### Get Detailed Mod Information (Rust)

Source: https://context7.com/void-mod-manager/lib-vmm/llms.txt

This function retrieves detailed information for a specific mod using its ID. It utilizes a helper method on the `Context` object to fetch extended mod details, including version, installation status, and image URLs. This requires an active game context and the mod's unique identifier.

```rust
use lib_vmm::runtime::context::Context;
use std::sync::Arc;

// Get detailed mod information
async fn get_mod_details(context: Arc<Context>, mod_id: &str) {
    let provider_id = context.active_game_required_provider()
        .expect("No active game");

    // Use context helper
    let extended = context.get_extended_info(mod_id).await
        .expect("Failed to get mod details");

    println!("Version: {}", extended.version);
    println!("Installed: {}", extended.installed);
    println!("Header: {}", extended.header_image);
    println!("Screenshots: {}", extended.carousel_images.len());
}
```

--------------------------------

### Custom Game Provider Implementation in Rust

Source: https://context7.com/void-mod-manager/lib-vmm/llms.txt

Defines a `CustomGameProvider` struct and implements the `Provider` and `GameProvider` traits. This allows integration with a custom game, handling mod installation by extracting ZIP archives and determining the root directory. It includes methods for defining game metadata and provider-specific details.

```rust
pub struct CustomGameProvider {
    game_id: String,
    mod_provider_id: String,
    install_path: PathBuf,
}

impl CustomGameProvider {
    pub fn new(game_id: &str, mod_provider_id: &str, install_path: PathBuf) -> Self {
        Self {
            game_id: game_id.to_string(),
            mod_provider_id: mod_provider_id.to_string(),
            install_path,
        }
    }
}

impl Provider for CustomGameProvider {
    fn id(&self) -> &'static str {
        "custom-game"
    }

    fn capabilities(&self) -> &[CapabilityRef] {
        &[]
    }
}

#[async_trait]
impl GameProvider for CustomGameProvider {
    fn mod_provider_id(&self) -> &str { &self.mod_provider_id }

    fn metadata(&self) -> GameMetadata {
        GameMetadata {
            id: self.game_id.clone(),
            display_name: "My Custom Game".to_string(),
            short_name: "MCG".to_string(),
            icon: GameIcon::Path("/icons/custom.png".to_string()),
            provider_source: ProviderSource::Plugin("custom-plugin".to_string()),
        }
    }

    fn get_external_id(&self) -> &str { "custom-12345" }

    fn install_mod(&self, path: &Path) -> Result<(), GameInstallError> {
        let data_dir = self.install_path.join("Data");
        let info = extract_zip(path, &data_dir)
            .map_err(|_| GameInstallError::InvalidArchive)?;
        let _root = determine_root_dir(&info, &data_dir);
        Ok(())
    }
}
```

--------------------------------

### Async HTTP Client with JSON Support (Rust)

Source: https://context7.com/void-mod-manager/lib-vmm/llms.txt

Demonstrates using the `ReqwestProviderHttpClient` to fetch data from an API. It shows how to deserialize the response into a typed struct (`ModApiResponse`) and also how to fetch raw JSON (`serde_json::Value`) for dynamic parsing. Includes examples for fetching mod information and raw JSON content.

```rust
use lib_vmm::net::{ReqwestProviderHttpClient, ProviderHttpClient, HttpError};
use serde::{Deserialize, Serialize};

#[derive(Debug, Deserialize)]
struct ModApiResponse {
    id: String,
    name: String,
    downloads: u64,
    files: Vec<ModFile>,
}

#[derive(Debug, Deserialize)]
struct ModFile {
    id: u64,
    name: String,
    version: String,
    download_url: String,
}

async fn fetch_mod_info(mod_id: &str) -> Result<ModApiResponse, HttpError> {
    let client = ReqwestProviderHttpClient::new();

    // Get typed response
    let url = format!("https://api.nexusmods.com/v1/mods/{}", mod_id);
    let response: ModApiResponse = client.get_typed(&url).await?;

    println!("Mod: {} ({})", response.name, response.id);
    println!("Downloads: {}", response.downloads);
    for file in &response.files {
        println!("  File: {} v{}", file.name, file.version);
    }

    Ok(response)
}

async fn fetch_raw_json(url: &str) -> Result<serde_json::Value, HttpError> {
    let client = ReqwestProviderHttpClient::new();

    // Get raw JSON for flexible parsing
    let json = client.get_json(url).await?;

    // Access fields dynamically
    if let Some(name) = json["name"].as_str() {
        println!("Name: {}", name);
    }

    Ok(json)
}

// Error handling example
async fn fetch_with_error_handling(url: &str) {
    let client = ReqwestProviderHttpClient::new();

    match client.get_json(url).await {
        Ok(json) => println!("Success: {:?}", json),
        Err(HttpError::Network(msg)) => eprintln!("Network error: {}", msg),
        Err(HttpError::Parse(msg)) => eprintln!("Parse error: {}", msg),
        Err(HttpError::Schema(msg)) => eprintln!("Schema mismatch: {}", msg),
        Err(HttpError::Internal(msg)) => eprintln!("Internal error: {}", msg),
    }
}

```

--------------------------------

### Define Skyrim Game Provider Interface (Rust)

Source: https://context7.com/void-mod-manager/lib-vmm/llms.txt

Implements the GameProvider trait for Skyrim, defining metadata, external IDs, and mod installation logic. It uses async_trait for asynchronous operations and handles mod extraction via zip archives. The provider extends the base Provider trait for common functionalities.

```rust
use async_trait::async_trait;
use std::path::Path;
use std::sync::Arc;
use lib_vmm::traits::game_provider::{GameProvider, GameMetadata, GameIcon, GameInstallError};
use lib_vmm::traits::provider::Provider;
use lib_vmm::registry::model::ProviderSource;
use lib_vmm::archive::{extract_zip, determine_root_dir};
use lib_vmm::capabilities::base::CapabilityRef;

pub struct SkyrimProvider {
    mod_provider_id: String,
    game_path: std::path::PathBuf,
}

impl SkyrimProvider {
    pub fn new(mod_provider_id: String, game_path: std::path::PathBuf) -> Self {
        Self { mod_provider_id, game_path }
    }
}

impl Provider for SkyrimProvider {
    fn id(&self) -> &'static str {
        "skyrim-se"
    }

    fn capabilities(&self) -> &[CapabilityRef] {
        &[]  // Game providers can also have capabilities
    }
}

#[async_trait]
impl GameProvider for SkyrimProvider {
    fn mod_provider_id(&self) -> &str {
        &self.mod_provider_id
    }

    fn metadata(&self) -> GameMetadata {
        GameMetadata {
            id: "skyrim-se".into(),
            display_name: "The Elder Scrolls V: Skyrim Special Edition".into(),
            short_name: "Skyrim SE".into(),
            icon: GameIcon::Path("/icons/skyrim.png".into()),
            provider_source: ProviderSource::Plugin("skyrim-plugin".into())
        }
    }

    fn get_external_id(&self) -> &str {
        "489830" // Steam App ID
    }

    fn install_mod(&self, path: &Path) -> Result<(), GameInstallError> {
        // Extract mod archive
        let data_dir = self.game_path.join("Data");
        let info = extract_zip(path, &data_dir)
            .map_err(|_| GameInstallError::InvalidArchive)?;

        // Determine actual root directory (handles single-folder archives)
        let root = determine_root_dir(&info, &data_dir);
        println!("Mod installed to: {:?}", root);
        println!("Files extracted: {}", info.total_files);
        println!("DLL files: {}", info.count_ext("dll"));

        Ok(())
    }
}

```

--------------------------------

### Plugin Initialization and Main Function in Rust

Source: https://context7.com/void-mod-manager/lib-vmm/llms.txt

Demonstrates the initialization of a plugin context and the main application logic. It includes registering custom mod and game providers, activating a game, and performing a mod discovery query using the configured context. This showcases the runtime usage of the lib-vmm SDK.

```rust
// Plugin initialization function
pub fn create_plugin_context() -> Arc<Context> {
    let mut builder = ContextBuilder::new();

    // Register mod provider
    let mod_provider = Arc::new(CustomModProvider::new("custom-mods"));
    builder.register_mod_provider(
        "custom-mods",
        mod_provider,
        ProviderSource::Plugin("custom-plugin".to_string())
    ).expect("Failed to register mod provider");

    // Register game provider
    let game_provider = Arc::new(CustomGameProvider::new(
        "custom-game",
        "custom-mods",
        PathBuf::from("/games/custom")
    ));
    builder.register_game_provider(
        game_provider,
        ProviderSource::Plugin("custom-plugin".to_string())
    ).expect("Failed to register game provider");

    Arc::new(builder.freeze())
}

#[tokio::main]
async fn main() {
    // Initialize plugin
    let context = create_plugin_context();

    // Activate game
    context.activate_game("custom-game").unwrap();
    println!("Active game: {:?}", context.active_game());

    // Discover mods
    let provider = context.get_mod_provider("custom-mods").unwrap();
    let query = DiscoveryQuery {
        game_id: "custom-game".to_string(),
        page: Some(1),
        page_size: Some(10),
        search: None,
        tags: None,
        sort: Some(SortOrder::Downloads),
    };

    match provider.discover(&query).await {
        Ok(results) => println!("Found {} mods", results.mods.len()),
        Err(e) => eprintln!("Discovery error: {}", e),
    }
}
```

--------------------------------

### Rust: Runtime Usage of Provider Capabilities

Source: https://context7.com/void-mod-manager/lib-vmm/llms.txt

This Rust code snippet shows how to interact with provider capabilities at runtime. It demonstrates finding a capability by its ID and retrieving a specific capability type (e.g., `ApiKeyCapability`) to check if a prompt is needed and to render the associated form.

```rust
// Use capabilities at runtime
async fn check_capabilities(provider: &Arc<dyn Provider>) {
    // Find capability by ID
    if let Some(cap) = provider.find_capability("vmm.mod.requires_api_key") {
        println!("Provider requires API key");
    }

    // Get concrete capability type
    use lib_vmm::capabilities::api_key_capability::ApiKeyCapability;
    if let Some(api_key_cap) = provider.get::<ApiKeyCapability<MyModProvider>>() {
        if api_key_cap.needs_prompt(None) {
            let schema = api_key_cap.render().unwrap();
            println!("Show form: {}", schema.title);
        }
    }
}

```

--------------------------------

### Discover Mods with Filtering and Sorting (Rust)

Source: https://context7.com/void-mod-manager/lib-vmm/llms.txt

This snippet demonstrates how to use the Discovery System to search for mods. It shows how to set up a DiscoveryQuery with parameters like game ID, search terms, tags, pagination, and sorting order, then performs the discovery and iterates over the results. It requires the `lib_vmm` crate and a `Context` object.

```rust
use lib_vmm::traits::discovery::{DiscoveryQuery, SortOrder};
use lib_vmm::runtime::context::Context;
use std::sync::Arc;

async fn discover_mods(context: Arc<Context>) {
    // Get active game's mod provider
    let provider_id = context.active_game_required_provider()
        .expect("No active game");
    let provider = context.get_mod_provider(&provider_id)
        .expect("Provider not found");

    // Build discovery query
    let query = DiscoveryQuery {
        game_id: "skyrim-se".to_string(),
        page: Some(1),
        page_size: Some(20),
        search: Some("graphics".to_string()),
        tags: Some(vec!["overhaul".to_string(), "textures".to_string()]),
        sort: Some(SortOrder::Downloads),
    };

    // Perform discovery
    match provider.discover(&query).await {
        Ok(result) => {
            println!("Found {} mods", result.mods.len());
            println!("Page {} of {}",
                result.meta.pagination.current,
                result.meta.pagination.total_pages.unwrap_or(0)
            );

            for mod_summary in result.mods {
                println!("\n{} ({})", mod_summary.name, mod_summary.id);
                println!("  {}", mod_summary.short_description);
                println!("  Downloads: {}, Likes: {}",
                    mod_summary.downloads,
                    mod_summary.likes
                );
                println!("  Tags: {}", mod_summary.tags.join(", "));
            }
        }
        Err(e) => eprintln!("Discovery failed: {}", e),
    }
}
```

--------------------------------

### Manage Providers with ContextBuilder (Rust)

Source: https://context7.com/void-mod-manager/lib-vmm/llms.txt

Demonstrates using ContextBuilder to register and manage mod and game providers. It shows how to register providers with specific IDs and sources, freeze the builder into an immutable context, and then use the context to activate games, retrieve providers, and list registered items. Dependencies are validated during registration.

```rust
use std::sync::Arc;
use lib_vmm::runtime::context::ContextBuilder;
use lib_vmm::registry::model::ProviderSource;
use lib_vmm::traits::mod_provider::ModProvider;
use lib_vmm::traits::game_provider::GameProvider;

// Build and freeze context
let mut builder = ContextBuilder::new();

// Register mod providers
let nexus = Arc::new(NexusModsProvider::new());
builder.register_mod_provider(
    "nexus-mods",
    nexus,
    ProviderSource::Plugin("my-plugin".into())
).expect("Failed to register mod provider");

// Register core provider with reserved 'core:' prefix
let steam_workshop = Arc::new(SteamWorkshopProvider::new());
builder.register_mod_provider(
    "core:steam-workshop",
    steam_workshop,
    ProviderSource::Core
).expect("Failed to register core provider");

// Register game (must reference existing mod provider)
let skyrim = Arc::new(SkyrimProvider::new(
    "nexus-mods".to_string(),
    PathBuf::from("/games/skyrim")
));
builder.register_game_provider(
    skyrim,
    ProviderSource::Plugin("skyrim-plugin".into())
).expect("Failed to register game");

// Freeze into immutable context
let context = Arc::new(builder.freeze());

// Use the context
context.activate_game("skyrim-se").expect("Failed to activate game");
let active = context.active_game(); // Some("skyrim-se")
let required_provider = context.active_game_required_provider(); // Some("nexus-mods")

// Retrieve providers
let mod_provider = context.get_mod_provider("nexus-mods").expect("Provider not found");
let game_provider = context.get_game_provider("skyrim-se").expect("Game not found");

// List all registered items
for (id, source) in context.list_mod_providers() {
    println!("Mod Provider: {} (source: {:?})", id, source);
}

for (game_id, source, required_provider) in context.list_games() {
    println!("Game: {} requires {} (source: {:?})", game_id, required_provider, source);
}

// Get metadata
let metadata = context.get_metadata("skyrim-se").expect("Metadata not found");
println!("Game: {} ({})", metadata.display_name, metadata.short_name);

```

--------------------------------

### Handle ZIP Archives: Inspect, Extract, and Determine Root (Rust)

Source: https://context7.com/void-mod-manager/lib-vmm/llms.txt

Provides utilities for working with ZIP archives. It can inspect archive contents, count file types, extract archives to a specified directory, and automatically determine the actual root directory, handling cases with single top-level folders.

```rust
use lib_vmm::archive::{inspect_zip, extract_zip, determine_root_dir, ensure_dir, replace_symlink_dir, ArchiveInfo};
use std::path::{Path, PathBuf};

fn handle_mod_archive(archive_path: &Path, game_data_dir: &Path) -> Result<PathBuf, Box<dyn std::error::Error>> {
    // Inspect without extracting
    let info = inspect_zip(archive_path)?;
    println!("Archive contains {} files", info.total_files);
    println!("File types:");
    for (ext, count) in &info.file_counts_by_extension {
        println!("  .{}: {} files", ext, count);
    }

    // Check for specific file types
    let dll_count = info.count_ext("dll");
    let esp_count = info.count_ext("esp");
    println!("Found {} DLLs and {} ESP files", dll_count, esp_count);

    // Create extraction directory
    let extract_dir = game_data_dir.join("temp_extract");
    ensure_dir(&extract_dir)?;

    // Extract archive
    let extract_info = extract_zip(archive_path, &extract_dir)?;

    // Determine actual root (handles archives with single top-level folder)
    let root_dir = determine_root_dir(&extract_info, &extract_dir);
    println!("Mod root directory: {:?}", root_dir);

    // If single top-level directory, might want to create symlink
    if let Some(single_dir) = extract_info.single_top_level_dir() {
        let actual_path = extract_dir.join(&single_dir);
        let symlink_path = game_data_dir.join("current_mod");
        replace_symlink_dir(&actual_path, &symlink_path)?;
        println!("Created symlink: {:?} -> {:?}", symlink_path, actual_path);
    }

    Ok(root_dir)
}

// Example: Validate mod structure before installation
fn validate_mod_structure(archive_path: &Path) -> Result<bool, Box<dyn std::error::Error>> {
    let info = inspect_zip(archive_path)?;

    // Check for required files
    let has_plugin = info.count_ext("esp") > 0 || info.count_ext("esm") > 0;
    let has_assets = info.count_ext("dds") > 0 || info.count_ext("nif") > 0;

    // Validate structure
    if info.total_files == 0 {
        return Ok(false);
    }

    println!("Validation:");
    println!("  Has plugin files: {}", has_plugin);
    println!("  Has asset files: {}", has_assets);
    println!("  Top-level directories: {:?}", info.top_level_dirs);

    Ok(has_plugin || has_assets)
}

```

--------------------------------

### Rust: Implement Custom Mod Provider for Void Mod Manager

Source: https://context7.com/void-mod-manager/lib-vmm/llms.txt

This Rust code defines a `CustomModProvider` that implements the `Provider` and `ModProvider` traits for the Void Mod Manager. It includes capabilities for requiring an API key, downloading mods via an API, discovering mods with search and pagination, and fetching extended mod details. Dependencies include `async-trait`, `tokio`, and various `lib_vmm` modules.

```rust
use async_trait::async_trait;
use std::sync::Arc;
use std::path::{Path, PathBuf};
use tokio::sync::watch;
use lib_vmm::{
    traits::{
        provider::Provider,
        game_provider::{GameProvider, GameMetadata, GameIcon, GameInstallError},
        mod_provider::{ModProvider, ModDownloadResult},
        discovery::*,
    },
    capabilities::{
        base::CapabilityRef,
        builder::{CapabilityBuilder, CapabilityError},
        api_key_capability::{RequiresApiKey, ApiKeyValidationError, ApiSubmitResponse, KeyAction},
        form::{FormSchema, Field, FieldType},
    },
    runtime::context::{Context, ContextBuilder},
    registry::model::ProviderSource,
    api::provider_api::{ProviderApi, DefaultProviderApi},
    services::download_service::DownloadService,
    net::{ReqwestProviderHttpClient, ProviderHttpClient},
    archive::{extract_zip, determine_root_dir},
};

// Complete mod provider implementation
pub struct CustomModProvider {
    id: String,
    api: Option<Arc<dyn ProviderApi>>,
    http_client: Arc<ReqwestProviderHttpClient>,
    caps: Vec<CapabilityRef>,
}

impl CustomModProvider {
    pub fn new(id: &str) -> Arc<Self> {
        Arc::new_cyclic(|weak_self| {
            let caps = CapabilityBuilder::new_from_weak(weak_self.clone())
                .api_key()
                .finish();

            CustomModProvider {
                id: id.to_string(),
                api: None,
                http_client: ReqwestProviderHttpClient::new(),
                caps,
            }
        })
    }

    pub fn set_api(&mut self, api: Arc<dyn ProviderApi>) {
        self.api = Some(api);
    }
}

impl Provider for CustomModProvider {
    fn id(&self) -> &'static str {
        "custom-mods"
    }

    fn capabilities(&self) -> &[CapabilityRef] {
        &self.caps
    }
}

impl RequiresApiKey for CustomModProvider {
    fn on_provided(&self, values: &[ApiSubmitResponse]) -> Result<KeyAction, ApiKeyValidationError> {
        let key = values.first().ok_or(ApiKeyValidationError::Empty)?;
        if key.value.len() < 10 {
            return Err(ApiKeyValidationError::TooShort { min_len: 10 });
        }
        Ok(KeyAction::Store)
    }

    fn needs_prompt(&self, existing_key: Option<&str>) -> bool {
        existing_key.is_none()
    }

    fn render(&self) -> Result<FormSchema, CapabilityError> {
        Ok(FormSchema {
            title: "API Key Required".to_string(),
            description: Some("Enter your API key".to_string()),
            fields: vec![Field {
                id: "api_key".to_string(),
                label: "API Key".to_string(),
                field_type: FieldType::Password,
                placeholder: Some("Enter key".to_string()),
                regex: None,
                help: None,
            }],
        })
    }
}

#[async_trait]
impl ModProvider for CustomModProvider {
    async fn download_mod(&self, mod_id: String) -> ModDownloadResult {
        // Use provider API to queue download if available
        if let Some(api) = &self.api {
            let url = format!("https://mods.example.com/download/{}", mod_id);
            let mut receiver = api.queue_download(url).await;

            // Wait for completion
            loop {
                if receiver.changed().await.is_ok() {
                    let status = receiver.borrow().clone();
                    match status {
                        ModDownloadResult::Completed(_) => return status,
                        ModDownloadResult::Failed(_) => return status,
                        _ => continue,
                    }
                }
            }
        }

        ModDownloadResult::CannotComplete("No API available".to_string())
    }

    async fn discover(&self, query: &DiscoveryQuery) -> Result<DiscoveryResult, DiscoveryError> {
        let mut url = format!("https://api.example.com/mods?game={}", query.game_id);

        if let Some(page) = query.page {
            url.push_str(&format!("&page={}", page));
        }
        if let Some(search) = &query.search {
            url.push_str(&format!("&q={}", search));
        }

        // Fetch and parse response
        self.http_client.get_typed(&url).await
            .map_err(|e| DiscoveryError::Network(e.to_string()))
    }

    async fn get_extended_mod(&self, mod_id: &str) -> ModExtendedMetadata {
        let url = format!("https://api.example.com/mods/{}", mod_id);
        self.http_client.get_typed(&url).await
            .unwrap_or_else(|_| ModExtendedMetadata {
                header_image: String::new(),
                carousel_images: vec![],
                version: "unknown".to_string(),
                installed: false,
                description: String::new(),
            })
    }

    fn register(&self) -> String {
        self.id.clone()
    }
}

```

--------------------------------

### Implement NexusModsProvider for ModProvider Trait in Rust

Source: https://context7.com/void-mod-manager/lib-vmm/llms.txt

This Rust code demonstrates the implementation of the `ModProvider` trait for a `NexusModsProvider`. It includes methods for discovering mods, downloading them, and retrieving extended metadata. The provider utilizes the capabilities system for features like API key authentication.

```rust
use async_trait::async_trait;
use std::sync::Arc;
use std::path::PathBuf;
use lib_vmm::traits::mod_provider::{ModProvider, ModDownloadResult};
use lib_vmm::traits::provider::Provider;
use lib_vmm::traits::discovery::{DiscoveryQuery, DiscoveryResult, DiscoveryError, ModExtendedMetadata, ModSummary, DiscoveryMeta, PaginationMeta, SortOrder};
use lib_vmm::capabilities::base::CapabilityRef;
use lib_vmm::capabilities::builder::CapabilityBuilder;

pub struct NexusModsProvider {
    id: String,
    caps: Vec<CapabilityRef>,
}

impl NexusModsProvider {
    pub fn new() -> Arc<Self> {
        Arc::new_cyclic(|weak_self| {
            let caps = CapabilityBuilder::new_from_weak(weak_self.clone())
                .api_key()  // Adds API key capability
                .finish();

            NexusModsProvider {
                id: "nexus-mods".to_string(),
                caps,
            }
        })
    }
}

impl Provider for NexusModsProvider {
    fn id(&self) -> &'static str {
        "nexus-mods"
    }

    fn capabilities(&self) -> &[CapabilityRef] {
        &self.caps
    }
}

#[async_trait]
impl ModProvider for NexusModsProvider {
    async fn download_mod(&self, mod_id: String) -> ModDownloadResult {
        // Simulate download process
        println!("Downloading mod: {}", mod_id);
        ModDownloadResult::Completed(PathBuf::from(format!("/downloads/{}.zip", mod_id)))
    }

    async fn discover(&self, query: &DiscoveryQuery) -> Result<DiscoveryResult, DiscoveryError> {
        // Return paginated mod discovery results
        Ok(DiscoveryResult {
            meta: DiscoveryMeta {
                provider_id: self.id.clone(),
                game_id: query.game_id.clone(),
                pagination: PaginationMeta {
                    current: query.page.unwrap_or(1) as u64,
                    page_size: query.page_size.unwrap_or(20) as u64,
                    total_pages: Some(10),
                    total_items: Some(200),
                },
                applied_tags: query.tags.clone().unwrap_or_default(),
                available_tags: None,
            },
            mods: vec![
                ModSummary {
                    id: "12345".into(),
                    name: "Enhanced Graphics".into(),
                    description: "Full description here".into(),
                    short_description: "Improves graphics quality".into(),
                    downloads: 50000,
                    views: 100000,
                    likes: 2500,
                    thumbnail_image: "/thumbs/12345.jpg".into(),
                    tags: vec!["graphics".into(), "overhaul".into()],
                    user_name: "ModAuthor".into(),
                    user_avatar: "/avatars/author.jpg".into(),
                }
            ],
        })
    }

    async fn get_extended_mod(&self, mod_id: &str) -> ModExtendedMetadata {
        ModExtendedMetadata {
            header_image: format!("/images/{}/header.jpg", mod_id),
            carousel_images: vec![
                format!("/images/{}/screen1.jpg", mod_id),
                format!("/images/{}/screen2.jpg", mod_id),
            ],
            version: "2.1.0".into(),
            installed: false,
            description: "Full markdown description with installation instructions...".into(),
        }
    }

    fn register(&self) -> String {
        self.id.clone()
    }
}

```

--------------------------------

### Rust: Define and Implement API Key Capability for Provider

Source: https://context7.com/void-mod-manager/lib-vmm/llms.txt

This Rust code demonstrates how to define a provider (`MyModProvider`) that requires an API key. It utilizes `CapabilityBuilder` to declare the `RequiresApiKey` capability and implements the necessary trait methods for validation, prompting, and rendering a form.

```rust
use std::sync::{Arc, Weak};
use lib_vmm::capabilities::{
    base::{Capability, CapabilityRef},
    builder::CapabilityBuilder,
    api_key_capability::{RequiresApiKey, ApiKeyValidationError, ApiSubmitResponse, KeyAction},
    form::{FormSchema, Field, FieldType},
};

// Define a provider with API key capability
pub struct MyModProvider {
    caps: Vec<CapabilityRef>,
}

impl MyModProvider {
    pub fn new() -> Arc<Self> {
        Arc::new_cyclic(|weak_self| {
            // Use CapabilityBuilder to declare capabilities
            let caps = CapabilityBuilder::new_from_weak(weak_self.clone())
                .api_key()  // Adds RequiresApiKey capability
                .finish();

            MyModProvider { caps }
        })
    }
}

impl Provider for MyModProvider {
    fn id(&self) -> &'static str {
        "my-mod-provider"
    }

    fn capabilities(&self) -> &[CapabilityRef] {
        &self.caps
    }
}

// Implement RequiresApiKey behavior
impl RequiresApiKey for MyModProvider {
    fn on_provided(&self, values: &[ApiSubmitResponse]) -> Result<KeyAction, ApiKeyValidationError> {
        let api_key = values.first().ok_or(ApiKeyValidationError::Empty)?;

        // Validate the API key
        if api_key.value.is_empty() {
            return Err(ApiKeyValidationError::Empty);
        }
        if api_key.value.len() < 16 {
            return Err(ApiKeyValidationError::TooShort { min_len: 16 });
        }

        // Perform actual validation (e.g., test API call)
        // ...

        Ok(KeyAction::Store)  // Tell runtime to store the key
    }

    fn on_rejected(&self) {
        println!("User rejected API key entry");
    }

    fn needs_prompt(&self, existing_key: Option<&str>) -> bool {
        match existing_key {
            None => true,  // No key stored
            Some(k) if k.is_empty() => true,  // Empty key
            Some(_) => false,  // Valid key exists
        }
    }

    fn render(&self) -> Result<FormSchema, lib_vmm::capabilities::builder::CapabilityError> {
        Ok(FormSchema {
            title: "Enter Nexus Mods API Key".to_string(),
            description: Some("Your API key can be found at nexusmods.com/users/myaccount?tab=api".to_string()),
            fields: vec![
                Field {
                    id: "api_key".to_string(),
                    label: "API Key".to_string(),
                    field_type: FieldType::Password,
                    placeholder: Some("Paste your API key here".to_string()),
                    regex: Some(r"^[a-zA-Z0-9_-]{16,}$".to_string()),
                    help: Some("A valid API key is at least 16 characters".to_string()),
                }
            ],
        })
    }
}

```

--------------------------------

### Implement Provider Trait in Rust

Source: https://context7.com/void-mod-manager/lib-vmm/llms.txt

Demonstrates the implementation of the base `Provider` trait for custom providers in Lib-VMM. This includes defining the provider's ID, listing its capabilities, and providing helper functions to find and retrieve specific capabilities by ID or type.

```rust
use std::sync::Arc;
use lib_vmm::traits::provider::Provider;
use lib_vmm::capabilities::base::{Capability, CapabilityRef};

pub struct MyProvider {
    capabilities: Vec<CapabilityRef>,
}

impl Provider for MyProvider {
    fn id(&self) -> &'static str {
        "my-provider"
    }

    fn capabilities(&self) -> &[CapabilityRef] {
        &self.capabilities
    }

    // Helper to find capability by ID
    fn find_capability(&self, id: &str) -> Option<&dyn Capability> {
        self.capabilities()
            .iter()
            .map(|o| o.as_ref())
            .find(|o| o.id() == id)
    }

    // Helper to get concrete capability type
    fn get<T: Capability + 'static>(&self) -> Option<&T> {
        self.capabilities()
            .iter()
            .find_map(|o| o.as_ref().as_any().downcast_ref::<T>())
    }
}

```

--------------------------------

### Normalize and Validate Registry IDs (Rust)

Source: https://context7.com/void-mod-manager/lib-vmm/llms.txt

Ensures registry IDs are lowercase alphanumeric, optionally with namespace separation. It handles normalization, checks for core IDs, and enforces length and format constraints, returning errors for invalid formats or reserved namespaces.

```rust
use lib_vmm::registry::id::{normalize_id, is_core_id};
use lib_vmm::registry::error::RegistryError;

// Normalize and validate IDs
fn test_id_normalization() {
    // Valid IDs
    assert_eq!(normalize_id("nexus-mods").unwrap(), "nexus-mods");
    assert_eq!(normalize_id("NEXUS-MODS").unwrap(), "nexus-mods"); // Lowercased
    assert_eq!(normalize_id("core:steam").unwrap(), "core:steam");
    assert_eq!(normalize_id("plugin:my.provider_v2").unwrap(), "plugin:my.provider_v2");

    // Check if ID is core
    assert!(is_core_id("core:steam-workshop"));
    assert!(!is_core_id("nexus-mods"));
    assert!(!is_core_id("plugin:custom"));

    // Invalid IDs (will return Err)
    assert!(normalize_id("Invalid$ID").is_err()); // Invalid character
    assert!(normalize_id("a:b:c").is_err()); // Multiple colons
    assert!(normalize_id(":nope").is_err()); // Starts with colon
    assert!(normalize_id("ends:").is_err()); // Ends with colon
    assert!(normalize_id("").is_err()); // Empty

    // Length limits (1-200 characters)
    let too_long = "a".repeat(201);
    assert!(normalize_id(&too_long).is_err());
}

// Use in provider registration
fn register_with_validation() -> Result<(), RegistryError> {
    let mut builder = ContextBuilder::new();

    // This will validate the ID
    let provider = Arc::new(NexusModsProvider::new());
    builder.register_mod_provider(
        "nexus-mods", // Automatically normalized and validated
        provider,
        ProviderSource::Plugin("my-plugin".into())
    )?;

    // Attempting to use reserved 'core:' prefix without Core source fails
    let custom = Arc::new(CustomProvider::new());
    let result = builder.register_mod_provider(
        "core:custom",
        custom,
        ProviderSource::Plugin("bad-plugin".into())
    );
    assert!(matches!(result, Err(RegistryError::ReservedCoreId(_))));

    Ok(())
}

```

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