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// Take a look at the license at the top of the repository in the LICENSE file.
use crate::json::{
json_minifier::{keep_element, JsonMinifier},
read::json_read::JsonRead,
string::JsonMultiFilter,
};
use std::fmt;
use std::io::{self, Read};
mod read {
mod byte_to_char;
mod internal_buffer;
mod internal_reader;
pub mod json_read;
}
mod json_minifier;
mod string;
type JsonMethod = fn(&mut JsonMinifier, &char, Option<&char>) -> bool;
/// Minifies a given String by JSON minification rules
///
/// # Example
///
/// ```rust
/// use minifier::json::minify;
///
/// let json = r#"
/// {
/// "test": "test",
/// "test2": 2
/// }
/// "#.into();
/// let json_minified = minify(json);
/// assert_eq!(&json_minified.to_string(), r#"{"test":"test","test2":2}"#);
/// ```
#[inline]
pub fn minify(json: &str) -> Minified<'_> {
Minified(JsonMultiFilter::new(json.chars(), keep_element))
}
#[derive(Debug)]
pub struct Minified<'a>(JsonMultiFilter<'a, JsonMethod>);
impl<'a> Minified<'a> {
pub fn write<W: io::Write>(self, w: W) -> io::Result<()> {
self.0.write(w)
}
}
impl<'a> fmt::Display for Minified<'a> {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
self.0.fmt(f)
}
}
/// Minifies a given Read by JSON minification rules
///
/// # Example
///
/// ```rust
/// extern crate minifier;
/// use std::fs::File;
/// use std::io::Read;
/// use minifier::json::minify_from_read;
///
/// fn main() {
/// let mut html_minified = String::new();
/// let mut file = File::open("tests/files/test.json").expect("file not found");
/// minify_from_read(file).read_to_string(&mut html_minified);
/// }
/// ```
#[inline]
pub fn minify_from_read<R: Read>(json: R) -> JsonRead<JsonMethod, R> {
JsonRead::new(json, keep_element)
}
#[test]
fn removal_from_read() {
use std::fs::File;
let input = File::open("tests/files/test.json").expect("file not found");
let expected: String = "{\"test\":\"\\\" test2\",\"test2\":\"\",\"test3\":\" \"}".into();
let mut actual = String::new();
minify_from_read(input)
.read_to_string(&mut actual)
.expect("error at read");
assert_eq!(actual, expected);
}
#[test]
fn removal_of_control_characters() {
let input = "\n".into();
let expected: String = "".into();
let actual = minify(input);
assert_eq!(actual.to_string(), expected);
}
#[test]
fn removal_of_whitespace_outside_of_tags() {
let input = r#"
{
"test": "\" test2",
"test2": "",
"test3": " "
}
"#
.into();
let expected: String = "{\"test\":\"\\\" test2\",\"test2\":\"\",\"test3\":\" \"}".into();
let actual = minify(input);
assert_eq!(actual.to_string(), expected);
}
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