Implement logging/formatting

src/modules/blog.nim

@@ -1,6 +1,7 @@
 import prologue
 import prologue/middlewares/staticfile
 import views
+import formatter
 
 proc runWebsite(settings: Table[string, bool], dbSettings: Table[string, string]) =
   let prologueSettings = newSettings(
@@ -13,6 +14,7 @@ proc runWebsite(settings: Table[string, bool], dbSettings: Table[string, string]
   website.get("/about", getAbout)
   website.use(staticFileMiddleware("static"))
 
+  logPrint("Press Ctrl-C to stop site", "Info")
   website.run()
 
 export runWebsite

src/modules/db.nim

@@ -1,5 +1,6 @@
 import tables
 import std/[os, db_sqlite, strutils, streams]
+import formatter
 
 proc createDb(dbSettings: Table): bool =
   if not fileExists(dbSettings["path"]):
@@ -25,7 +26,7 @@ proc createDb(dbSettings: Table): bool =
       if command == "\c\n" or command == "\n":
         continue
       db.exec(sql(command.strip))
-      echo "Ran command: " & command.strip
+      logPrint("Ran SQL command from schema", "Info")
     db.close()
   return true
 

src/modules/formatter.nim

@@ -0,0 +1,52 @@
+import tables
+import strutils
+import math
+
+proc colorEsc(color: string): string {.gcsafe.} =
+  # Stored in proc to be gcsafe
+  let colors = {
+    "black": 30,
+    "red": 31,
+    "green": 32,
+    "orange": 33,
+    "blue": 34,
+    "purple": 35,
+    "cyan": 36,
+    "reset": 0
+  }.toTable()
+
+  return "\e[" & intToStr(colors[color]) & "m"
+
+proc colorize(text: string, color: string): string {.gcsafe.} =
+  return colorEsc(color) & text & colorEsc("reset")
+
+proc strCenter(text: string, filler: string = "-", length: int = 10): string {.gcsafe.} =
+  # Simply truncate and return if it fills the entire length
+  if text.len() > length:
+    return text[0..length-1]
+
+  # Find remaining characters and how much to pad each side
+  var remainHalf: float = (length - text.len()) / 2
+  var remainLeft: int = remainHalf.floor().int
+  var remainRight: int = remainHalf.ceil().int
+
+  return filler.repeat(remainLeft) & text & filler.repeat(remainRight)
+
+proc logFormat(text: string, level: string = "undef"): string {.gcsafe.} =
+  # Stored in proc to be gcsafe
+  let colorMapping = {
+    "Main": "green",
+    "Error": "red",
+    "Info": "purple",
+    "Warning": "orange",
+    "undef": "cyan"
+  }.toTable()
+
+  var prefix = "[" & colorize(text=strCenter(level), color=colorMapping[level]) & "]"
+  return prefix & " " & text
+
+proc logPrint(text: string = "Undefined error message", level: string = "undef") {.gcsafe.} =
+  # In separate function in case I need to for example also write it to a file in the future.
+  echo logFormat(text=text, level=level)
+
+export logPrint

src/modules/views.nim

@@ -1,7 +1,9 @@
 import prologue
 import nimja/parser
+import formatter
 
 proc renderTemplate(templateName: static[string]): string =
+  logPrint("Served template " & templateName, "Main")
   compileTemplateFile(getScriptDir() & "/templates/" & templateName)
 
 proc getIndex*(ctx: Context) {.async.} =

src/nimblog.nim

@@ -1,7 +1,7 @@
 when isMainModule:
   import tables
   import os
-  import modules/[blog, env, db]
+  import modules/[blog, env, db, formatter]
 
   let dataDir: string = "data"
 
@@ -10,21 +10,25 @@ when isMainModule:
     "logging": boolEnvOrDefault("NIMBLOG_LOG", true)
   }.toTable()
 
+  if settings["debug"]:
+    logPrint("Debug mode is enabled", "Warning")
+
   let dbSettings = {
     "path": dataDir & "/" & "blog.db",
     "schema_path": "schema.sql"
   }.toTable()
 
+  logPrint("Starting website", "Main")
+
   if not dirExists(dataDir):
-    echo "Created data directory"
+    logPrint("Created data directory", "Info")
     createDir(dataDir)
 
   if not createDb(dbSettings):
-    echo "Failed to prepare database"
+    logPrint("Failed to prepare database", "Error")
     quit(QuitFailure)
 
   try:
-    echo "Starting website"
     runWebsite(settings=settings, dbSettings=dbSettings)
   except:
-    echo "Could not run website"
+    logPrint("Could not run website", "Error")