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

/*!
# JSON Get Text

This is a library for getting text from JSON usually for internationalization.

## Example

```rust,ignore
#[macro_use] extern crate json_gettext;

let ctx = static_json_gettext_build!(
    "en_US";
    "en_US" => "langs/en_US.json",
    "zh_TW" => "langs/zh_TW.json"
).unwrap();

assert_eq!("Hello, world!", get_text!(ctx, "hello").unwrap());
assert_eq!("哈囉，世界！", get_text!(ctx, "zh_TW", "hello").unwrap());
```

## Rocket Support

This crate supports the Rocket framework. In order to reload changed json files instead of recompiling the program you have to enable the `rocket` feature for this crate.

```toml
[dependencies.json-gettext]
version = "*"
features = ["rocket"]
```

Then, use the `static_json_gettext_build_for_rocket` macro instead of the `static_json_gettext_build` macro to build a `JSONGetText`(`JSONGetTextManager`).

```rust,ignore
#[macro_use] extern crate json_gettext;

#[macro_use] extern crate rocket;

use rocket::State;
use rocket::response::Redirect;

use json_gettext::JSONGetTextManager;

#[get("/")]
fn index(ctx: &State<JSONGetTextManager>) -> Redirect {
    Redirect::temporary(uri!(hello(lang = ctx.get_default_key())))
}

#[get("/<lang>")]
fn hello(ctx: &State<JSONGetTextManager>, lang: String) -> String {
    format!("Ron: {}", get_text!(ctx, lang, "hello").unwrap().as_str().unwrap())
}

#[launch]
fn rocket() -> _ {
    rocket::build()
        .attach(static_json_gettext_build_for_rocket!(
            "en_US";
            "en_US" => "langs/en_US.json",
            "zh_TW" => "langs/zh_TW.json"
        ))
        .mount("/", routes![index, hello])
}
```

If you are not using the `release` profile, `JSONGetTextManager` can reload the json files automatically if needed.

## `unic-langid` Support

Since string comparison could be slow, the `language_region_pair` feature, the `language` feature or the `region` feature can be enabled to change key's type to `(Language, Option<Region>)`, `Language` or `Region` respectively where `Language` and `Region` structs are in the `unic-langid` crate.

In this case, the `key!` macro would be useful for generating a `Key` instance from a literal string.

For example,

```toml
[dependencies.json-gettext]
version = "*"
features = ["language_region_pair", "rocket"]
```

```rust,ignore
#[macro_use]
extern crate rocket;

#[macro_use]
extern crate rocket_accept_language;

#[macro_use]
extern crate json_gettext;

use rocket::State;

use rocket_accept_language::unic_langid::subtags::Language;
use rocket_accept_language::AcceptLanguage;

use json_gettext::{JSONGetTextManager, Key};

const LANGUAGE_EN: Language = language!("en");

#[get("/")]
fn index(ctx: &State<JSONGetTextManager>, accept_language: &AcceptLanguage) -> String {
    let (language, region) = accept_language.get_first_language_region().unwrap_or((LANGUAGE_EN, None));

    format!("Ron: {}", get_text!(ctx, Key(language, region), "hello").unwrap().as_str().unwrap())
}

#[launch]
fn rocket() -> _ {
    rocket::build()
        .attach(static_json_gettext_build_for_rocket!(
            key!("en");
            key!("en") => "langs/en_US.json",
            key!("zh_TW") => "langs/zh_TW.json",
        ))
        .mount("/", routes![index])
}
```
*/

pub extern crate serde_json;

#[cfg(feature = "langid")]
pub extern crate unic_langid;

#[doc(hidden)]
pub extern crate manifest_dir_macros;

mod json_get_text_build_errors;
mod macros;
mod value;

#[cfg(all(debug_assertions, feature = "rocket"))]
mod mutate;

#[cfg(feature = "langid")]
mod key_copy;

#[cfg(not(feature = "langid"))]
mod key_string;

pub use json_get_text_build_errors::*;
#[cfg(feature = "langid")]
pub use key_copy::*;
#[cfg(not(feature = "langid"))]
pub use key_string::*;
#[cfg(all(debug_assertions, feature = "rocket"))]
use mutate::DebuggableMutate;
#[cfg(any(feature = "language", feature = "region"))]
pub use unic_langid::parser::ParserError;
#[cfg(feature = "language_region_pair")]
pub use unic_langid::LanguageIdentifierError;
pub use value::*;