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/* Copyright (C) 2020  C. McEnroe <june@causal.agency>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

#include <stdio.h>
#include <stdlib.h>
#include <time.h>

#include "imap.h"

struct Address {
	char *name;
	const char *mailbox;
	const char *host;
};

struct AddressList {
	size_t len;
	struct Address *addrs;
};

struct Envelope {
	time_t utc;
	struct tm date;
	char *subject;
	struct Address from, sender, replyTo;
	struct AddressList to, cc, bcc;
	const char *inReplyTo;
	const char *messageID;
};

static inline void envelopeFree(struct Envelope envelope) {
	free(envelope.subject);
	free(envelope.from.name);
	free(envelope.sender.name);
	free(envelope.replyTo.name);
	for (size_t i = 0; i < envelope.to.len; ++i) {
		free(envelope.to.addrs[i].name);
	}
	for (size_t i = 0; i < envelope.cc.len; ++i) {
		free(envelope.cc.addrs[i].name);
	}
	for (size_t i = 0; i < envelope.bcc.len; ++i) {
		free(envelope.bcc.addrs[i].name);
	}
	free(envelope.to.addrs);
	free(envelope.cc.addrs);
	free(envelope.bcc.addrs);
}

enum Atom exportThreads(FILE *imap, struct List threads);
void exportData(struct List items);

#define TEMPLATE(...) #__VA_ARGS__

struct Variable {
	const char *name;
	const char *value;
};

typedef int EscapeFn(FILE *file, const char *str);

int escapeURL(FILE *file, const char *str);
int escapeXML(FILE *file, const char *str);

int templateRender(
	FILE *file, const char *template,
	const struct Variable vars[], EscapeFn *escape
);
char *templateURL(const char *template, const struct Variable vars[]);

#define MBOX_HEADERS \
	"Date Subject From Sender Reply-To To Cc Bcc " \
	"Message-Id In-Reply-To References " \
	"MIME-Version Content-Type Content-Disposition Content-Transfer-Encoding"

int mboxFrom(FILE *file);
int mboxHeader(FILE *file, char *header);
int mboxBody(FILE *file, char *body);

int htmlEnvelope(FILE *file, const struct Envelope *envelope);

int atomEnvelope(FILE *file, const struct Envelope *envelope);