/* ui-shared.c: common web output functions
 *
 * Copyright (C) 2006 Lars Hjemli
 *
 * Licensed under GNU General Public License v2
 *   (see COPYING for full license text)
 */

#include "cgit.h"
#include "cmd.h"
#include "html.h"

const char cgit_doctype[] =
"<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Transitional//EN\"\n"
"  \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\">\n";

static char *http_date(time_t t)
{
	static char day[][4] =
		{"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"};
	static char month[][4] =
		{"Jan", "Feb", "Mar", "Apr", "May", "Jun",
		 "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
	struct tm *tm = gmtime(&t);
	return fmt("%s, %02d %s %04d %02d:%02d:%02d GMT", day[tm->tm_wday],
		   tm->tm_mday, month[tm->tm_mon], 1900+tm->tm_year,
		   tm->tm_hour, tm->tm_min, tm->tm_sec);
}

void cgit_print_error(const char *msg)
{
	html("<div class='error'>");
	html_txt(msg);
	html("</div>\n");
}

char *cgit_httpscheme()
{
	if (ctx.env.https && !strcmp(ctx.env.https, "on"))
		return "https://";
	else
		return "http://";
}

char *cgit_hosturl()
{
	if (ctx.env.http_host)
		return ctx.env.http_host;
	if (!ctx.env.server_name)
		return NULL;
	if (!ctx.env.server_port || atoi(ctx.env.server_port) == 80)
		return ctx.env.server_name;
	return xstrdup(fmt("%s:%s", ctx.env.server_name, ctx.env.server_port));
}

char *cgit_rooturl()
{
	if (ctx.cfg.virtual_root)
		return fmt("%s/", ctx.cfg.virtual_root);
	else
		return ctx.cfg.script_name;
}

char *cgit_repourl(const char *reponame)
{
	if (ctx.cfg.virtual_root) {
		return fmt("%s/%s/", ctx.cfg.virtual_root, reponame);
	} else {
		return fmt("?r=%s", reponame);
	}
}

char *cgit_fileurl(const char *reponame, const char *pagename,
		   const char *filename, const char *query)
{
	char *tmp;
	char *delim;

	if (ctx.cfg.virtual_root) {
		tmp = fmt("%s/%s/%s/%s", ctx.cfg.virtual_root, reponame,
			  pagename, (filename ? filename:""));
		delim = "?";
	} else {
		tmp = fmt("?url=%s/%s/%s", reponame, pagename,
			  (filename ? filename : ""));
		delim = "&";
	}
	if (query)
		tmp = fmt("%s%s%s", tmp, delim, query);
	return tmp;
}

char *cgit_pageurl(const char *reponame, const char *pagename,
		   const char *query)
{
	return cgit_fileurl(reponame,pagename,0,query);
}

const char *cgit_repobasename(const char *reponame)
{
	/* I assume we don't need to store more than one repo basename */
	static char rvbuf[1024];
	int p;
	const char *rv;
	strncpy(rvbuf,reponame,sizeof(rvbuf));
	if(rvbuf[sizeof(rvbuf)-1])
		die("cgit_repobasename: truncated repository name '%s'", reponame);
	p = strlen(rvbuf)-1;
	/* strip trailing slashes */
	while(p && rvbuf[p]=='/') rvbuf[p--]=0;
	/* strip trailing .git */
	if(p>=3 && !strncmp(&rvbuf[p-3],".git",4)) {
		p -= 3; rvbuf[p--] = 0;
	}
	/* strip more trailing slashes if any */
	while( p && rvbuf[p]=='/') rvbuf[p--]=0;
	/* find last slash in the remaining string */
	rv = strrchr(rvbuf,'/');
	if(rv)
		return ++rv;
	return rvbuf;
}

char *cgit_currurl()
{
	if (!ctx.cfg.virtual_root)
		return ctx.cfg.script_name;
	else if (ctx.qry.page)
		return fmt("%s/%s/%s/", ctx.cfg.virtual_root, ctx.qry.repo, ctx.qry.page);
	else if (ctx.qry.repo)
		return fmt("%s/%s/", ctx.cfg.virtual_root, ctx.qry.repo);
	else
		return fmt("%s/", ctx.cfg.virtual_root);
}

static void site_url(const char *page, const char *search, int ofs)
{
	char *delim = "?";

	if (ctx.cfg.virtual_root) {
		html_attr(ctx.cfg.virtual_root);
		if (ctx.cfg.virtual_root[strlen(ctx.cfg.virtual_root) - 1] != '/')
			html("/");
	} else
		html(ctx.cfg.script_name);

	if (page) {
		htmlf("?p=%s", page);
		delim = "&";
	}
	if (search) {
		html(delim);
		html("q=");
		html_attr(search);
		delim = "&";
	}
	if (ofs) {
		html(delim);
		htmlf("ofs=%d", ofs);
	}
}

static void site_link(const char *page, const char *name, const char *title,
		      const char *class, const char *search, int ofs)
{
	html("<a");
	if (title) {
		html(" title='");
		html_attr(title);
		html("'");
	}
	if (class) {
		html(" class='");
		html_attr(class);
		html("'");
	}
	html(" href='");
	site_url(page, search, ofs);
	html("'>");
	html_txt(name);
	html("</a>");
}

void cgit_index_link(const char *name, const char *title, const char *class,
		     const char *pattern, int ofs)
{
	site_link(NULL, name, title, class, pattern, ofs);
}

static char *repolink(const char *title, const char *class, const char *page,
		      const char *head, const char *path)
{
	char *delim = "?";

	html("<a");
	if (title) {
		html(" title='");
		html_attr(title);
		html("'");
	}
	if (class) {
		html(" class='");
		html_attr(class);
		html("'");
	}
	html(" href='");
	if (ctx.cfg.virtual_root) {
		html_url_path(ctx.cfg.virtual_root);
		if (ctx.cfg.virtual_root[strlen(ctx.cfg.virtual_root) - 1] != '/')
			html("/");
		html_url_path(ctx.repo->url);
		if (ctx.repo->url[strlen(ctx.repo->url) - 1] != '/')
			html("/");
		if (page) {
			html_url_path(page);
			html("/");
			if (path)
				html_url_path(path);
		}
	} else {
		html(ctx.cfg.script_name);
		html("?url=");
		html_url_arg(ctx.repo->url);
		if (ctx.repo->url[strlen(ctx.repo->url) - 1] != '/')
			html("/");
		if (page) {
			html_url_arg(page);
			html("/");
			if (path)
				html_url_arg(path);
		}
		delim = "&amp;";
	}
	if (head && strcmp(head, ctx.repo->defbranch)) {
		html(delim);
		html("h=");
		html_url_arg(head);
		delim = "&amp;";
	}
	return fmt("%s", delim);
}

static void reporevlink(const char *page, const char *name, const char *title,
			const char *class, const char *head, const char *rev,
			const char *path)
{
	char *delim;

	delim = repolink(title, class, page, head, path);
	if (rev && ctx.qry.head != NULL && strcmp(rev, ctx.qry.head)) {
		html(delim);
		html("id=");
		html_url_arg(rev);
	}
	html("'>");
	html_txt(name);
	html("</a>");
}

void cgit_summary_link(const char *name, const char *title, const char *class,
		       const char *head)
{
	reporevlink(NULL, name, title, class, head, NULL, NULL);
}

void cgit_tag_link(const char *name, const char *title, const char *class,
		   const char *head, const char *rev)
{
	reporevlink("tag", name, title, class, head, rev, NULL);
}

void cgit_tree_link(const char *name, const char *title, const char *class,
		    const char *head, const char *rev, const char *path)
{
	reporevlink("tree", name, title, class, head, rev, path);
}

void cgit_plain_link(const char *name, const char *title, const char *class,
		     const char *head, const char *rev, const char *path)
{
	reporevlink("plain", name, title, class, head, rev, path);
}

void cgit_log_link(const char *name, const char *title, const char *class,
		   const char *head, const char *rev, const char *path,
		   int ofs, const char *grep, const char *pattern, int showmsg)
{
	char *delim;

	delim = repolink(title, class, "log", head, path);
	if (rev && strcmp(rev, ctx.qry.head)) {
		html(delim);
		html("id=");
		html_url_arg(rev);
		delim = "&";
	}
	if (grep && pattern) {
		html(delim);
		html("qt=");
		html_url_arg(grep);
		delim = "&";
		html(delim);
		html("q=");
		html_url_arg(pattern);
	}
	if (ofs > 0) {
		html(delim);
		html("ofs=");
		htmlf("%d", ofs);
		delim = "&";
	}
	if (showmsg) {
		html(delim);
		html("showmsg=1");
	}
	html("'>");
	html_txt(name);
	html("</a>");
}

void cgit_commit_link(char *name, const char *title, const char *class,
		      const char *head, const char *rev, const char *path,
		      int toggle_ssdiff)
{
	if (strlen(name) > ctx.cfg.max_msg_len && ctx.cfg.max_msg_len >= 15) {
		name[ctx.cfg.max_msg_len] = '\0';
		name[ctx.cfg.max_msg_len - 1] = '.';
		name[ctx.cfg.max_msg_len - 2] = '.';
		name[ctx.cfg.max_msg_len - 3] = '.';
	}

	char *delim;

	delim = repolink(title, class, "commit", head, path);
	if (rev && strcmp(rev, ctx.qry.head)) {
		html(delim);
		html("id=");
		html_url_arg(rev);
		delim = "&amp;";
	}
	if ((ctx.qry.ssdiff && !toggle_ssdiff) || (!ctx.qry.ssdiff && toggle_ssdiff)) {
		html(delim);
		html("ss=1");
		delim = "&amp;";
	}
	if (ctx.qry.context > 0 && ctx.qry.context != 3) {
		html(delim);
		html("context=");
		htmlf("%d", ctx.qry.context);
		delim = "&amp;";
	}
	if (ctx.qry.ignorews) {
		html(delim);
		html("ignorews=1");
		delim = "&amp;";
	}
	html("'>");
	html_txt(name);
	html("</a>");
}

void cgit_refs_link(const char *name, const char *title, const char *class,
		    const char *head, const char *rev, const char *path)
{
	reporevlink("refs", name, title, class, head, rev, path);
}

void cgit_snapshot_link(const char *name, const char *title, const char *class,
			const char *head, const char *rev,
			const char *archivename)
{
	reporevlink("snapshot", name, title, class, head, rev, archivename);
}

void cgit_diff_link(const char *name, const char *title, const char *class,
		    const char *head, const char *new_rev, const char *old_rev,
		    const char *path, int toggle_ssdiff)
{
	char *delim;

	delim = repolink(title, class, "diff", head, path);
	if (new_rev && ctx.qry.head != NULL && strcmp(new_rev, ctx.qry.head)) {
		html(delim);
		html("id=");
		html_url_arg(new_rev);
		delim = "&amp;";
	}
	if (old_rev) {
		html(delim);
		html("id2=");
		html_url_arg(old_rev);
		delim = "&amp;";
	}
	if ((ctx.qry.ssdiff && !toggle_ssdiff) || (!ctx.qry.ssdiff && toggle_ssdiff)) {
		html(delim);
		html("ss=1");
		delim = "&amp;";
	}
	if (ctx.qry.context > 0 && ctx.qry.context != 3) {
		html(delim);
		html("context=");
		htmlf("%d", ctx.qry.context);
		delim = "&amp;";
	}
	if (ctx.qry.ignorews) {
		html(delim);
		html("ignorews=1");
		delim = "&amp;";
	}
	html("'>");
	html_txt(name);
	html("</a>");
}

void cgit_patch_link(const char *name, const char *title, const char *class,
		     const char *head, const char *rev, const char *path)
{
	reporevlink("patch", name, title, class, head, rev, path);
}

void cgit_stats_link(const char *name, const char *title, const char *class,
		     const char *head, const char *path)
{
	reporevlink("stats", name, title, class, head, NULL, path);
}

void cgit_self_link(char *name, const char *title, const char *class,
		    struct cgit_context *ctx)
{
	if (!strcmp(ctx->qry.page, "repolist"))
		return cgit_index_link(name, title, class, ctx->qry.search,
				       ctx->qry.ofs);
	else if (!strcmp(ctx->qry.page, "summary"))
		return cgit_summary_link(name, title, class, ctx->qry.head);
	else if (!strcmp(ctx->qry.page, "tag"))
		return cgit_tag_link(name, title, class, ctx->qry.head,
				     ctx->qry.has_sha1 ? ctx->qry.sha1 : NULL);
	else if (!strcmp(ctx->qry.page, "tree"))
		return cgit_tree_link(name, title, class, ctx->qry.head,
				      ctx->qry.has_sha1 ? ctx->qry.sha1 : NULL,
				      ctx->qry.path);
	else if (!strcmp(ctx->qry.page, "plain"))
		return cgit_plain_link(name, title, class, ctx->qry.head,
				      ctx->qry.has_sha1 ? ctx->qry.sha1 : NULL,
				      ctx->qry.path);
	else if (!strcmp(ctx->qry.page, "log"))
		return cgit_log_link(name, title, class, ctx->qry.head,
				      ctx->qry.has_sha1 ? ctx->qry.sha1 : NULL,
				      ctx->qry.path, ctx->qry.ofs,
				      ctx->qry.grep, ctx->qry.search,
				      ctx->qry.showmsg);
	else if (!strcmp(ctx->qry.page, "commit"))
		return cgit_commit_link(name, title, class, ctx->qry.head,
				      ctx->qry.has_sha1 ? ctx->qry.sha1 : NULL,
				      ctx->qry.path, 0);
	else if (!strcmp(ctx->qry.page, "patch"))
		return cgit_patch_link(name, title, class, ctx->qry.head,
				      ctx->qry.has_sha1 ? ctx->qry.sha1 : NULL,
				      ctx->qry.path);
	else if (!strcmp(ctx->qry.page, "refs"))
		return cgit_refs_link(name, title, class<style>pre { line-height: 125%; }
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.highlight .nb { color: #003388 } /* Name.Builtin */
.highlight .nc { color: #bb0066; font-weight: bold } /* Name.Class */
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.highlight .ss { color: #aa6600; background-color: #fff0f0 } /* Literal.String.Symbol */
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.highlight .il { color: #0000DD; font-weight: bold } /* Literal.Number.Integer.Long */</style><div class="highlight"><pre><span></span><span class="cm">/* scan-tree.c</span>
<span class="cm"> *</span>
<span class="cm"> * Copyright (C) 2006-2014 cgit Development Team &lt;cgit@lists.zx2c4.com&gt;</span>
<span class="cm"> *</span>
<span class="cm"> * Licensed under GNU General Public License v2</span>
<span class="cm"> *   (see COPYING for full license text)</span>
<span class="cm"> */</span>

<span class="cp">#include</span><span class="w"> </span><span class="cpf">&quot;cgit.h&quot;</span>
<span class="cp">#include</span><span class="w"> </span><span class="cpf">&quot;scan-tree.h&quot;</span>
<span class="cp">#include</span><span class="w"> </span><span class="cpf">&quot;configfile.h&quot;</span>
<span class="cp">#include</span><span class="w"> </span><span class="cpf">&quot;html.h&quot;</span>

<span class="cm">/* return 1 if path contains a objects/ directory and a HEAD file */</span>
<span class="k">static</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="nf">is_git_dir</span><span class="p">(</span><span class="k">const</span><span class="w"> </span><span class="kt">char</span><span class="w"> </span><span class="o">*</span><span class="n">path</span><span class="p">)</span>
<span class="p">{</span>
<span class="w">	</span><span class="k">struct</span><span class="w"> </span><span class="nc">stat</span><span class="w"> </span><span class="n">st</span><span class="p">;</span>
<span class="w">	</span><span class="k">struct</span><span class="w"> </span><span class="nc">strbuf</span><span class="w"> </span><span class="n">pathbuf</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">STRBUF_INIT</span><span class="p">;</span>
<span class="w">	</span><span class="kt">int</span><span class="w"> </span><span class="n">result</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">0</span><span class="p">;</span>

<span class="w">	</span><span class="n">strbuf_addf</span><span class="p">(</span><span class="o">&amp;</span><span class="n">pathbuf</span><span class="p">,</span><span class="w"> </span><span class="s">&quot;%s/objects&quot;</span><span class="p">,</span><span class="w"> </span><span class="n">path</span><span class="p">);</span>
<span class="w">	</span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">stat</span><span class="p">(</span><span class="n">pathbuf</span><span class="p">.</span><span class="n">buf</span><span class="p">,</span><span class="w"> </span><span class="o">&amp;</span><span class="n">st</span><span class="p">))</span><span class="w"> </span><span class="p">{</span>
<span class="w">		</span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">errno</span><span class="w"> </span><span class="o">!=</span><span class="w"> </span><span class="n">ENOENT</span><span class="p">)</span>
<span class="w">			</span><span class="n">fprintf</span><span class="p">(</span><span class="n">stderr</span><span class="p">,</span><span class="w"> </span><span class="s">&quot;Error checking path %s: %s (%d)</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">,</span>
<span class="w">				</span><span class="n">path</span><span class="p">,</span><span class="w"> </span><span class="n">strerror</span><span class="p">(</span><span class="n">errno</span><span class="p">),</span><span class="w"> </span><span class="n">errno</span><span class="p">);</span>
<span class="w">		</span><span class="k">goto</span><span class="w"> </span><span class="n">out</span><span class="p">;</span>
<span class="w">	</span><span class="p">}</span>
<span class="w">	</span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="o">!</span><span class="n">S_ISDIR</span><span class="p">(</span><span class="n">st</span><span class="p">.</span><span class="n">st_mode</span><span class="p">))</span>
<span class="w">		</span><span class="k">goto</span><span class="w"> </span><span class="n">out</span><span class="p">;</span>

<span class="w">	</span><span class="n">strbuf_reset</span><span class="p">(</span><span class="o">&amp;</span><span class="n">pathbuf</span><span class="p">);</span>
<span class="w">	</span><span class="n">strbuf_addf</span><span class="p">(</span><span class="o">&amp;</span><span class="n">pathbuf</span><span class="p">,</span><span class="w"> </span><span class="s">&quot;%s/HEAD&quot;</span><span class="p">,</span><span class="w"> </span><span class="n">path</span><span class="p">);</span>
<span class="w">	</span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">stat</span><span class="p">(</span><span class="n">pathbuf</span><span class="p">.</span><span class="n">buf</span><span class="p">,</span><span class="w"> </span><span class="o">&amp;</span><span class="n">st</span><span class="p">))</span><span class="w"> </span><span class="p">{</span>
<span class="w">		</span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">errno</span><span class="w"> </span><span class="o">!=</span><span class="w"> </span><span class="n">ENOENT</span><span class="p">)</span>
<span class="w">			</span><span class="n">fprintf</span><span class="p">(</span><span class="n">stderr</span><span class="p">,</span><span class="w"> </span><span class="s">&quot;Error checking path %s: %s (%d)</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">,</span>
<span class="w">				</span><span class="n">path</span><span class="p">,</span><span class="w"> </span><span class="n">strerror</span><span class="p">(</span><span class="n">errno</span><span class="p">),</span><span class="w"> </span><span class="n">errno</span><span class="p">);</span>
<span class="w">		</span><span class="k">goto</span><span class="w"> </span><span class="n">out</span><span class="p">;</span>
<span class="w">	</span><span class="p">}</span>
<span class="w">	</span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="o">!</span><span class="n">S_ISREG</span><span class="p">(</span><span class="n">st</span><span class="p">.</span><span class="n">st_mode</span><span class="p">))</span>
<span class="w">		</span><span class="k">goto</span><span class="w"> </span><span class="n">out</span><span class="p">;</span>

<span class="w">	</span><span class="n">result</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">1</span><span class="p">;</span>
<span class="nl">out</span><span class="p">:</span>
<span class="w">	</span><span class="n">strbuf_release</span><span class="p">(</span><span class="o">&amp;</span><span class="n">pathbuf</span><span class="p">);</span>
<span class="w">	</span><span class="k">return</span><span class="w"> </span><span class="n">result</span><span class="p">;</span>
<span class="p">}</span>

<span class="k">static</span><span class="w"> </span><span class="k">struct</span><span class="w"> </span><span class="nc">cgit_repo</span><span class="w"> </span><span class="o">*</span><span class="n">repo</span><span class="p">;</span>
<span class="k">static</span><span class="w"> </span><span class="n">repo_conf