Forget-Me-Not/helpers/global.nim

#[Copyright 2025 ITwrx.
This file is part of Forget-Me-Not.
Forget-Me-Not is released under the GNU Affero General Public License 3.0.
See COPYING or <https://www.gnu.org/licenses/> for details.]#

import std/[times, strutils, re, uri, paths, random, strtabs]

#universal
const APP_PATH* = "/var/www/forget-me-not-gs"
const ASSETS_PATH* = "/var/www/forget-me-not-gs/assets"
const APP_NAME* = "Forget-Me-Not"
#set to 'dev' or 'prod'. changes how cookies are created and possibly paths, if using two environments. Maybe other stuff i'm forgetting.
const APP_MODE* = "dev"
#dev
#using paths config'd in /etc/hosts for local dev.
const APP_URL* = "http://fmn-gs"
const ASSETS_URL* = "http://assets.fmn-gs"
#prod
#const APP_URL* = "https://my-fmn-url.com"
#const ASSETS_URL* = "https://assets.my-fmn-url.com"

var frStrTab* = newStringTable()

#TODO: implement logging or remove logging code. Remove SSM code not used in FMN.

#Guildensterns logger is conflicting with my, evidently incorrect, usage of the std lib logger so i'll just write some lines to a file for now.
#var logger* = newFileLogger("errors.log")
    
let dt = now()
let nowDT* = dt.format("M-d-YYYY h:mm:ss tt")

proc writeLogLine*(errorMsg: string) =
  {.gcsafe.}:
    let logFile = open("errors.log", fmAppend)
    defer: logFile.close()
    logFile.writeLine(errorMsg)

template location*(slug: string): untyped =
  "location: " & APP_URL & slug

template locationBack*(): string =
  "location: " & http.headers.getOrDefault("referer")
  
template locationOrigin*(origin: string): untyped =
  "location: " & origin
  
proc filenameToSentence*(filename: string): string =
  #remove file extension.
  let filePath = Path filename
  let filePathEnum = splitFile(filePath)
  var name = filePathEnum[1].string
  #replace dashes and underscores with spaces.
  name = name.replace(re"_", " ")
  name = name.replace(re"-", " ")
  #strip numbers.
  name = name.replace(re"[0-9]", "")
  return name

proc titleToSlug*(title: string): string =
  #replace one or more spaces with dash
  var dataString = title.replace(re" +", "-")
  #replace anything that is not a letter, number or underscore with nothing.
  dataString = dataString.replace(re"[^a-zA-Z0-9-]", "")
  #convert to all lowercase.
  dataString = dataString.toLowerAscii()
  return dataString

proc getIdFromURI*(uri: string): int =
  #let parsedUri = parseUri(uri)
  let pathSeq = parseUri(uri).path.split('/')
  result = strutils.parseInt(pathSeq[2])
  
proc parseIntIf*(input: string): int =
  if input.len > 0:
    return parseInt(input)
  else:
    return 0
  
proc parseFloatIf*(input: string): float =
  if input.len > 0:
    return parseFloat(input)
  else:
    return 0.0

#not cryptographically secure.
proc rndStr20*(): string =
  for _ in 0..20:
    add(result, char(rand(int('A') .. int('z'))))
    
proc boolToInt*(myBool: bool): int =
  if myBool == true:
    return 1
  else:
    return 0