HTML list exporter

Exporting the raw dive list into JSON format for later viewing with html
and js files.  Also some worldmap code organizations.

Signed-off-by: Gehad elrobey <gehadelrobey@gmail.com>
Signed-off-by: Miika Turkia <miika.turkia@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

save-html.c

@@ -0,0 +1,154 @@
+#include "save-html.h"
+#include "gettext.h"
+
+void put_HTML_date(struct membuffer *b, struct dive *dive, const char *pre, const char *post)
+{
+	struct tm tm;
+	utc_mkdate(dive->when, &tm);
+	put_format(b, "%s%04u-%02u-%02u%s", pre, tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday, post);
+}
+
+char *replace_char(char *str, char replace, char *replace_by)
+{
+	/*
+		this function can't replace a character with a substring
+		where the substring contains the character, infinite loop.
+	*/
+
+	if (!str)
+		return 0;
+
+	int i = 0, char_count = 0, new_size;
+
+	while (str[i] != '\0') {
+		if (str[i] == replace)
+			char_count++;
+		i++;
+	}
+
+	new_size = strlen(str) + char_count * strlen(replace_by) + 1;
+	char *result = malloc(new_size);
+	char *temp = strdup(str);
+	char *p0, *p1;
+	if (!result || !temp)
+		return 0;
+	result[0] = '\0';
+	p0 = temp;
+	p1 = strchr(temp, replace);
+	while (p1) {
+		*p1 = '\0';
+		strcat(result, p0);
+		strcat(result, replace_by);
+		p0 = p1 + 1;
+		p1 = strchr(p0, replace);
+	}
+	strcat(result, p0); /*concat the rest of the string*/
+	free(temp);
+	return result;
+}
+
+char *quote(char *string)
+{
+	char *new_line_removed = replace_char(string, '\n', "<br>");
+	char *single_quotes_removed = replace_char(new_line_removed, '\'', "&#39;");
+	free(new_line_removed);
+	return single_quotes_removed;
+}
+
+void put_HTML_notes(struct membuffer *b, struct dive *dive, const char *pre, const char *post)
+{
+	if (dive->notes) {
+		char *notes = quote(dive->notes);
+		put_format(b, "%s: %s %s", pre, notes, post);
+		free(notes);
+	}
+}
+
+void put_HTML_time(struct membuffer *b, struct dive *dive, const char *pre, const char *post)
+{
+	struct tm tm;
+	utc_mkdate(dive->when, &tm);
+	put_format(b, "%s%02u:%02u:%02u%s", pre, tm.tm_hour, tm.tm_min, tm.tm_sec, post);
+}
+
+void put_HTML_airtemp(struct membuffer *b, struct dive *dive, const char *pre, const char *post)
+{
+	const char *unit;
+	double value;
+
+	value = get_temp_units(dive->airtemp.mkelvin, &unit);
+	put_format(b, "%s%.1f %s%s",pre, value, unit, post);
+}
+
+void put_HTML_watertemp(struct membuffer *b, struct dive *dive, const char *pre, const char *post)
+{
+	const char *unit;
+	double value;
+
+	value = get_temp_units(dive->watertemp.mkelvin, &unit);
+	put_format(b, "%s%.1f %s%s",pre, value, unit, post);
+}
+
+void put_HTML_tags(struct membuffer *b, struct dive *dive, const char *pre, const char *post)
+{
+	put_string(b, pre);
+	struct tag_entry *tag = dive->tag_list;
+	while(tag){
+		put_format(b, "%s ", tag->tag->name);
+		tag = tag->next;
+	}
+	put_string(b, post);
+}
+
+void write_dives(struct membuffer *b,bool selected_only)
+{
+	int i, dive_no = 0;
+	struct dive *dive;
+
+	for_each_dive(i, dive) {
+		if (selected_only) {
+			if (!dive->selected)
+				continue;
+		}
+		put_string(b, "{");
+		put_format(b, "\"number\":%d,", dive_no);
+		put_HTML_date(b, dive, "\"date\":\"", "\",");
+		put_HTML_time(b, dive, "\"time\":\"", "\",");
+		put_format(b, "\"location\":\"%s\",", dive->location);
+		put_format(b, "\"rating\":%d,", dive->rating);
+		put_format(b, "\"visibility\":%d,", dive->visibility);
+		put_string(b, "\"temperature\":{");
+		put_HTML_airtemp(b, dive, "\"air\":\"", "\",");
+		put_HTML_watertemp(b, dive, "\"water\":\"", "\",");
+		put_string(b, "	},");
+		put_format(b, "\"buddy\":\"%s\",", dive->buddy);
+		put_format(b, "\"divemaster\":\"%s\",", dive->divemaster);
+		put_format(b, "\"suit\":\"%s\",", dive->suit);
+		put_HTML_tags(b, dive, "\"tags\":\"", "\",");
+		put_HTML_notes(b, dive ,"\"notes\":\"" ,"\",");
+		put_string(b, "},\n");
+		dive_no++;
+	}
+}
+
+void export_dives(struct membuffer *b,bool selected_only){
+	put_string(b, "items=[");
+	write_dives(b, selected_only);
+	put_string(b, "]");
+}
+
+void export_HTML(const char *file_name, const bool selected_only)
+{
+	FILE *f;
+
+	struct membuffer buf = { 0 };
+	export_dives(&buf, selected_only);
+
+	f = fopen(file_name, "w+");
+	if (!f)
+		printf("error"); /*report error*/
+
+	flush_buffer(&buf, f); /*check for writing errors? */
+	free_buffer(&buf);
+	fclose(f);
+}