247 lines
8.1 KiB
Rust
247 lines
8.1 KiB
Rust
//! ## ThemeProvider
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//!
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//! `theme_provider` is the module which provides an API between the theme configuration and the system
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/**
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* MIT License
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*
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* termscp - Copyright (c) 2021 Christian Visintin
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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// Locals
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use crate::config::{
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serialization::{deserialize, serialize, SerializerError, SerializerErrorKind},
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themes::Theme,
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};
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// Ext
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use std::fs::OpenOptions;
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use std::path::{Path, PathBuf};
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use std::string::ToString;
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/// ## ThemeProvider
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///
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/// ThemeProvider provides a high level API to communicate with the termscp theme
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pub struct ThemeProvider {
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theme: Theme, // Theme loaded
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theme_path: PathBuf, // Theme TOML Path
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degraded: bool, // Fallback mode; won't work with file system
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}
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impl ThemeProvider {
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/// ### new
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///
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/// Instantiates a new `ThemeProvider`
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pub fn new(theme_path: &Path) -> Result<Self, SerializerError> {
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let default_theme: Theme = Theme::default();
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info!(
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"Setting up theme provider with thene path {} ",
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theme_path.display(),
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);
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// Create provider
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let mut provider: ThemeProvider = ThemeProvider {
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theme: default_theme,
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theme_path: theme_path.to_path_buf(),
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degraded: false,
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};
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// If Config file doesn't exist, create it
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if !theme_path.exists() {
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if let Err(err) = provider.save() {
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error!("Couldn't write theme file: {}", err);
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return Err(err);
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}
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debug!("Theme file didn't exist; created file");
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} else {
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// otherwise Load configuration from file
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if let Err(err) = provider.load() {
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error!("Couldn't read thene file: {}", err);
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return Err(err);
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}
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debug!("Read theme file");
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}
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Ok(provider)
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}
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/// ### degraded
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///
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/// Create a new theme provider which won't work with file system.
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/// This is done in order to prevent a lot of `unwrap_or` on Ui
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pub fn degraded() -> Self {
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Self {
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theme: Theme::default(),
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theme_path: PathBuf::default(),
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degraded: true,
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}
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}
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// -- getters
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/// ### theme
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///
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/// Returns theme as reference
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pub fn theme(&self) -> &Theme {
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&self.theme
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}
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/// ### theme_mut
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///
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/// Returns a mutable reference to the theme
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pub fn theme_mut(&mut self) -> &mut Theme {
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&mut self.theme
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}
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// -- io
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/// ### load
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///
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/// Load theme from file
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pub fn load(&mut self) -> Result<(), SerializerError> {
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if self.degraded {
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warn!("Configuration won't be loaded, since degraded; reloading default...");
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self.theme = Theme::default();
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return Err(SerializerError::new_ex(
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SerializerErrorKind::Generic,
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String::from("Can't access theme file"),
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));
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}
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// Open theme file for read
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debug!("Loading theme from file...");
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match OpenOptions::new()
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.read(true)
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.open(self.theme_path.as_path())
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{
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Ok(reader) => {
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// Deserialize
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match deserialize(Box::new(reader)) {
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Ok(theme) => {
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self.theme = theme;
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Ok(())
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}
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Err(err) => Err(err),
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}
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}
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Err(err) => {
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error!("Failed to read theme: {}", err);
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Err(SerializerError::new_ex(
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SerializerErrorKind::Io,
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err.to_string(),
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))
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}
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}
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}
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/// ### save
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///
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/// Save theme to file
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pub fn save(&self) -> Result<(), SerializerError> {
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if self.degraded {
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warn!("Configuration won't be saved, since in degraded mode");
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return Err(SerializerError::new_ex(
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SerializerErrorKind::Generic,
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String::from("Can't access theme file"),
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));
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}
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// Open file
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debug!("Writing theme");
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match OpenOptions::new()
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.create(true)
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.write(true)
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.truncate(true)
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.open(self.theme_path.as_path())
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{
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Ok(writer) => serialize(self.theme(), Box::new(writer)),
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Err(err) => {
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error!("Failed to write theme: {}", err);
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Err(SerializerError::new_ex(
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SerializerErrorKind::Io,
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err.to_string(),
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))
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}
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}
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}
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}
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#[cfg(test)]
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mod test {
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use super::*;
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use pretty_assertions::assert_eq;
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use tempfile::TempDir;
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use tuirealm::tui::style::Color;
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#[test]
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fn test_system_theme_provider_new() {
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let tmp_dir: tempfile::TempDir = TempDir::new().ok().unwrap();
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let theme_path: PathBuf = get_theme_path(tmp_dir.path());
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// Initialize a new bookmarks client
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let mut provider: ThemeProvider = ThemeProvider::new(theme_path.as_path()).unwrap();
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// Verify client
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assert_eq!(provider.theme().auth_address, Color::Yellow);
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assert_eq!(provider.theme_path, theme_path);
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assert_eq!(provider.degraded, false);
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// Mutation
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provider.theme_mut().auth_address = Color::Green;
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assert_eq!(provider.theme().auth_address, Color::Green);
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}
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#[test]
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fn test_system_theme_provider_load_and_save() {
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let tmp_dir: tempfile::TempDir = TempDir::new().ok().unwrap();
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let theme_path: PathBuf = get_theme_path(tmp_dir.path());
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// Initialize a new bookmarks client
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let mut provider: ThemeProvider = ThemeProvider::new(theme_path.as_path()).unwrap();
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// Write
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provider.theme_mut().auth_address = Color::Green;
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assert!(provider.save().is_ok());
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provider.theme_mut().auth_address = Color::Blue;
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// Reload
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assert!(provider.load().is_ok());
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// Unchanged
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assert_eq!(provider.theme().auth_address, Color::Green);
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// Instantiate a new provider
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let provider: ThemeProvider = ThemeProvider::new(theme_path.as_path()).unwrap();
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assert_eq!(provider.theme().auth_address, Color::Green); // Unchanged
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}
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#[test]
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fn test_system_theme_provider_degraded() {
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let mut provider: ThemeProvider = ThemeProvider::degraded();
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assert_eq!(provider.theme().auth_address, Color::Yellow);
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assert_eq!(provider.degraded, true);
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provider.theme_mut().auth_address = Color::Green;
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assert!(provider.load().is_err());
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assert_eq!(provider.theme().auth_address, Color::Yellow);
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assert!(provider.save().is_err());
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}
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#[test]
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fn test_system_theme_provider_err() {
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assert!(ThemeProvider::new(Path::new("/tmp/oifoif/omar")).is_err());
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}
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/// ### get_theme_path
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///
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/// Get paths for theme file
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fn get_theme_path(dir: &Path) -> PathBuf {
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let mut p: PathBuf = PathBuf::from(dir);
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p.push("theme.toml");
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p
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}
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}
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