Add preliminary ical experiments

This patch adds preliminary 'support' for iCalendar. Preliminary in the
sense that it opens a known file, and prints some output using printf.

This is just some experiments in parsing ics files.

Signed-off-by: Olliver Schinagl <oliver@schinagl.nl>

5 files changed, 140 insertions, 1 deletions

diff --git a/configure.ac b/configure.ac
index 6b67627..ebbe6c0 100644
--- a/configure.ac
+++ b/configure.ac
@@ -116,6 +116,7 @@ src/Makefile
 src/bin/Makefile
 src/include/Makefile
 src/lib/Makefile
+src/plugins/Makefile
 src/tests/Makefile
 doc/engagement.1
 ])
diff --git a/po/POTFILES.in b/po/POTFILES.in
index 7269d3e..9070164 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -1,3 +1,4 @@
 src/bin/engagement.c
 src/bin/engagement_private.h
 src/lib/plugin.c
+src/plugins/calendar_ical.c
diff --git a/src/Makefile.am b/src/Makefile.am
index b52407c..9b10f93 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -1,4 +1,4 @@
 MAINTAINERCLEANFILES = Makefile.in
 
-SUBDIRS = include lib bin tests
+SUBDIRS = include lib plugins bin tests
 
diff --git a/src/plugins/Makefile.am b/src/plugins/Makefile.am
new file mode 100644
index 0000000..b5e5002
--- /dev/null
+++ b/src/plugins/Makefile.am
@@ -0,0 +1,20 @@
+MAINTAINERCLEANFILES = Makefile.in
+
+AM_CPPFLAGS = \
+-I$(top_srcdir)/src/plugins \
+-I$(top_builddir)/src/plugins \
+-I$(top_srcdir)/src/include \
+-DPACKAGE_LIB_DIR=\"$(libdir)\" \
+-DPACKAGE_DATA_DIR=\"$(datadir)/$(PACKAGE)\"
+
+lib_LTLIBRARIES = libcalendar_example.la \
+		  libcalendar_ical.la libcalendar_caldav.la
+
+libcalendar_example_la_SOURCES = calendar_example.c
+libcalendar_example_la_LIBADD =
+
+libcalendar_ical_la_SOURCES = calendar_ical.c
+libcalendar_ical_la_LIBADD = @LIBICAL@
+
+libcalendar_caldav_la_SOURCES = calendar_caldav.c
+libcalendar_caldav_la_LIBADD = -lical # @LIBICAL@
diff --git a/src/plugins/calendar_ical.c b/src/plugins/calendar_ical.c
new file mode 100644
index 0000000..58abb36
--- /dev/null
+++ b/src/plugins/calendar_ical.c
@@ -0,0 +1,117 @@
+/*
+ * (c) Copyright 2016 Olliver Schinagl
+ * Author: Olliver Schinagl <oliver@schinagl.nl>
+ *
+ * SPDX-License-Identifier:	AGPL-3.0+
+ */
+
+#include <engagement/plugin.h>
+#include <libical/ical.h>
+#include <libintl.h>
+#include <stdio.h>
+
+#include "gettext.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+char *line_gen_func(char *str, size_t size, void *data)
+{
+    return fgets(str, (int)size, (FILE *)data);
+}
+
+bool ical_load(void)
+{
+	icalparser *parser;
+	icalcomponent *comp, *cal, *event;
+	FILE *stream;
+
+	printf("Plugin loaded\n");
+
+	stream = fopen("test-data/large.ics", "r");
+	if (stream == NULL) {
+		fprintf(stderr, "Cannot open file for reading");
+		return 1;
+	}
+	parser = icalparser_new();
+	icalparser_set_gen_data(parser, stream);
+	comp = icalparser_parse(parser, line_gen_func);
+
+	for (event = icalcomponent_get_first_real_component(comp);
+	     event != NULL;
+	     event = icalcomponent_get_next_component(comp, ICAL_ANY_COMPONENT)) {
+		icalproperty *prop;
+
+		printf("\n---Event---\n%s", icalcomponent_as_ical_string(event));
+		for (prop = icalcomponent_get_first_property(event, ICAL_ANY_PROPERTY);
+		     prop != NULL;
+		     prop = icalcomponent_get_next_property(event, ICAL_ANY_PROPERTY)) {
+			icalparameter *param;
+
+			printf("prop: %s %d (%s) %s\n", icalproperty_as_ical_string(prop), icalproperty_count_parameters(prop), icalproperty_get_property_name(prop), icalvalue_as_ical_string(icalproperty_get_value(prop)));
+			for (param = icalproperty_get_first_parameter(prop, ICAL_ANY_PARAMETER);
+			     param != NULL;
+			     param = icalproperty_get_next_parameter(prop, ICAL_ANY_PARAMETER)) {
+				printf("param: %s\n", icalparameter_as_ical_string(param));
+			}
+			if (icalerrno != ICAL_NO_ERROR)
+				fprintf(stderr, "Error with parameter %s\n", icalerror_strerror(icalerrno));
+		}
+		if (icalerrno != ICAL_NO_ERROR)
+			fprintf(stderr, "Error with property %s\n", icalerror_strerror(icalerrno));
+	}
+	if (icalerrno != ICAL_NO_ERROR)
+		fprintf(stderr, "Error with component. %s\n", icalerror_strerror(icalerrno));
+
+	icalparser_free(parser);
+	fclose(stream);
+
+	return true;
+}
+
+bool ical_unload(void)
+{
+	printf("Plugin unloaded\n");
+	return true;
+}
+
+struct plugin calendar_plugin = {
+	.magic = PLUGIN_MAGIC,
+	.type = PLUGIN_TYPE_CALENDAR,
+	.id = "connector-ical",
+	.version = {
+		.major = PLUGIN_VERSION_MAJOR,
+		.minor = PLUGIN_VERSION_MINOR,
+		.micro = 1,
+	},
+	.info = {
+		.name = N_("Caldav connector plugin"),
+		.summary = N_("Caldav connector plugin summary"),
+		.description = N_("Caldav connector plugin description"),
+		.help = N_("Caldav connector plugin help text"),
+		.author = N_("Olliver Schinagl"),
+		.email = "oliver@schinagl.nl",
+		.url = "http://git.schinagl.nl/engagement.git",
+	},
+	.load = &ical_load,
+	.unload = &ical_unload,
+};
+
+void __attribute__((constructor)) ical_create(void)
+{
+	printf("Plugin created\n");
+	return;
+}
+
+void __attribute__((destructor)) ical_destroy(void)
+{
+	printf("Plugin destroyed\n");
+	return;
+}
+
+PLUGIN_INIT(ical_plugin);
+
+#ifdef __cplusplus
+}
+#endif