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

//! Defines all the structs needed to interact with the Rojo Serve API.

use std::{
    borrow::Cow,
    collections::{HashMap, HashSet},
};

use rbx_dom_weak::{RbxId, RbxValue};
use serde::{Deserialize, Serialize};

use crate::{
    session_id::SessionId,
    snapshot::{InstanceMetadata as RojoInstanceMetadata, InstanceWithMeta},
};

/// Server version to report over the API, not exposed outside this crate.
pub(crate) const SERVER_VERSION: &str = env!("CARGO_PKG_VERSION");

/// Current protocol version, which is required to match.
pub const PROTOCOL_VERSION: u64 = 3;

/// Message returned by Rojo API when a change has occurred.
#[derive(Debug, Serialize, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct SubscribeMessage<'a> {
    pub removed: Vec<RbxId>,
    pub added: HashMap<RbxId, Instance<'a>>,
    pub updated: Vec<InstanceUpdate>,
}

#[derive(Debug, Serialize, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct InstanceUpdate {
    pub id: RbxId,
    pub changed_name: Option<String>,
    pub changed_class_name: Option<String>,

    // TODO: Transform from HashMap<String, Option<_>> to something else, since
    // null will get lost when decoding from JSON in some languages.
    #[serde(default)]
    pub changed_properties: HashMap<String, Option<RbxValue>>,
    pub changed_metadata: Option<InstanceMetadata>,
}

#[derive(Debug, Serialize, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct InstanceMetadata {
    pub ignore_unknown_instances: bool,
}

impl InstanceMetadata {
    pub(crate) fn from_rojo_metadata(meta: &RojoInstanceMetadata) -> Self {
        Self {
            ignore_unknown_instances: meta.ignore_unknown_instances,
        }
    }
}

#[derive(Debug, Serialize, Deserialize)]
#[serde(rename_all = "PascalCase")]
pub struct Instance<'a> {
    pub id: RbxId,
    pub parent: Option<RbxId>,
    pub name: Cow<'a, str>,
    pub class_name: Cow<'a, str>,
    pub properties: Cow<'a, HashMap<String, RbxValue>>,
    pub children: Cow<'a, [RbxId]>,
    pub metadata: Option<InstanceMetadata>,
}

impl<'a> Instance<'a> {
    pub(crate) fn from_rojo_instance(source: InstanceWithMeta<'_>) -> Instance<'_> {
        Instance {
            id: source.id(),
            parent: source.parent(),
            name: Cow::Borrowed(source.name()),
            class_name: Cow::Borrowed(source.class_name()),
            properties: Cow::Borrowed(source.properties()),
            children: Cow::Borrowed(source.children()),
            metadata: Some(InstanceMetadata::from_rojo_metadata(source.metadata())),
        }
    }
}

/// Response body from /api/rojo
#[derive(Debug, Serialize, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct ServerInfoResponse {
    pub session_id: SessionId,
    pub server_version: String,
    pub protocol_version: u64,
    pub expected_place_ids: Option<HashSet<u64>>,
    pub root_instance_id: RbxId,
}

/// Response body from /api/read/{id}
#[derive(Debug, Serialize, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct ReadResponse<'a> {
    pub session_id: SessionId,
    pub message_cursor: u32,
    pub instances: HashMap<RbxId, Instance<'a>>,
}

#[derive(Debug, Serialize, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct WriteRequest {
    pub session_id: SessionId,
    pub removed: Vec<RbxId>,

    #[serde(default)]
    pub added: HashMap<RbxId, ()>,
    pub updated: Vec<InstanceUpdate>,
}

#[derive(Debug, Serialize, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct WriteResponse {
    pub session_id: SessionId,
}

/// Response body from /api/subscribe/{cursor}
#[derive(Debug, Serialize, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct SubscribeResponse<'a> {
    pub session_id: SessionId,
    pub message_cursor: u32,
    pub messages: Vec<SubscribeMessage<'a>>,
}

/// General response type returned from all Rojo routes
#[derive(Debug, Serialize, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct ErrorResponse {
    kind: ErrorResponseKind,
    details: String,
}

impl ErrorResponse {
    pub fn not_found<S: Into<String>>(details: S) -> Self {
        Self {
            kind: ErrorResponseKind::NotFound,
            details: details.into(),
        }
    }

    pub fn bad_request<S: Into<String>>(details: S) -> Self {
        Self {
            kind: ErrorResponseKind::BadRequest,
            details: details.into(),
        }
    }

    pub fn internal_error<S: Into<String>>(details: S) -> Self {
        Self {
            kind: ErrorResponseKind::InternalError,
            details: details.into(),
        }
    }
}

#[derive(Debug, Serialize, Deserialize)]
pub enum ErrorResponseKind {
    NotFound,
    BadRequest,
    InternalError,
}