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
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
//! # Constants.

#![allow(missing_docs)]

use deltachat_derive::{FromSql, ToSql};
use once_cell::sync::Lazy;
use serde::{Deserialize, Serialize};

use crate::chat::ChatId;

pub static DC_VERSION_STR: Lazy<String> = Lazy::new(|| env!("CARGO_PKG_VERSION").to_string());

#[derive(
    Debug,
    Default,
    Display,
    Clone,
    Copy,
    PartialEq,
    Eq,
    FromPrimitive,
    ToPrimitive,
    FromSql,
    ToSql,
    Serialize,
    Deserialize,
)]
#[repr(i8)]
pub enum Blocked {
    #[default]
    Not = 0,
    Yes = 1,
    Request = 2,
}

#[derive(
    Debug, Default, Display, Clone, Copy, PartialEq, Eq, FromPrimitive, ToPrimitive, FromSql, ToSql,
)]
#[repr(u8)]
pub enum ShowEmails {
    Off = 0,
    AcceptedContacts = 1,
    #[default] // also change Config.ShowEmails props(default) on changes
    All = 2,
}

#[derive(
    Debug, Default, Display, Clone, Copy, PartialEq, Eq, FromPrimitive, ToPrimitive, FromSql, ToSql,
)]
#[repr(u8)]
pub enum MediaQuality {
    #[default] // also change Config.MediaQuality props(default) on changes
    Balanced = 0,
    Worse = 1,
}

/// Type of the key to generate.
#[derive(
    Debug, Default, Display, Clone, Copy, PartialEq, Eq, FromPrimitive, ToPrimitive, FromSql, ToSql,
)]
#[repr(u8)]
pub enum KeyGenType {
    #[default]
    Default = 0,

    /// 2048-bit RSA.
    Rsa2048 = 1,

    /// [Ed25519](https://ed25519.cr.yp.to/) signature and X25519 encryption.
    Ed25519 = 2,

    /// 4096-bit RSA.
    Rsa4096 = 3,
}

/// Video chat URL type.
#[derive(
    Debug, Default, Display, Clone, Copy, PartialEq, Eq, FromPrimitive, ToPrimitive, FromSql, ToSql,
)]
#[repr(i8)]
pub enum VideochatType {
    /// Unknown type.
    #[default]
    Unknown = 0,

    /// [basicWebRTC](https://github.com/cracker0dks/basicwebrtc) instance.
    BasicWebrtc = 1,

    /// [Jitsi Meet](https://jitsi.org/jitsi-meet/) instance.
    Jitsi = 2,
}

pub const DC_HANDSHAKE_CONTINUE_NORMAL_PROCESSING: i32 = 0x01;
pub const DC_HANDSHAKE_STOP_NORMAL_PROCESSING: i32 = 0x02;
pub const DC_HANDSHAKE_ADD_DELETE_JOB: i32 = 0x04;

pub(crate) const DC_FROM_HANDSHAKE: i32 = 0x01;

pub const DC_GCL_ARCHIVED_ONLY: usize = 0x01;
pub const DC_GCL_NO_SPECIALS: usize = 0x02;
pub const DC_GCL_ADD_ALLDONE_HINT: usize = 0x04;
pub const DC_GCL_FOR_FORWARDING: usize = 0x08;

pub const DC_GCL_VERIFIED_ONLY: u32 = 0x01;
pub const DC_GCL_ADD_SELF: u32 = 0x02;

// unchanged user avatars are resent to the recipients every some days
pub(crate) const DC_RESEND_USER_AVATAR_DAYS: i64 = 14;

// warn about an outdated app after a given number of days.
// as we use the "provider-db generation date" as reference (that might not be updated very often)
// and as not all system get speedy updates,
// do not use too small value that will annoy users checking for nonexistent updates.
pub(crate) const DC_OUTDATED_WARNING_DAYS: i64 = 365;

/// messages that should be deleted get this chat_id; the messages are deleted from the working thread later then. This is also needed as rfc724_mid should be preset as long as the message is not deleted on the server (otherwise it is downloaded again)
pub const DC_CHAT_ID_TRASH: ChatId = ChatId::new(3);
/// only an indicator in a chatlist
pub const DC_CHAT_ID_ARCHIVED_LINK: ChatId = ChatId::new(6);
/// only an indicator in a chatlist
pub const DC_CHAT_ID_ALLDONE_HINT: ChatId = ChatId::new(7);
/// larger chat IDs are "real" chats, their messages are "real" messages.
pub const DC_CHAT_ID_LAST_SPECIAL: ChatId = ChatId::new(9);

/// Chat type.
#[derive(
    Debug,
    Display,
    Clone,
    Copy,
    PartialEq,
    Eq,
    FromPrimitive,
    ToPrimitive,
    FromSql,
    ToSql,
    IntoStaticStr,
    Serialize,
    Deserialize,
)]
#[repr(u32)]
pub enum Chattype {
    /// 1:1 chat.
    Single = 100,

    /// Group chat.
    Group = 120,

    /// Mailing list.
    Mailinglist = 140,

    /// Broadcast list.
    Broadcast = 160,
}

pub const DC_MSG_ID_DAYMARKER: u32 = 9;
pub const DC_MSG_ID_LAST_SPECIAL: u32 = 9;

/// String that indicates that something is left out or truncated.
pub(crate) const DC_ELLIPSIS: &str = "[...]";
// how many lines desktop can display when fullscreen (fullscreen at zoomlevel 1x)
// (taken from "subjective" testing what looks ok)
pub const DC_DESIRED_TEXT_LINES: usize = 38;
// how many chars desktop can display per line (from "subjective" testing)
pub const DC_DESIRED_TEXT_LINE_LEN: usize = 100;

/// Message length limit.
///
/// To keep bubbles and chat flow usable and to avoid problems with controls using very long texts,
/// we limit the text length to `DC_DESIRED_TEXT_LEN`.  If the text is longer, the full text can be
/// retrieved using has_html()/get_html().
///
/// Note that for simplicity maximum length is defined as the number of Unicode Scalar Values (Rust
/// `char`s), not Unicode Grapheme Clusters.
pub const DC_DESIRED_TEXT_LEN: usize = DC_DESIRED_TEXT_LINE_LEN * DC_DESIRED_TEXT_LINES;

// Flags for configuring IMAP and SMTP servers.
// These flags are optional
// and may be set together with the username, password etc.
// via dc_set_config() using the key "server_flags".

/// Force OAuth2 authorization. This flag does not skip automatic configuration.
/// Before calling configure() with DC_LP_AUTH_OAUTH2 set,
/// the user has to confirm access at the URL returned by dc_get_oauth2_url().
pub const DC_LP_AUTH_OAUTH2: i32 = 0x2;

/// Force NORMAL authorization, this is the default.
/// If this flag is set, automatic configuration is skipped.
pub const DC_LP_AUTH_NORMAL: i32 = 0x4;

/// if none of these flags are set, the default is chosen
pub const DC_LP_AUTH_FLAGS: i32 = DC_LP_AUTH_OAUTH2 | DC_LP_AUTH_NORMAL;

/// How many existing messages shall be fetched after configuration.
pub(crate) const DC_FETCH_EXISTING_MSGS_COUNT: i64 = 100;

// max. weight of images to send w/o recoding
pub const BALANCED_IMAGE_BYTES: usize = 500_000;
pub const WORSE_IMAGE_BYTES: usize = 130_000;

// max. width/height of an avatar
pub(crate) const BALANCED_AVATAR_SIZE: u32 = 256;
pub(crate) const WORSE_AVATAR_SIZE: u32 = 128;

// max. width/height of images scaled down because of being too huge
pub const BALANCED_IMAGE_SIZE: u32 = 1280;
pub const WORSE_IMAGE_SIZE: u32 = 640;

// Key for the folder configuration version (see below).
pub(crate) const DC_FOLDERS_CONFIGURED_KEY: &str = "folders_configured";
// this value can be increased if the folder configuration is changed and must be redone on next program start
pub(crate) const DC_FOLDERS_CONFIGURED_VERSION: i32 = 4;

// If more recipients are needed in SMTP's `RCPT TO:` header, the recipient list is split into
// chunks. This does not affect MIME's `To:` header. Can be overwritten by setting
// `max_smtp_rcpt_to` in the provider db.
pub(crate) const DEFAULT_MAX_SMTP_RCPT_TO: usize = 50;

/// How far the last quota check needs to be in the past to be checked by the background function (in seconds).
pub(crate) const DC_BACKGROUND_FETCH_QUOTA_CHECK_RATELIMIT: u64 = 12 * 60 * 60; // 12 hours

#[cfg(test)]
mod tests {
    use num_traits::FromPrimitive;

    use super::*;

    #[test]
    fn test_chattype_values() {
        // values may be written to disk and must not change
        assert_eq!(Chattype::Single, Chattype::from_i32(100).unwrap());
        assert_eq!(Chattype::Group, Chattype::from_i32(120).unwrap());
        assert_eq!(Chattype::Mailinglist, Chattype::from_i32(140).unwrap());
        assert_eq!(Chattype::Broadcast, Chattype::from_i32(160).unwrap());
    }

    #[test]
    fn test_keygentype_values() {
        // values may be written to disk and must not change
        assert_eq!(KeyGenType::Default, KeyGenType::default());
        assert_eq!(KeyGenType::Default, KeyGenType::from_i32(0).unwrap());
        assert_eq!(KeyGenType::Rsa2048, KeyGenType::from_i32(1).unwrap());
        assert_eq!(KeyGenType::Ed25519, KeyGenType::from_i32(2).unwrap());
        assert_eq!(KeyGenType::Rsa4096, KeyGenType::from_i32(3).unwrap());
    }

    #[test]
    fn test_showemails_values() {
        // values may be written to disk and must not change
        assert_eq!(ShowEmails::All, ShowEmails::default());
        assert_eq!(ShowEmails::Off, ShowEmails::from_i32(0).unwrap());
        assert_eq!(
            ShowEmails::AcceptedContacts,
            ShowEmails::from_i32(1).unwrap()
        );
        assert_eq!(ShowEmails::All, ShowEmails::from_i32(2).unwrap());
    }

    #[test]
    fn test_blocked_values() {
        // values may be written to disk and must not change
        assert_eq!(Blocked::Not, Blocked::default());
        assert_eq!(Blocked::Not, Blocked::from_i32(0).unwrap());
        assert_eq!(Blocked::Yes, Blocked::from_i32(1).unwrap());
        assert_eq!(Blocked::Request, Blocked::from_i32(2).unwrap());
    }

    #[test]
    fn test_mediaquality_values() {
        // values may be written to disk and must not change
        assert_eq!(MediaQuality::Balanced, MediaQuality::default());
        assert_eq!(MediaQuality::Balanced, MediaQuality::from_i32(0).unwrap());
        assert_eq!(MediaQuality::Worse, MediaQuality::from_i32(1).unwrap());
    }

    #[test]
    fn test_videochattype_values() {
        // values may be written to disk and must not change
        assert_eq!(VideochatType::Unknown, VideochatType::default());
        assert_eq!(VideochatType::Unknown, VideochatType::from_i32(0).unwrap());
        assert_eq!(
            VideochatType::BasicWebrtc,
            VideochatType::from_i32(1).unwrap()
        );
        assert_eq!(VideochatType::Jitsi, VideochatType::from_i32(2).unwrap());
    }
}