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

use serde::{Deserialize, Serialize};

use crate::impl_from_contents;

pub mod actions;
pub mod context;
pub mod file;
pub mod image;
pub mod input;
pub mod section;

type ValidationResult = Result<(), validator::ValidationErrors>;

#[derive(Serialize, Deserialize, Debug)]
#[serde(tag = "type")]
pub enum Block {
    #[serde(rename = "section")]
    Section(section::Contents),

    /// # Divider Block
    ///
    /// _[slack api docs 🔗][divider_docs]_
    ///
    /// A content divider, like an `<hr>`,
    /// to split up different blocks inside of a message.
    ///
    /// The divider block is nice and neat, requiring no fields.
    ///
    /// [divider_docs]: https://api.slack.com/reference/block-kit/blocks#divider
    #[serde(rename = "divider")]
    Divider,

    #[serde(rename = "image")]
    Image(image::Contents),

    #[serde(rename = "actions")]
    Actions(actions::Contents),

    #[serde(rename = "context")]
    Context(context::Contents),

    #[serde(rename = "input")]
    Input(input::Contents),

    #[serde(rename = "file")]
    File(file::Contents),
}

use std::fmt;

impl fmt::Display for Block {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        let kind = match self {
            Block::Section { .. } => "Section",
            Block::Divider => "Divider",
            Block::Image { .. } => "Image",
            Block::Actions { .. } => "Actions",
            Block::Context { .. } => "Context",
            Block::Input { .. } => "Input",
            Block::File { .. } => "File",
        };

        write!(f, "{}", kind)
    }
}

impl Block {
    pub fn validate(&self) -> ValidationResult {
        use Block::*;

        match self {
            Section(contents) => contents.validate(),
            Image(contents) => contents.validate(),
            Actions(contents) => contents.validate(),
            Context(contents) => contents.validate(),
            Input(contents) => contents.validate(),
            File(contents) => contents.validate(),
            other => todo!("validation not implemented for {}", other),
        }
    }
}

impl_from_contents!(Block, Section, section::Contents);
impl_from_contents!(Block, Image, image::Contents);
impl_from_contents!(Block, Actions, actions::Contents);
impl_from_contents!(Block, Context, context::Contents);
impl_from_contents!(Block, Input, input::Contents);
impl_from_contents!(Block, File, file::Contents);