertionError, KeyError:
@@ -45,7 +47,7 @@ proc getCachedProfile*(username, agent: string;
                        force=false): Future[Profile] {.async.} =
   withDb:
     try:
-      result.getOne("lower(username) = ?", toLower(username))
+      result.getOne("lowername = ?", toLower(username))
       doAssert not result.isOutdated
     except AssertionError, KeyError:
       result = await getProfileFull(username, agent)

src/parser.nim

@@ -7,9 +7,11 @@ proc parseTimelineProfile*(node: XmlNode): Profile =
   if profile == nil: return
 
   let pre = ".ProfileHeaderCard-"
+  let username = profile.getUsername(pre & "screenname")
   result = Profile(
     fullname:  profile.getName(pre & "nameLink"),
-    username:  profile.getUsername(pre & "screenname"),
+    username:  username,
+    lowername: toLower(username),
     joinDate:  profile.getDate(pre & "joinDateText"),
     website:   profile.selectAttr(pre & "urlText a", "title"),
     bio:       profile.getBio(pre & "bio"),
@@ -27,9 +29,11 @@ proc parsePopupProfile*(node: XmlNode; selector=".profile-card"): Profile =
   let profile = node.select(selector)
   if profile == nil: return
 
+  let username = profile.getUsername(".username")
   result = Profile(
     fullname:  profile.getName(".fullname"),
-    username:  profile.getUsername(".username"),
+    username:  username,
+    lowername: toLower(username),
     bio:       profile.getBio(".bio", fallback=".ProfileCard-bio"),
     userpic:   profile.getAvatar(".ProfileCard-avatarImage"),
     verified:  isVerified(profile),

src/prefs.nim

@@ -15,10 +15,10 @@ withDb:
     createTables()
   except DbError:
     discard
-  Prefs.theme.safeAddColumn
-  Prefs.hidePins.safeAddColumn
-  Prefs.hideReplies.safeAddColumn
-  Prefs.infiniteScroll.safeAddColumn
+  safeAddColumn Prefs.theme
+  safeAddColumn Prefs.hidePins
+  safeAddColumn Prefs.hideReplies
+  safeAddColumn Prefs.infiniteScroll
 
 proc getDefaultPrefs(cfg: Config): Prefs =
   result = genDefaultPrefs()

src/types.nim

@@ -12,6 +12,7 @@ dbTypes:
     Profile* = object
       username*: string
       fullname*: string
+      lowername*: string
       location*: string
       website*: string
       bio*: string