/* 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 Affero 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <sysexits.h>

#include "server.h"

const char *NetworksQuery = SQL(
	SELECT DISTINCT network
	FROM contexts
	ORDER BY network;
);

enum kcgi_err pageNetworks(struct kreq *req) {
	enum kcgi_err error = httpHead(req, KHTTP_200, KMIME_TEXT_HTML);
	if (req->method == KMETHOD_HEAD) return error;

	struct khtmlreq html;
	error = error
		|| khttp_body(req)
		|| khtml_open(&html, req, KHTML_PRETTY)
		|| htmlHead(&html, "Networks")
		|| htmlNav(&html, NULL, NULL)
		|| htmlSearch(&html, NULL, NULL)
		|| khtml_elem(&html, KELEM_UL);
	if (error) return error;

	int result;
	while (SQLITE_ROW == (result = sqlite3_step(stmt.networks))) {
		const char *network = (const char *)sqlite3_column_text(stmt.networks, 0);
		char *href = khttp_urlpart(
			NULL, NULL, Pages[Contexts],
			Keys[Network].name, network,
			NULL
		);
		if (!href) err(EX_OSERR, "khttp_urlpart");

		error = 0
			|| khtml_elem(&html, KELEM_LI)
			|| khtml_attr(&html, KELEM_A, KATTR_HREF, href, KATTR__MAX)
			|| khtml_puts(&html, network)
			|| khtml_closeelem(&html, 2);
		free(href);
		if (error) break;
	}
	if (result != SQLITE_DONE) errx(EX_SOFTWARE, "%s", sqlite3_errmsg(db));
	sqlite3_reset(stmt.networks);

	return error || khtml_close(&html);
}