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
|
extern crate serde_json;
#[derive(Clone)]
pub enum Event {
Deleted { user_id: String, twete_id: String },
RT_RT { user_id: String, twete_id: String },
Fav_RT { user_id: String, twete_id: String },
Fav { user_id: String, twete_id: String },
Unfav { user_id: String, twete_id: String },
Quoted { user_id: String, twete_id: String },
Followed { user_id: String },
Unfollowed { user_id: String }
}
impl Event {
fn get_source_id(structure: serde_json::Map<String, serde_json::Value>) -> Result<String, String> {
match structure.get("source").and_then(|x| x.get("id_str").and_then(|x| x.as_str())) {
Some(id) => Ok(id.to_string()),
None => Err("No id_str string at .source.id_str".to_string())
}
}
fn get_source_target_ids(structure: serde_json::Map<String, serde_json::Value>) -> Result<(String, String), String> {
match (
structure.get("source").and_then(|x| x.get("id_str").and_then(|x| x.as_str())),
structure.get("target_obj").and_then(|x| x.get("id_str").and_then(|x| x.as_str()))
) {
(Some(source_id), Some(target_id)) => Ok((source_id.to_string(), target_id.to_string())),
(None, Some(target_id)) => Err("No id_str string at .source.id_str".to_string()),
(Some(target_id), None) => Err("No id_str string at .target_object.id_str".to_string()),
(None, None) => Err("No id_str at source or target_object".to_string())
}
}
// maybe type error
// better? string is ok
// for now..
pub fn from_json(structure: serde_json::Map<String, serde_json::Value>) -> Result<Event, String> {
match structure.get("event").and_then(|x| x.as_str()).map(|x| x.to_owned()) {
Some(event) => {
let event_ref: &str = &event;
match event_ref {
"follow" =>
Event::get_source_id(structure)
.map(|id_str|
Event::Followed {
user_id: id_str
}
),
"unfollow" =>
Event::get_source_id(structure)
.map(|id_str|
Event::Unfollowed {
user_id: id_str
}
),
"favorite" =>
Event::get_source_target_ids(structure)
.map(|(source_id, target_id)|
Event::Fav {
user_id: source_id,
twete_id: target_id
}
),
"unfavorite" =>
Event::get_source_target_ids(structure)
.map(|(source_id, target_id)|
Event::Unfav {
user_id: source_id,
twete_id: target_id
}
),
"favorited_retweet" =>
Event::get_source_target_ids(structure)
.map(|(source_id, target_id)|
Event::Fav_RT {
user_id: source_id,
twete_id: target_id
}
),
"retweeted_retweet" =>
Event::get_source_target_ids(structure)
.map(|(source_id, target_id)|
Event::RT_RT {
user_id: source_id,
twete_id: target_id
}
),
"quoted_tweet" =>
Event::get_source_target_ids(structure)
.map(|(source_id, target_id)|
Event::Quoted {
user_id: source_id,
twete_id: target_id
}
),
// "list_member_added" =>
// what about removed?
// "blocked" => Blocked { },
// "unblocked" => Unblocked { },
e => { println!("unrecognized event: {}", e); Err(e.to_string()) }
}
},
None => {
Err("No event in event json...".to_string())
}
}
}
}
|
