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-rw-r--r--src/meta.rs162
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diff --git a/src/meta.rs b/src/meta.rs
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-// This file is part of Germ <https://github.com/gemrest/germ>.
-// Copyright (C) 2022-2022 Fuwn <[email protected]>
-//
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, version 3.
-//
-// This program is distributed in the hope that it will be useful, but
-// WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-// General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program. If not, see <http://www.gnu.org/licenses/>.
-//
-// Copyright (C) 2022-2022 Fuwn <[email protected]>
-// SPDX-License-Identifier: GPL-3.0-only
-
-use std::collections::HashMap;
-
-/// Structure-ize a Gemini response's meta section into it's mime type and it's
-/// parameters.
-#[derive(Debug, Default)]
-pub struct Meta {
- /// The mime type of a Gemini response
- mime: String,
- /// The parameters of a Gemini response
- parameters: HashMap<String, String>,
-}
-impl ToString for Meta {
- /// Convert a `Meta` into a `String`
- ///
- /// # Example
- /// ```rust
- /// let original_string = "text/gemini; hi=2; hi2=string=2";
- ///
- /// assert_eq!(
- /// germ::meta::Meta::from_string(original_string).to_string(),
- /// original_string
- /// );
- /// ```
- fn to_string(&self) -> String {
- format!("{}{}", self.mime, {
- let mut parameters = self
- .parameters
- .iter()
- .map(|(k, v)| format!("{}={}", *k, v))
- .collect::<Vec<_>>();
-
- parameters.sort();
- parameters.reverse();
-
- if parameters.is_empty() {
- "".to_string()
- } else {
- format!("; {}", parameters.join("; "))
- }
- })
- }
-}
-impl Meta {
- /// Create a new `Meta`
- ///
- /// # Example
- ///
- /// ```rust
- /// let mut meta = germ::meta::Meta::new();
- /// ```
- #[must_use]
- pub fn new() -> Self { Self::default() }
-
- /// Create a `Meta` from a string
- ///
- /// # Example
- ///
- /// ```rust
- /// assert_eq!(
- /// germ::meta::Meta::from_string("text/gemini; hi=2; hi2=string=2").mime(),
- /// "text/gemini",
- /// );
- /// ```
- #[must_use]
- pub fn from_string(meta: &str) -> Self {
- let mut metas = meta.split(';');
- let mime = metas.next().unwrap_or("").to_string();
- let mut parameters = HashMap::new();
-
- for parameter in metas {
- let key_value = parameter
- .trim_start()
- .split_at(parameter.find('=').unwrap_or(0));
-
- parameters.insert(
- key_value.0.to_string().replace('=', ""),
- key_value.1.to_string(),
- );
- }
-
- Self {
- mime,
- parameters,
- }
- }
-
- /// Obtain non-mutable access to the mime of the `Meta`
- ///
- /// # Example
- ///
- /// ```rust
- /// assert_eq!(
- /// germ::meta::Meta::from_string("text/gemini; hi=2; hi2=string=2").mime(),
- /// "text/gemini",
- /// );
- /// ```
- #[must_use]
- pub fn mime(&self) -> &str { &self.mime }
-
- /// Obtain mutable access to the mime of the `Meta`
- ///
- /// # Example
- ///
- /// ```rust
- /// let mut meta = germ::meta::Meta::new();
- ///
- /// *meta.mime_mut() = "text/gemini".to_string();
- /// ```
- pub fn mime_mut(&mut self) -> &mut String { &mut self.mime }
-
- /// Obtain non-mutable access to the parameters of the `Meta`
- ///
- /// # Example
- ///
- /// ```rust
- /// assert_eq!(
- /// germ::meta::Meta::from_string("text/gemini; hi=2; hi2=string=2")
- /// .parameters()
- /// .get("hi2"),
- /// Some(&"string=2".to_string()),
- /// );
- /// ```
- #[must_use]
- pub const fn parameters(&self) -> &HashMap<String, String> {
- &self.parameters
- }
-
- /// Obtain mutable access to the parameters of the `Meta`
- ///
- /// # Example
- ///
- /// ```rust
- /// let mut meta = germ::meta::Meta::new();
- /// let mut parameters = std::collections::HashMap::new();
- ///
- /// parameters.insert("hi".to_string(), "2".to_string());
- /// parameters.insert("hi2".to_string(), "string=2".to_string());
- ///
- /// *meta.parameters_mut() = parameters;
- /// ```
- pub fn parameters_mut(&mut self) -> &mut HashMap<String, String> {
- &mut self.parameters
- }
-}