Implement GeoJson loader

src/geojson.c

@@ -0,0 +1,119 @@
+#include "geojson.h"
+#include "dijkstrasearch.h"
+#include "logging.h"
+
+#include <stdlib.h>
+#include <glib-object.h>
+#include <json-glib/json-glib.h>
+
+int add_geojson_to_dijkstra(GList **nodes,
+			    GList **paths,
+			    char *filename)
+{
+	JsonParser *parser;
+	JsonNode *root;
+	JsonArray *arr;
+	JsonNode *node;
+	JsonReader *reader;
+	GError *error;
+
+	int i, j;
+	int i_max, j_max;
+
+	char *name = NULL;
+	int x, y;
+	int x_last, y_last;
+
+	struct _stats {
+		int nodes;
+		int paths;
+	} stats = {.nodes = 0, .paths = 0};
+
+	report(LL_INFO, "Loading GeoJson data from %s...", filename);
+
+	parser = json_parser_new ();
+
+	error = NULL;
+	json_parser_load_from_file(parser, filename, &error);
+	if (error)
+	{
+		report(LL_ERROR, "Unable to parse `%s': %s\n", filename, error->message);
+		g_error_free(error);
+		g_object_unref(parser);
+		return EXIT_FAILURE;
+	}
+
+	root = json_parser_get_root(parser);
+
+	arr = json_node_get_array(root);
+	if (arr) {
+		i_max = json_array_get_length(arr);
+		for (i = 0; i < i_max; i++)
+		{
+			node = json_array_get_element(arr, i);
+			if (node) {
+				reader = json_reader_new(node);
+
+				json_reader_read_member(reader, "properties");
+				if (json_reader_get_error(reader)) {
+					g_object_unref(reader);
+					continue;
+				}
+				json_reader_read_member(reader, "name");
+				name = strdup(json_reader_get_string_value(reader));
+				json_reader_end_member(reader); // name
+				json_reader_end_member(reader); // properties
+
+				json_reader_read_member(reader, "geometry");
+				json_reader_read_member(reader, "coordinates");
+				if (json_reader_is_array(reader)) {
+					j_max = json_reader_count_elements(reader);
+					for (j = 0; j < j_max; j++) {
+						json_reader_read_element(reader, j);
+						if (json_reader_is_array(reader)) {
+							stats.nodes++;
+							json_reader_read_element(reader, 0);
+							x = json_reader_get_int_value(reader);
+							json_reader_end_element(reader);
+							json_reader_read_element(reader, 1);
+							y = json_reader_get_int_value(reader);
+							json_reader_end_element(reader);
+
+							if (j > 0) {
+								stats.paths++;
+								dijkstra_path_new_to_list(nodes, paths,
+											  x_last, y_last,
+											  x, y,
+											  name, 1);
+							}
+
+							x_last = x;
+							y_last = y;
+						} else {
+							report(LL_WARNING, "err 1\n");
+						}
+						json_reader_end_element(reader);
+					}
+				} else {
+					report(LL_WARNING, "err 0\n");
+				}
+				json_reader_end_member(reader); // coordinates
+				json_reader_end_member(reader); // geometry
+
+				g_object_unref(reader);
+			} else {
+				report(LL_ERROR, "Invalid geojson file.\n");
+			}
+		}
+	} else {
+		report(LL_ERROR, "Invalid geojson file.\n");
+	}
+
+	report(LL_INFO, "Imported %d nodes and %d paths from GeoJson.",
+	       stats.nodes,
+	       stats.paths);
+
+	g_object_unref (parser);
+
+	return EXIT_SUCCESS;
+}

src/geojson.h

@@ -0,0 +1,10 @@
+#ifndef GEOJSON_H
+#define GEOJSON_H
+
+#include <glib.h>
+
+int add_geojson_to_dijkstra(GList **nodes,
+			    GList **paths,
+			    char *filename);
+
+#endif // GEOJSON_H

src/logging.c

@@ -0,0 +1,60 @@
+/* ----------------------------------------------------------------------------
+ *                                   C-Report
+ * ----------------------------------------------------------------------------
+ * Author          : Markus Koch <markus@notsyncing.net>
+ * Contributors    : None
+ * License         : Mozilla Public License (MPL) Version 2
+ * ----------------------------------------------------------------------------
+*/
+
+#include "logging.h"
+#include <stdio.h>
+#include <stdarg.h>
+#include <string.h>
+
+static enum log_level current_log_level = LL_INFO;
+
+static const char *ll_string[] = {
+	"\x1B[31m\x1B[1m[X] ",
+	"\x1B[31m[E] ",
+	"\x1B[33m[W] ",
+	"\x1B[32m[I] ",
+	"\x1B[34m[D] ",
+	"\x1B[34m[d] ",
+	"[?] "
+};
+
+int should_report(enum log_level log_level)
+{
+	return (log_level <= current_log_level);
+}
+
+enum log_level report(enum log_level log_level, const char *format, ...)
+{
+	va_list vargs;
+
+	if (log_level > LL_COUNT)
+		log_level = LL_COUNT;
+
+	if (should_report(log_level)) {
+		va_start(vargs, format);
+		fprintf(stderr, "%s", ll_string[log_level]);
+		vfprintf(stderr, format, vargs);
+		fprintf(stderr, "\x1B[0m\n");
+		va_end(vargs);
+	}
+
+	return log_level;
+}
+
+void set_log_level(enum log_level log_level)
+{
+	if (log_level >= LL_COUNT)
+		log_level = LL_COUNT - 1;
+	current_log_level = log_level;
+}
+
+enum log_level get_log_level()
+{
+	return current_log_level;
+}

src/logging.h

@@ -0,0 +1,28 @@
+/* ----------------------------------------------------------------------------
+ *                                   C-Report
+ * ----------------------------------------------------------------------------
+ * Author          : Markus Koch <markus@notsyncing.net>
+ * Contributors    : None
+ * License         : Mozilla Public License (MPL) Version 2
+ * ----------------------------------------------------------------------------
+*/
+
+
+#ifndef LOGGING_H
+#define LOGGING_H
+
+#include <errno.h>
+
+enum log_level {LL_CRITICAL = 0,
+		LL_ERROR,
+		LL_WARNING,
+		LL_INFO,
+		LL_DEBUG,
+		LL_NOISY,
+		LL_COUNT};
+int should_report(enum log_level log_level);
+enum log_level report(enum log_level log_level, const char *format, ...);
+void set_log_level(enum log_level log_level);
+enum log_level get_log_level();
+
+#endif // LOGGING_H

src/main.c

@@ -1,10 +1,46 @@
 #include <stdio.h>
+#include <stdlib.h>
+#include <getopt.h>
+
 #include "dijkstrasearch.h"
 #include <glib/glist.h>
+#include "geojson.h"
+#include "logging.h"
 
-
+void add_test_map(GList **nodes,
-int main()
+		  GList **paths)
 {
+	dijkstra_path_new_to_list(nodes,
+				  paths,
+				  0,0,
+				  0,10,
+				  "Vertical",
+				  1);
+
+	dijkstra_path_new_to_list(nodes,
+				  paths,
+				  0,5,
+				  10,5,
+				  "Horizontal",
+				  1);
+}
+
+void help(const char *exec)
+{
+	fprintf(stderr,
+		"Usage: %s [OPTION] [FILE]...\n"
+		"Start the lifo-dijkstraserv routing server.\n\n"
+		"  -s\tset output to silent\n"
+		"  -v\tincrease verbosity. Maybe used multiple times.\n"
+		"  -p\tport number (default 6802)\n",
+		exec);
+}
+
+int main(int argc, char *argv[])
+{
+	int opt;
+	int i;
+
 	GList *nodes = NULL;
 	GList *paths = NULL;
 
@@ -12,36 +48,76 @@ int main()
 	struct dijkstra_node *node;
 	struct dijkstra_path *path;
 
-	dijkstra_path_new_to_list(&nodes,
+	set_log_level(LL_INFO);
-				  &paths,
-				  0,0,
-				  0,10,
-				  "Vertical",
-				  1);
 
-	dijkstra_path_new_to_list(&nodes,
+	// Process arguments
-				  &paths,
+	while((opt = getopt(argc, argv, "vs")) != -1) {
-				  0,5,
+		switch(opt)
-				  10,5,
+				{
-				  "Horizontal",
+				case 'v':
-				  1);
+					set_log_level(get_log_level() + 1);
+					break;
+				case 's':
+					set_log_level(0);
+					break;
+				case ':':
+				case '?':
+					help(argv[0]);
+					return 1;
+				default:
+					break;
+				}
+	}
+
+	if (optind == argc) {
+		help(argv[0]);
+		return 1;
+	}
+
+	/* Parse file list */
+	for (i = optind; i < argc; ++i) {
+		add_geojson_to_dijkstra(&nodes, &paths, argv[i]);
+	}
+
+	// add_test_map(&nodes, &paths);
+
+	if (should_report(LL_NOISY)) {
+		for (l = nodes; l != NULL; l = l->next) {
+			node = (struct dijkstra_node*) l->data;
+			printf("Node %p: %f,\t%f [%d paths]\n", node, node->position.x, node->position.y, g_list_length(node->paths));
+		}
+		printf("\n");
+
+		for (l = paths; l != NULL; l = l->next) {
+			path = (struct dijkstra_path*) l->data;
+			printf("Path %p: %p (%f,%f) -> %p (%f,%f) \t\"%s\"\n", path,
+			       path->source, path->source->position.x, path->source->position.y,
+			       path->destination, path->destination->position.x, path->destination->position.y,
+			       path->name);
+		}
+		printf("\n");
+	}
+
+	report(LL_INFO, "Created graph with %d nodes and %d paths.",
+	       g_list_length(nodes),
+	       g_list_length(paths));
+
+	// Free memory
+	for (l = paths; l != NULL; l = l->next) {
+		path = (struct dijkstra_path*) l->data;
+		// TODO: free(path->name);
+		//   Currently, we reuse the existing memory block when for the
+		//   name when cloning streets. As such, clearing it here will
+		//   cause a double free if the street has been split.
+		free(path);
+	}
+	g_list_free(paths);
 
 	for (l = nodes; l != NULL; l = l->next) {
 		node = (struct dijkstra_node*) l->data;
-		printf("Node %p: %f,\t%f [%d paths]\n", node, node->position.x, node->position.y, g_list_length(node->paths));
+		free(node);
 	}
-	printf("\n");
+	g_list_free(nodes);
 
-	for (l = paths; l != NULL; l = l->next) {
-		path = (struct dijkstra_path*) l->data;
-		printf("Path %p: %p (%f,%f) -> %p (%f,%f) \t\"%s\"\n", path,
-		       path->source, path->source->position.x, path->source->position.y,
-		       path->destination, path->destination->position.x, path->destination->position.y,
-		       path->name);
-	}
-
-	printf("\nDone.\n");
-
-	// TODO: Free memory
 	return 0;
 }