From d46183860c1f3f10095e95023adcb79b1896ab0e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Hugo=20H=C3=B6rnquist?= <hugo@lysator.liu.se>
Date: Fri, 22 Mar 2019 20:11:11 +0100
Subject: Move C and Scheme code into subdirs.

---
 module/vcalendar.scm | 112 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 112 insertions(+)
 create mode 100644 module/vcalendar.scm

(limited to 'module/vcalendar.scm')

diff --git a/module/vcalendar.scm b/module/vcalendar.scm
new file mode 100644
index 00000000..3f7ba6ba
--- /dev/null
+++ b/module/vcalendar.scm
@@ -0,0 +1,112 @@
+(define-module (vcalendar)
+  #:use-module (vcalendar primitive)
+  #:use-module (vcalendar datetime)
+  #:use-module (vcalendar recur)
+  #:use-module (srfi srfi-1)
+  #:use-module (srfi srfi-26)
+  #:use-module (util)
+  #:re-export (repeating?))
+
+(define (parse-dates! cal)
+  "Parse all start times into scheme date objects."
+  (for-each-in (children cal 'VEVENT)
+               (lambda (ev)
+                 (mod! (attr ev "DTSTART") parse-datetime)
+                 (mod! (attr ev "DTEND")   parse-datetime)))
+  cal)
+
+
+(define-public (type-filter t lst)
+  (filter (lambda (e) (eqv? t (type e)))
+          lst))
+
+(define* (children component #:optional only-type)
+  (let ((childs (%vcomponent-children component)))
+    (if only-type
+        (type-filter only-type childs)
+        childs)))
+(export children)
+
+(define (set-attr! component attr value)
+  (%vcomponent-set-attribute!
+   component
+   (if (symbol? attr) (symbol->string attr) attr)
+   value))
+
+(define (get-attr component attr)
+  (%vcomponent-get-attribute
+   component
+   (if (symbol? attr) (symbol->string attr) attr)))
+
+;; Enables symmetric get and set:
+;; (set! (attr ev "KEY") 10)
+(define-public attr (make-procedure-with-setter get-attr set-attr!))
+
+(define-public type %vcomponent-type)
+(define-public parent %vcomponent-parent)
+(define-public push-child! %vcomponent-push-child!)
+(define-public (attributes component) (map string->symbol (%vcomponent-attribute-list component)))
+
+(define-public copy-vcomponent %vcomponent-shallow-copy)
+
+(define-public filter-children! %vcomponent-filter-children!)
+
+(define-public (search cal term)
+  (cdr (let ((events (filter (lambda (ev) (eq? 'VEVENT (type ev)))
+                             (children cal))))
+         (find (lambda (ev) (string-contains-ci (car ev) term))
+               (map cons (map (cut get-attr <> "SUMMARY")
+                              events)
+                    events)))))
+
+(define-public (extract field)
+  (cut get-attr <> field))
+
+(define-public (key=? k1 k2)
+  (eq?
+   (if (string? k1) (string->symbol k1) k1)
+   (if (string? k2) (string->symbol k2) k2)))
+
+(define-public (make-vcomponent path)
+  (let* ((root (%vcomponent-make path))
+         (component
+          (parse-dates!
+           (case (string->symbol (or (attr root "TYPE") "no-type"))
+             ;; == Single ICS file ==
+             ;; Remove the abstract ROOT component,
+             ;; returning the wanted VCALENDAR component
+             ((file)
+              (car (%vcomponent-children root)))
+
+             ;; == Assume vdir ==
+             ;; Also removes the abstract ROOT component, but also
+             ;; merges all VCALENDAR's children into the first
+             ;; VCALENDAR, and return that VCALENDAR.
+             ;;
+             ;; TODO the other VCALENDAR components might not get thrown away,
+             ;; this since I protect them from the GC in the C code.
+             ((vdir)
+              (reduce (lambda (cal accum)
+                        (for-each (lambda (component)
+                                    (case (type component)
+                                      ((VTIMEZONE)
+                                       (let ((zones (children cal 'VTIMEZONE)))
+                                         (unless (find (lambda (z)
+                                                         (string=? (attr z "TZID")
+                                                                   (attr component "TZID")))
+                                                       zones)
+                                           (%vcomponent-push-child! accum component))))
+                                      (else (%vcomponent-push-child! accum component))))
+                                  (%vcomponent-children cal))
+                        accum)
+                      '() (%vcomponent-children root)))
+
+             ((no-type) (throw 'no-type))
+
+             (else (throw 'something))))))
+
+    (set! (attr component "NAME")
+          (attr root      "NAME"))
+    (set! (attr component "COLOR")
+          (attr root      "COLOR"))
+    component))
-- 
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