lingual 1.1.0

Free and Unlimited Language Translation (Google) API for Rust. Supports Async and Sync.
Documentation 
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use crate::{
    errors::{TranslationError, TranslationResult},
    langs::Lang,
};
use reqwest::Url;

use super::token;

/// FIXME: Why does https return 'invalid url, scheme is not http'?
pub(super) const BASE_URL: &str = "http://translate.googleapis.com";
pub(super) const SINGLE_TRANSLATE_URL: &str = "/translate_a/single";

pub fn generate_url(text: &str, src: &Lang, target: &Lang) -> TranslationResult<Url> {
    let token = token::generate_token(text)?;
    Url::parse_with_params(
        format!("{}{}", BASE_URL, SINGLE_TRANSLATE_URL).as_str(),
        &[
            ("client", "t"),
            ("sl", src.as_ref()),
            ("tl", target.as_ref()),
            ("hl", target.as_ref()),
            ("dt", "t"),
            ("ie", "UTF-8"),
            ("oe", "UTF-8"),
            ("otf", "1"),
            ("ssel", "0"),
            ("tsel", "0"),
            ("kc", "7"),
            ("tk", token.as_str()),
            ("q", text),
        ],
    )
    .map_err(|_| TranslationError::UrlParseErr(text.to_string()))
}