text: /* ui-summary.c: functions for generating repo summary page
   *
   * Copyright (C) 2006-2014 cgit Development Team <cgit@lists.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-blob.h"
  #include "ui-log.h"
  #include "ui-plain.h"
  #include "ui-refs.h"
  #include "ui-shared.h"
  
  static int urls;
  
  static void print_url(const char *url)
  {
  	int columns = 3;
  
  	if (ctx.repo->enable_log_filecount)
  		columns++;
  	if (ctx.repo->enable_log_linecount)
  		columns++;
  
  	if (urls++ == 0) {
  		htmlf("<tr class='nohover'><td colspan='%d'>&nbsp;</td></tr>", columns);
  		htmlf("<tr class='nohover'><th class='left' colspan='%d'>Clone</th></tr>\n", columns);
  	}
  
  	htmlf("<tr><td colspan='%d'><a rel='vcs-git' href='", columns);
  	html_url_path(url);
  	html("' title='");
  	html_attr(ctx.repo->name);
  	html(" Git repository'>");
  	html_txt(url);
  	html("</a></td></tr>\n");
  }
  
  void cgit_print_summary(void)
  {
  	int columns = 3;
  
  	if (ctx.repo->enable_log_filecount)
  		columns++;
  	if (ctx.repo->enable_log_linecount)
  		columns++;
  
  	cgit_print_layout_start();
  	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);
  	}
  	urls = 0;
  	cgit_add_clone_urls(print_url);
  	html("</table>");
  	cgit_print_layout_end();
  }
  
  /* 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 || !starts_with(resolved_full, resolved_base)) {
  			free(full_path);
  			full_path = NULL;
  		}
  	}
  
  	free(file);
  	free(resolved_base);
  	free(resolved_full);
  
  	return full_path;
  }
  
  void cgit_print_repo_readme(const char *path)
  {
  	char *filename, *ref, *mimetype;
  	int free_filename = 0;
  
  	mimetype = get_mimetype_for_filename(path);
  	if (mimetype && (!strncmp(mimetype, "image/", 6) || !strncmp(mimetype, "video/", 6))) {
  		ctx.page.mimetype = mimetype;
  		ctx.page.charset = NULL;
  		cgit_print_plain();
  		free(mimetype);
  		return;
  	}
  	free(mimetype);
  
  	cgit_print_layout_start();
  	if (ctx.repo->readme.nr == 0)
  		goto done;
  
  	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)
  			goto done;
  	}
  
  	/* Determine which file to serve by checking whether the given filename is
  	 * already a valid file and otherwise appending the expected file name of
  	 * the readme.
  	 *
  	 * If neither yield a valid file, the user gets a blank page. Could probably
  	 * do with an error message in between there, but whatever.
  	 */
  	if (path && ref && !cgit_ref_path_exists(filename, ref, 1)) {
  	  filename = fmtalloc("%s/%s", path, ctx.repo->readme.items[0].string);
  	  free_filename = 1;
  	}
  
  	/* Print the calculated readme, either from the git repo or from the
  	 * filesystem, while applying the about-filter.
  	 */
  	html("<div id='summary'>");
  	cgit_open_filter(ctx.repo->about_filter, filename);
  	if (ref)
  		cgit_print_file(filename, ref, 1);
  	else
  		html_include(filename);
  	cgit_close_filter(ctx.repo->about_filter);
  
  	html("</div>");
  	if (free_filename)
  		free(filename);
  
  done:
  	cgit_print_layout_end();
  }
  