about summary refs log tree commit diff
path: root/atom.c
blob: 1ed940abf0ffc9f3d5ad3a45bf2f1c60d0fde269 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
/* 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 <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <sysexits.h>
#include <time.h>

#include "archive.h"

const char *atomBaseURL;

static char *atomID(const struct Envelope *envelope) {
	struct Variable vars[] = {
		{ "messageID", envelope->messageID },
		{0},
	};
	return templateURL("mailto:?Message-Id=[messageID]", vars);
}

static int atomAuthor(FILE *file, struct Address addr) {
	// TODO: Conditionally include <email>.
	const char *template = TEMPLATE(
		<author>
			<name>[name]</name>
			<email>[mailbox]@[host]</email>
		</author>
	);
	struct Variable vars[] = {
		{ "name", addressName(addr) },
		{ "mailbox", addr.mailbox },
		{ "host", addr.host },
		{0},
	};
	return templateRender(file, template, vars, escapeXML);
}

static char *atomEntryURL(const struct Envelope *envelope) {
	struct Variable vars[] = {
		{ "name", pathSafe(envelope->messageID) },
		{0},
	};
	return templateURL("/message/[name].mbox", vars);
}

int atomEntryOpen(FILE *file, const struct Envelope *envelope) {
	const char *template = TEMPLATE(
		<entry>
		<id>[id]</id>
		<title>[title]</title>
		<updated>[updated]</updated>
		<link rel="alternate" type="application/mbox" href="[base][url]"/>
	);
	char *id = atomID(envelope);
	char updated[sizeof("0000-00-00T00:00:00Z")];
	strftime(updated, sizeof(updated), "%FT%TZ", gmtime(&envelope->time));
	char *url = atomEntryURL(envelope);
	struct Variable vars[] = {
		{ "id", id },
		{ "title", envelope->subject },
		{ "updated", updated },
		{ "base", (atomBaseURL ? atomBaseURL : "") },
		{ "url", url },
		{0},
	};
	int error = 0
		|| templateRender(file, template, vars, escapeXML)
		|| atomAuthor(file, envelope->from);
	free(id);
	free(url);
	return error;
}

int atomContentOpen(FILE *file) {
	return templateRender(file, TEMPLATE(<content type="text">), NULL, NULL);
}

int atomContentClose(FILE *file) {
	return templateRender(file, TEMPLATE(</content>), NULL, NULL);
}

int atomEntryClose(FILE *file) {
	return templateRender(file, TEMPLATE(</entry>), NULL, NULL);
}

static char *atomFeedURL(const struct Envelope *envelope, const char *type) {
	struct Variable vars[] = {
		{ "name", pathSafe(envelope->messageID) },
		{ "type", type },
		{0},
	};
	return templateURL("/thread/[name].[type]", vars);
}

int atomFeedOpen(FILE *file, const struct Envelope *envelope) {
	const char *template = TEMPLATE(
		<[q]xml version="1.0" encoding="utf-8"[q]>
		<feed xmlns="http://www.w3.org/2005/Atom">
		<id>[id]</id>
		<title>[title]</title>
		<updated>[updated]</updated>
		<link rel="self" href="[base][atom]"/>
		<link rel="alternate" type="text/html" href="[base][html]"/>
		<link rel="alternate" type="application/mbox" href="[base][mbox]"/>
	);
	char *id = atomID(envelope);
	time_t now = time(NULL);
	char updated[sizeof("0000-00-00T00:00:00Z")];
	strftime(updated, sizeof(updated), "%FT%TZ", gmtime(&now));
	char *atom = atomFeedURL(envelope, "atom");
	char *html = atomFeedURL(envelope, "html");
	char *mbox = atomFeedURL(envelope, "mbox");
	struct Variable vars[] = {
		{ "q", "?" },
		{ "id", id },
		{ "title", envelope->subject },
		{ "updated", updated },
		{ "base", (atomBaseURL ? atomBaseURL : "") },
		{ "atom", atom },
		{ "html", html },
		{ "mbox", mbox },
		{0},
	};
	int error = 0
		|| templateRender(file, template, vars, escapeXML)
		|| atomAuthor(file, envelope->from);
	free(id);
	free(atom);
	free(html);
	free(mbox);
	return error;
}

int atomFeedClose(FILE *file) {
	return templateRender(file, TEMPLATE(</feed>), NULL, NULL);
}