vsix 1.0.2

A command-line utility that downloads and installs .vsix extensions into Visual Studio Code and Cursor
Documentation 
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use crate::domain::{DomainError, ExtensionRepository, InstallationRepository, SearchResult};

pub struct SearchExtensionUseCase<R: ExtensionRepository> {
    repository: R,
}

impl<R: ExtensionRepository> SearchExtensionUseCase<R> {
    pub fn new(repository: R) -> Self {
        Self { repository }
    }

    /// Executes the search use case
    ///
    /// # Errors
    ///
    /// Returns an error if the query is empty or if the search fails
    pub async fn execute(
        &self,
        query: &str,
        marketplace_url: Option<&str>,
    ) -> Result<SearchResult, DomainError> {
        if query.trim().is_empty() {
            return Err(DomainError::ParseError(
                "Search query cannot be empty".to_string(),
            ));
        }

        self.repository.search(query, marketplace_url).await
    }
}

pub struct InstallExtensionUseCase<E: ExtensionRepository, I: InstallationRepository> {
    extension_repo: E,
    installation_repo: I,
}

impl<E: ExtensionRepository, I: InstallationRepository> InstallExtensionUseCase<E, I> {
    pub fn new(extension_repo: E, installation_repo: I) -> Self {
        Self {
            extension_repo,
            installation_repo,
        }
    }

    /// Executes the install use case
    ///
    /// # Errors
    ///
    /// Returns an error if the extension ID is invalid, extension not found, or installation fails
    pub async fn execute(
        &self,
        extension_id: &str,
        use_cursor: bool,
        marketplace_url: Option<&str>,
    ) -> Result<(), DomainError> {
        let parts: Vec<&str> = extension_id.split('.').collect();
        if parts.len() != 2 {
            return Err(DomainError::InvalidExtensionFormat(
                "Extension ID must be in format 'publisher.name'".to_string(),
            ));
        }

        let extension = self
            .extension_repo
            .get_extension(extension_id, marketplace_url)
            .await?;

        // Most extensions are platform-agnostic, so we don't specify a platform
        // Some extensions support platform-specific downloads, but the API returns 500 for those that don't
        let vsix_data = self.extension_repo.download(&extension, None).await?;

        if use_cursor {
            self.installation_repo
                .install_cursor(&vsix_data, &extension.unique_identifier())
                .await
        } else {
            self.installation_repo
                .install_vscode(&vsix_data, &extension.unique_identifier())
                .await
        }
    }
}

#[cfg(test)]
mod tests {
    use super::*;
    use crate::domain::Extension;
    use async_trait::async_trait;

    struct MockExtensionRepo {
        search_result: Option<SearchResult>,
        should_fail: bool,
    }

    #[async_trait]
    impl ExtensionRepository for MockExtensionRepo {
        async fn search(
            &self,
            _query: &str,
            _marketplace_url: Option<&str>,
        ) -> Result<SearchResult, DomainError> {
            if self.should_fail {
                Err(DomainError::NetworkError("Mock error".to_string()))
            } else {
                Ok(self.search_result.clone().unwrap_or(SearchResult {
                    extensions: vec![],
                    total_count: 0,
                }))
            }
        }

        async fn get_extension(
            &self,
            _id: &str,
            _marketplace_url: Option<&str>,
        ) -> Result<Extension, DomainError> {
            unimplemented!()
        }

        async fn download(
            &self,
            _extension: &Extension,
            _target_platform: Option<&str>,
        ) -> Result<Vec<u8>, DomainError> {
            unimplemented!()
        }
    }

    #[tokio::test]
    async fn test_search_use_case_with_empty_query() {
        let repo = MockExtensionRepo {
            search_result: None,
            should_fail: false,
        };
        let use_case = SearchExtensionUseCase::new(repo);

        let result = use_case.execute("", None).await;
        assert!(result.is_err());

        match result {
            Err(DomainError::ParseError(msg)) => {
                assert_eq!(msg, "Search query cannot be empty");
            }
            _ => panic!("Expected ParseError"),
        }
    }

    #[tokio::test]
    async fn test_search_use_case_success() {
        let expected_result = SearchResult {
            extensions: vec![Extension {
                id: "1".to_string(),
                name: "python".to_string(),
                publisher: "ms-python".to_string(),
                version: "1.0.0".to_string(),
                display_name: "Python".to_string(),
                description: Some("Python support".to_string()),
                downloads: 1000,
            }],
            total_count: 1,
        };

        let repo = MockExtensionRepo {
            search_result: Some(expected_result.clone()),
            should_fail: false,
        };
        let use_case = SearchExtensionUseCase::new(repo);

        let result = use_case.execute("python", None).await.unwrap();
        assert_eq!(result.extensions.len(), 1);
        assert_eq!(result.extensions[0].name, "python");
    }
}