Priority level internal handling

Handle internally as ints, then translate as appropriate in outputs

userspace/digwatch/lua/compiler.lua

@@ -160,7 +160,7 @@ local function normalize_level(level)
    level = string.lower(level)
    for i,v in ipairs(valid_levels) do
       if (string.find(v, "^"..level)) then
-	 return v
+	 return i - 1 -- (syslog levels start at 0, lua indices start at 1)
       end
    end
    error("Invalid severity level: "..level)

userspace/digwatch/lua/output.lua

@@ -1,17 +1,22 @@
 local mod = {}
 
+levels = {"Emergency", "Alert", "Critical", "Error", "Warning", "Notice", "Informational", "Debug"}
+
 function mod.stdout(evt, level, format)
-   format = "%evt.time: "..level.." "..format
+   format = "%evt.time: "..levels[level+1].." "..format
    formatter = digwatch.formatter(format)
    msg = digwatch.format_event(evt, formatter)
    print (msg)
 end
 
 function mod.syslog(evt, level, format)
+   -- https://neopallium.github.io/nixio/modules/nixio.html#nixio.syslog
+   levels = {"emerg", "alert", "crit", "err", "warning", "notice", "info", "debug"}
+
    nixio = require("nixio")
    formatter = digwatch.formatter(format)
    msg = digwatch.format_event(evt, formatter)
-   nixio.syslog(level, msg)
+   nixio.syslog(levels[level+1], msg)
 end
 
 return mod