;;
;; configuraiton.scm
;;
;; Configuration parameters used by various modules.
;;
;; ISC License
;;
;; Copyright 2023 Brmlab, z.s.
;; Dominik Pantůček <dominik.pantucek@trustica.cz>
;;
;; Permission to use, copy, modify, and/or distribute this software
;; for any purpose with or without fee is hereby granted, provided
;; that the above copyright notice and this permission notice appear
;; in all copies.
;; 
;; THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
;; WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
;; WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
;; AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR
;; CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
;; OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
;; NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
;; CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
;;

(declare (unit configuration))

(module
 configuration
 (
  *etc-hackerbase*
  
  *members-directory*
  *apikeys-file*
  *checked-file*
  *bank-dir*
  *email-from*
  *summary-mailto*
  *doku-base*
  *mailman2-bin*
  *mailman-version*
  *mailman3-bin*
  *mailman3-sql*
  *mailman3-sql-path*
  
  load-configuration!
  )

 (import scheme
	 (chicken base)
	 (chicken time)
	 (chicken time posix)
	 (chicken file)
	 (chicken io)
	 (chicken process-context)
	 (chicken pathname)
	 util-parser)

 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ;; Initial configuration from *etc-hackerbase*

 ;; Where to load initial configuration from
 (define *etc-hackerbase* (make-parameter
			   (list "/etc/hackerbase"
				 (make-pathname
				  (get-environment-variable "HOME")
				  ".hackerbaserc"))))

 ;; Needed by multiple modules actually
 (define *members-directory* (make-parameter #f))
 (define =members-directory= "members")

 ;; List of bank accounts and Fio API keys (no support for other banks now)
 (define *apikeys-file* (make-parameter #f))
 (define =apikeys-file= "apikey.ntlm")

 ;; Old last checket transaction id support
 (define *checked-file* (make-parameter #f))
 (define =checked-file= "checked.ntlm")

 ;; Where are the bank CSV files
 (define *bank-dir* (make-parameter #f))

 ;; From address for emails
 (define *email-from* (make-parameter #f))
 (define =email-from= "Brmlab - Rada <rada@brmlab.cz>")

 ;; Summary email address
 (define *summary-mailto* (make-parameter #f))
 (define =summary-mailto= "rada@brmlab.cz")

 ;; DokuWiki base dir
 (define *doku-base* (make-parameter #f))
 (define =doku-base= "/var/www")

 ;; Where does the mailman binaries reside
 (define *mailman2-bin* (make-parameter #f))
 (define =mailman2-bin= "/usr/lib/mailman/bin")

 ;; Which version of mailman to use
 (define *mailman-version* (make-parameter #f))
 (define =mailman-version= 2)

 ;; What is the mailman 3 command
 (define *mailman3-bin* (make-parameter #f))
 ;; The default value requires the following sudoers line:
 ;; %hackerbase ALL=(list) NOPASSWD:/usr/lib/mailman3/bin/mailman
 (define =mailman3-bin= "sudo -u list /usr/lib/mailman3/bin/mailman")

 ;; A string is the default, gets converted to boolean at the end of
 ;; loading configuration
 (define *mailman3-sql* (make-parameter #f))
 (define =mailman3-sql= "0")

 ;; The path to SQLite3 DB file
 (define *mailman3-sql-path* (make-parameter #f))
 (define =mailman3-sql-path= "mailman.db")

 (define (load-single-configuration! fname)
   (when (file-exists? fname)
     (let loop ((lines (read-lines (open-input-file fname))))
       (when (not (null? lines))
	 (let* ((line (car lines))
		(kv (parser-parse-line
		     (parser-preprocess-line line))))
	   (when (pair? kv)
	     (let ((k (car kv))
		   (v (cdr kv)))
	       (case k
		 ((members-directory)
		  (when (not (*members-directory*))
		    (*members-directory* v)))
		 ((apikeys-file)
		  (when (not (*apikeys-file*))
		    (*apikeys-file* v)))
		 ((checked-file)
		  (when (not (*checked-file*))
		    (*checked-file* v)))
		 ((bank-dir)
		  (when (not (*bank-dir*))
		    (*bank-dir* v)))
		 ((email-from)
		  (when (not (*email-from*))
		    (*email-from* v)))
		 ((summary-mailto)
		  (when (not (*summary-mailto*))
		    (*summary-mailto* v)))
		 ((dokuwiki)
		  (when (not (*doku-base*))
		    (*doku-base* v)))
		 ((mailman2)
		  (when (not (*mailman2-bin*))
		    (*mailman2-bin* v)))
		 ((mailman-version)
		  (when (not (*mailman-version*))
		    (*mailman-version* (string->number v))))
		 ((mailman3)
		  (when (not (*mailman3-bin*))
		    (*mailman3-bin* v)))
		 ((mailman3-sql)
		  ;; Gets to be string? - convert to boolean at the
		  ;; end of loading!
		  (when (not (*mailman3-sql*))
		    (*mailman3-sql* v)))
		 ((mailman3-sql-path)
		  (when (not (*mailman3-sql-path*))
		    (*mailman3-sql-path* v)))
		 )))
	   (loop (cdr lines)))))))

 ;; Loads the configuration file and possibly changes the default
 ;; parameters.
 (define (load-configuration!)
   (let ((fnames (*etc-hackerbase*)))
     (if (string? fnames)
	 (load-single-configuration! fnames)
	 (let loop ((fnames fnames))
	   (when (not (null? fnames))
	     (load-single-configuration! (car fnames))
	     (loop (cdr fnames))))))
   (when (not (*members-directory*))
     (*members-directory* =members-directory=))
   (when (not (*apikeys-file*))
     (*apikeys-file* =apikeys-file=))
   (when (not (*checked-file*))
     (*checked-file* =checked-file=))
   ;; No bank-dir - #f default
   (when (not (*email-from*))
     (*email-from* =email-from=))
   (when (not (*summary-mailto*))
     (*summary-mailto* =summary-mailto=))
   (when (not (*doku-base*))
     (*doku-base* =doku-base=))
   (when (not (*mailman2-bin*))
     (*mailman2-bin* =mailman2-bin=))
   (when (not (*mailman-version*))
     (*mailman-version* =mailman-version=))
   (when (not (*mailman3-bin*))
     (*mailman3-bin* =mailman3-bin=))
   (when (not (*mailman3-sql*))
     (*mailman3-sql* =mailman3-sql=))
   (*mailman3-sql* (not (equal? (*mailman3-sql*) "0")))
   (when (not (*mailman3-sql-path*))
     (*mailman3-sql-path* =mailman3-sql-path=)))

 )