From 194615aa1dceb912880cf51cf6ca1bbe0b53a22d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Dominik=20Pant=C5=AF=C4=8Dek?=
 <dominik.pantucek@trustica.cz>
Date: Fri, 10 Mar 2023 23:24:36 +0100
Subject: [PATCH] Start work on parsing member files, outline month support
 functions.

---
 brmsaptool.scm | 80 ++++++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 77 insertions(+), 3 deletions(-)

diff --git a/brmsaptool.scm b/brmsaptool.scm
index c7fe709..9b88a29 100644
--- a/brmsaptool.scm
+++ b/brmsaptool.scm
@@ -24,6 +24,8 @@
 	(chicken file)
 	(chicken pathname)
 	(chicken file posix)
+	(chicken io)
+	(chicken string)
 
 	(chicken process-context))
 
@@ -108,8 +110,40 @@
   (print " ok."))
 
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-;; Members index
+;; Months support
 
+(define (string->month s)
+  (list 2023 1))
+
+(define (month->string m)
+  "2023-01")
+
+(define (month=? m n)
+  #f)
+
+(define (month<? m n)
+  #f)
+
+(define (month-diff m n)
+  ; Inclusive?
+  1)
+
+(define (month-tests!)
+  (display "[test] month ")
+  ;; Parsing
+  ;; Formatting
+  ;; Comparison less
+  ;; Comparison equal
+  ;; Comparison greater
+  ;; Difference - TODO: inclusive both ends?
+  (print " ok."))
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; Members database
+
+
+;; Loads all symlinks from (*members-directory*) returning a list of
+;; pairs (name . destination)
 (define (load-members-raw-index)
   (let loop ((fns (directory (*members-directory*)))
 	     (rs '()))
@@ -123,7 +157,9 @@
 		    (cons (cons fn sl) rs)
 		    rs))))))
 
-(define (members-expand-raw-index ri)
+;; Converts the raw members index to a list of dictionaries with keys
+;; 'id, 'name and 'file. File names are without directory element.
+(define (expand-members-raw-index ri)
   (let loop ((ri ri)
 	     (ds '()))
     (if (null? ri)
@@ -141,6 +177,41 @@
 			    (cons 'file dfn))
 		      ds))))))
 
+;; Parses given key-value line. Key is up to first space, value is the
+;; rest of the line. If the line doesn't contain anything, returns #f.
+(define (parse-member-line l)
+  ;;(print 'pm)
+  ;;(print l)
+  (let ((sp (string-split l " ")))
+    (and sp
+	 (not (null? sp))
+	 (list (string->symbol (car sp))
+	       (string-intersperse (cdr sp))))))
+	   
+;; TODO: student and suspend special handling - should create list of
+;; (start date) (stop date) which will be later sorted by date and
+;; computation performed
+(define (parse-member-lines ls)
+  (let loop ((ls ls)
+	     (r (make-dict)))
+    ;;(print '---)
+    ;;(print r)
+    (if (null? ls)
+	r
+	(let ((p (parse-member-line (car ls))))
+	  ;;(print p)
+	  (loop (cdr ls)
+		(if p
+		    (apply dict-set r p)
+		    r))))))
+
+;; Loads lines from given file in (*members-directory*) and parses
+;; them.
+(define (load-member-file fn)
+  (let* ((ffn (make-pathname (*members-directory*) fn))
+	 (f (open-input-file ffn))
+	 (ls (read-lines f)))
+    (parse-member-lines ls)))
 
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ;; Run everything
@@ -152,8 +223,11 @@
 ;; Run tests
 (print "Running self-tests:")
 (dict-tests!)
+(month-tests!)
 (print "All self-tests ok!")
 (newline)
 
 ;; Perform requested action
-(print (members-expand-raw-index (load-members-raw-index)))
+;(print (expand-members-raw-index (load-members-raw-index)))
+
+(print (load-member-file "joe"))