/* ui-summary.c: functions for generating repo summary page
 *
 * Copyright (C) 2006 Lars Hjemli
 * Copyright (C) 2010-2013 Jason A. Donenfeld <Jason@zx2c4.com>
 *
 * Licensed under GNU General Public License v2
 *   (see COPYING for full license text)
 */

#include "cgit.h"
#include "ui-summary.h"
#include "html.h"
#include "ui-log.h"
#include "ui-refs.h"
#include "ui-blob.h"
#include <libgen.h>

static void print_url(char *base, char *suffix)
{
	int columns = 3;
	struct strbuf basebuf = STRBUF_INIT;

	if (ctx.repo->enable_log_filecount)
		columns++;
	if (ctx.repo->enable_log_linecount)
		columns++;

	if (!base || !*base)
		return;
	if (suffix && *suffix) {
		strbuf_addf(&basebuf, "%s/%s", base, suffix);
		base = basebuf.buf;
	}
	htmlf("<tr><td colspan='%d'><a href='", columns);
	html_url_path(base);
	html("'>");
	html_txt(base);
	html("</a></td></tr>\n");
	strbuf_release(&basebuf);
}

static void print_urls(char *txt, char *suffix)
{
	char *h = txt, *t, c;
	int urls = 0;
	int columns = 3;

	if (ctx.repo->enable_log_filecount)
		columns++;
	if (ctx.repo->enable_log_linecount)
		columns++;


	while (h && *h) {
		while (h && *h == ' ')
			h++;
		if (!*h)
			break;
		t = h;
		while (t && *t && *t != ' ')
			t++;
		c = *t;
		*t = 0;
		if (urls++ == 0) {
			htmlf("<tr class='nohover'><td colspan='%d'>&nbsp;</td></tr>", columns);
			htmlf("<tr><th class='left' colspan='%d'>Clone</th></tr>\n", columns);
		}
		print_url(h, suffix);
		*t = c;
		h = t;
	}
}

void cgit_print_summary()
{
	int columns = 3;

	if (ctx.repo->enable_log_filecount)
		columns++;
	if (ctx.repo->enable_log_linecount)
		columns++;

	html("<table summary='repository info' class='list nowrap'>");
	cgit_print_branches(ctx.cfg.summary_branches);
	htmlf("<tr class='nohover'><td colspan='%d'>&nbsp;</td></tr>", columns);
	cgit_print_tags(ctx.cfg.summary_tags);
	if (ctx.cfg.summary_log > 0) {
		htmlf("<tr class='nohover'><td colspan='%d'>&nbsp;</td></tr>", columns);
		cgit_print_log(ctx.qry.head, 0, ctx.cfg.summary_log, NULL,
			       NULL, NULL, 0, 0, 0);
	}
	if (ctx.repo->clone_url)
		print_urls(expand_macros(ctx.repo->clone_url), NULL);
	else if (ctx.cfg.clone_prefix)
		print_urls(ctx.cfg.clone_prefix, ctx.repo->url);
	html("</table>");
}

/* The caller must free the return value. */
static char* append_readme_path(const char *filename, const char *ref, const char *path)
{
	char *file, *base_dir, *full_path, *resolved_base = NULL, *resolved_full = NULL;
	/* If a subpath is specified for the about page, make it relative
	 * to the directory containing the configured readme. */

	file = xstrdup(filename);
	base_dir = dirname(file);
	if (!strcmp(base_dir, ".") || !strcmp(base_dir, "..")) {
		if (!ref) {
			free(file);
			return NULL;
		}
		full_path = xstrdup(path);
	} else
		full_path = fmtalloc("%s/%s", base_dir, path);
	
	if (!ref) {
		resolved_base = realpath(base_dir, NULL);
		resolved_full = realpath(full_path, NULL);
		if (!resolved_base || !resolved_full || strncmp(resolved_base, resolved_full, strlen(resolved_base))) {
			free(full_path);
			full_path = NULL;
		}
	}

	free(file);
	free(resolved_base);
	free(resolved_full);

	return full_path;
}

void cgit_print_repo_readme(char *path)
{
	char *filename, *ref;
	int free_filename = 0;

	if (ctx.repo->readme.nr == 0)
		return;
	
	filename = ctx.repo->readme.items[0].string;
	ref = ctx.repo->readme.items[0].util;

	if (path) {
		free_filename = 1;
		filename = append_readme_path(filename, ref, path);
		if (!filename)
			return;
	}

	/* Print the calculated readme, either from the git repo or from the
	 * filesystem, while applying the about-filter.
	 */
	html("<div id='summary'>");
	if (ctx.repo->about_filter) {
		ctx.repo->about_filter->argv[1] = filename;
		cgit_open_filter(ctx.repo->about_filter);
	}
	if (ref)
		cgit_print_file(filename, ref, 1);
	else
		html_include(filename);
	if (ctx.repo->about_filter) {
		cgit_close_filter(ctx.repo->about_filter);
		ctx.repo->about_filter->argv[1] = NULL;
	}
	html("</div>");
	if (free_filename)
		free(filename);
}