small filter improvement

core.lua

@@ -1,5 +1,5 @@
 Aux = {
-    version = '2.14.2',
+    version = '2.14.3',
     blizzard_ui_shown = false,
 	orig = {},
 }

scan_util.lua

@@ -492,6 +492,9 @@ function m.filter_from_string(filter_term)
         elseif strfind(str, '^%d*:%d*$') then
             if not blizzard_filter.first_page and not blizzard_filter.last_page then
                 local _, _, first_page, last_page = strfind(str, '^(%d*):(%d*)$')
+                if tonumber(first_page) and tonumber(first_page) < 1 or tonumber(last_page) and tonumber(last_page) < 1 then
+                    return false, {}, 'Erroneous page range modifier'
+                end
                 blizzard_filter.first_page = tonumber(first_page)
                 blizzard_filter.last_page = tonumber(last_page)
                 prettified:append(Aux.gui.inline_color({216, 225, 211, 1})..str..'|r')
@@ -499,6 +502,9 @@ function m.filter_from_string(filter_term)
                 return false, {}, 'Erroneous page range modifier'
             end
         elseif tonumber(str) then
+            if tonumber(str) < 1 or tonumber(str) > 60 then
+                return false, {}, 'Erroneous level range modifier'
+            end
             if not blizzard_filter.min_level then
                 blizzard_filter.min_level = tonumber(str)
                 prettified:append(Aux.gui.inline_color({216, 225, 211, 1})..str..'|r')

search_frame.lua

@@ -153,11 +153,11 @@ function private.get_form_filter()
     end
 
     if tonumber(AuxSearchFrameFilterMinLevel:GetText()) then
-        add(tonumber(AuxSearchFrameFilterMinLevel:GetText()))
+        add(max(1, min(60, tonumber(AuxSearchFrameFilterMinLevel:GetText()))))
     end
 
     if tonumber(AuxSearchFrameFilterMaxLevel:GetText()) then
-        add(tonumber(AuxSearchFrameFilterMaxLevel:GetText()))
+        add(max(1, min(60, tonumber(AuxSearchFrameFilterMaxLevel:GetText()))))
     end
 
     if AuxSearchFrameFilterUsableCheckButton:GetChecked() then
@@ -184,8 +184,11 @@ function private.get_form_filter()
         add(strlower(getglobal('ITEM_QUALITY'..quality..'_DESC')))
     end
 
-    if tonumber(private.first_page_editbox:GetText()) or tonumber(private.last_page_editbox:GetText()) then
-        add((tonumber(private.first_page_editbox:GetText()) or '') .. ':' .. (tonumber(private.last_page_editbox:GetText()) or ''))
+    local first_page, last_page = tonumber(private.first_page_editbox:GetText()), tonumber(private.last_page_editbox:GetText())
+    first_page = first_page and max(1, first_page)
+    last_page = last_page and max(1, last_page)
+    if first_page or last_page then
+        add((first_page or '') .. ':' .. (last_page or ''))
     end
 
     return filter_term