### Accessing Metadata

Source: https://docs.rs/epub/latest/epub/doc/struct.EpubDoc.html

Example of retrieving a specific metadata item from the document.

```rust
let title = doc.metadata.iter().find(|d| d.property == "title");
assert_eq!(title.unwrap().value, "Todo es mío");
```

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

### Get Container File Content

Source: https://docs.rs/epub/latest/epub/archive/struct.EpubArchive.html

Retrieves the content of the "META-INF/container.xml" file from the EPUB archive. Returns an error if the file is missing.

```rust
pub fn get_container_file(&mut self) -> Result<Vec<u8>, ArchiveError>
```

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

### Get Total Number of Chapters in EPUB

Source: https://docs.rs/epub/latest/src/epub/doc.rs.html

Retrieves the total number of chapters within the EPUB document.

```rust
# use epub::doc::EpubDoc;
# let doc = EpubDoc::new("test.epub");
# let mut doc = doc.unwrap();
assert_eq!(17, doc.get_num_chapters());
```

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

### Get EPUB Root File Path

Source: https://docs.rs/epub/latest/src/epub/doc.rs.html

Parses the container XML to find the 'rootfile' element and extracts its 'full-path' attribute, which specifies the main OPF or XPF file.

```rust
let root = xmlutils::XMLReader::parse(container)?;
let el = root.borrow();
let element = el
    .find("rootfile")
    .ok_or_else(|| XMLError::AttrNotFound("rootfile".into()))?;
let el2 = element.borrow();

let attr = el2
    .get_attr("full-path")
    .ok_or_else(|| XMLError::AttrNotFound("full-path".into()))?;

Ok(PathBuf::from(attr))
```

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

### Get EPUB Entry as String

Source: https://docs.rs/epub/latest/epub/archive/struct.EpubArchive.html

Retrieves the content of a specific file within the EPUB archive as a String. Returns an error if the file does not exist or cannot be decoded as UTF-8.

```rust
pub fn get_entry_as_str<P: AsRef<Path>>( &mut self, name: P, ) -> Result<String, ArchiveError>
```

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

### Get Resource by Path

Source: https://docs.rs/epub/latest/src/epub/doc.rs.html

Retrieves the raw content of a resource from the EPUB archive using its full path. Returns None if the path does not exist.

```APIDOC
## GET /api/epub/resource/path/{path}

### Description
Retrieves the raw content of a resource specified by its full path within the EPUB archive.

### Method
GET

### Endpoint
/api/epub/resource/path/{path}

### Parameters
#### Path Parameters
- **path** (string) - Required - The full path to the resource within the EPUB archive.

### Request Example
None

### Response
#### Success Response (200)
- **content** (bytes) - The binary content of the resource.

#### Response Example
{
  "content": "...binary resource data..."
}
```

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

### Retrieve current chapter with URI rewriting

Source: https://docs.rs/epub/latest/epub/doc/struct.EpubDoc.html

Get the current chapter content with internal resource URIs updated to use the epub:// prefix for rendering.

```rust
let current = doc.get_current_with_epub_uris().unwrap();
let text = String::from_utf8(current).unwrap();
assert!(text.contains("epub://OEBPS/Images/portada.png"));
doc.go_next();
let current = doc.get_current_with_epub_uris().unwrap();
let text = String::from_utf8(current).unwrap();
assert!(text.contains("epub://OEBPS/Styles/stylesheet.css"));
assert!(text.contains("http://creativecommons.org/licenses/by-sa/3.0/"));
```

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

### Get EPUB Metadata

Source: https://docs.rs/epub/latest/src/epub/lib.rs.html

Retrieves specific metadata from an opened EPUB document using its key. Asserts that the 'language' metadata is 'es'.

```rust
# use epub::doc::EpubDoc;
# let doc = EpubDoc::new("test.epub");
# let doc = doc.unwrap();
let language = doc.mdata("language");
assert_eq!(language.unwrap().value, "es");
```

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

### Get Resource as String by Path

Source: https://docs.rs/epub/latest/src/epub/doc.rs.html

Retrieves the content of a resource as a String, using its full path. Returns None if the path does not exist or cannot be decoded as a string.

```APIDOC
## GET /api/epub/resource/string/path/{path}

### Description
Retrieves the content of a resource as a String, specified by its full path within the EPUB archive. Assumes UTF-8 encoding.

### Method
GET

### Endpoint
/api/epub/resource/string/path/{path}

### Parameters
#### Path Parameters
- **path** (string) - Required - The full path to the resource within the EPUB archive.

### Request Example
None

### Response
#### Success Response (200)
- **content** (string) - The content of the resource as a string.

#### Response Example
{
  "content": "<html><body><h1>Title</h1></body></html>"
}
```

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

### Get Current Chapter Number in EPUB

Source: https://docs.rs/epub/latest/src/epub/doc.rs.html

Returns the index of the currently active chapter, starting from 0.

```rust
pub fn get_current_chapter(&self) -> usize {
    self.current
}
```

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

### Getting the Cover ID

Source: https://docs.rs/epub/latest/epub/doc/struct.EpubDoc.html

Retrieve the identifier for the document's cover image.

```rust
use epub::doc::EpubDoc;

let doc = EpubDoc::new("test.epub");
assert!(doc.is_ok());
let mut doc = doc.unwrap();

let cover_id = doc.get_cover_id();
```

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

### Get Resource MIME Type by Path

Source: https://docs.rs/epub/latest/src/epub/doc.rs.html

Searches for and returns the MIME type of a resource using its full path. Returns None if the resource is not found.

```rust
pub fn get_resource_mime_by_path<P: AsRef<Path>>(&self, path: P) -> Option<String> {
        let path = path.as_ref();

        self.resources.iter().find_map(|(_, r)| {
            if r.path == path {
                Some(r.mime.clone())
            } else {
                None
            }
        })
    }
```

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

### Get EPUB Entry as Bytes

Source: https://docs.rs/epub/latest/epub/archive/struct.EpubArchive.html

Retrieves the content of a specific file within the EPUB archive as a byte vector. Returns an error if the file does not exist.

```rust
pub fn get_entry<P: AsRef<Path>>( &mut self, name: P, ) -> Result<Vec<u8>, ArchiveError>
```

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

### Get Entry Content as String

Source: https://docs.rs/epub/latest/src/epub/archive.rs.html

Retrieves the content of a specific file within the EPUB archive and attempts to decode it as a UTF-8 String. Returns an error if the file is not found or if decoding fails.

```rust
    /// Returns the content of the file by the `name` as `String`.
    ///
    /// # Errors
    ///
    /// Returns an error if the name doesn't exists in the zip archive.
    pub fn get_entry_as_str<P: AsRef<Path>>(&mut self, name: P) -> Result<String, ArchiveError> {
        let content = self.get_entry(name)?;
        String::from_utf8(content).map_err(ArchiveError::from)
    }
```

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

### Get Cover Information

Source: https://docs.rs/epub/latest/src/epub/doc.rs.html

Retrieves the cover image data and its MIME type. It first finds the cover ID and then fetches the corresponding resource.

```APIDOC
## GET /api/epub/cover

### Description
Retrieves the cover image content and its MIME type from the EPUB document.

### Method
GET

### Endpoint
/api/epub/cover

### Parameters
None

### Request Example
None

### Response
#### Success Response (200)
- **content** (bytes) - The binary data of the cover image.
- **mime_type** (string) - The MIME type of the cover image (e.g., 'image/jpeg').

#### Response Example
{
  "content": "...binary image data...",
  "mime_type": "image/png"
}
```

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

### Chapter Navigation and Information

Source: https://docs.rs/epub/latest/src/epub/doc.rs.html

Provides methods for retrieving the current chapter ID, navigating to the next or previous chapter, and getting the total number of chapters.

```APIDOC
## GET /epub/current_id

### Description
Returns the ID of the current chapter.

### Method
GET

### Endpoint
/epub/current_id

### Response
#### Success Response (200)
- **id** (string) - The ID of the current chapter. Can be None if the epub is broken.

#### Response Example
{
  "id": "titlepage.xhtml"
}

## POST /epub/go_next

### Description
Changes the current chapter to the next one in the sequence.

### Method
POST

### Endpoint
/epub/go_next

### Response
#### Success Response (200)
- **success** (boolean) - True if navigation was successful, false if the current chapter was the last one.

#### Response Example
{
  "success": true
}

## POST /epub/go_prev

### Description
Changes the current chapter to the previous one in the sequence.

### Method
POST

### Endpoint
/epub/go_prev

### Response
#### Success Response (200)
- **success** (boolean) - True if navigation was successful, false if the current chapter was the first one.

#### Response Example
{
  "success": true
}

## GET /epub/num_chapters

### Description
Returns the total number of chapters in the EPUB document.

### Method
GET

### Endpoint
/epub/num_chapters

### Response
#### Success Response (200)
- **count** (integer) - The total number of chapters.

#### Response Example
{
  "count": 17
}

## GET /epub/current_chapter

### Description
Returns the index of the current chapter, starting from 0.

### Method
GET

### Endpoint
/epub/current_chapter

### Response
#### Success Response (200)
- **index** (integer) - The index of the current chapter.

#### Response Example
{
  "index": 0
}

## PUT /epub/set_chapter

### Description
Changes the current chapter to a specified chapter index.

### Method
PUT

### Endpoint
/epub/set_chapter

### Parameters
#### Query Parameters
- **n** (integer) - Required - The index of the chapter to set as current.

### Response
#### Success Response (200)
- **success** (boolean) - True if the chapter was set successfully, false if the index was out of bounds.

#### Response Example
{
  "success": true
}
```

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

### Get Current Chapter with EPUB URIs

Source: https://docs.rs/epub/latest/src/epub/doc.rs.html

Returns the current chapter's content with local resource URIs transformed to the 'epub://' prefix. This is useful for rendering HTML content, as it allows the engine to correctly resolve relative paths. Errors if the EPUB is broken.

```rust
pub fn get_current_with_epub_uris(&mut self) -> Result<Vec<u8>, DocError> {
        let path = self.get_current_path().ok_or(DocError::InvalidEpub)?;
        let (current, _mime) = self.get_current().ok_or(DocError::InvalidEpub)?;

        let resp = xmlutils::replace_attrs(
            current.as_slice(),
            |element, attr, value| match (element, attr) {
                ("link", "href") | ("image", "href") | ("a", "href") | ("img", "src") => {
                    build_epub_uri(&path, value)
                }
                _ => String::from(value),
            },
            &self.extra_css,
        );

        resp.map_err(From::from)
    }
```

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

### Get Entry Content as Bytes

Source: https://docs.rs/epub/latest/src/epub/archive.rs.html

Retrieves the content of a specific file within the EPUB archive as a byte vector. It handles potential percent-encoding in file names and returns an error if the file is not found or other zip errors occur.

```rust
    /// Returns the content of the file by the `name` as `Vec<u8>`.
    ///
    /// # Errors
    ///
    /// Returns an error if the name doesn't exists in the zip archive.
    pub fn get_entry<P: AsRef<Path>>(&mut self, name: P) -> Result<Vec<u8>, ArchiveError> {
        let mut entry: Vec<u8> = vec![];

        let name = name.as_ref().to_str().ok_or(ArchiveError::PathUtf8)?;

        match self.zip.by_name(name) {
            Ok(mut zipfile) => {
                zipfile.read_to_end(&mut entry)?;
                return Ok(entry);
            }
            Err(zip::result::ZipError::FileNotFound) => {} // Fall through to try percent encoding
            Err(e) => {
                return Err(e.into());
            }
        };

        // try percent encoding
        let name = percent_encoding::percent_decode(name.as_bytes()).decode_utf8()?;
        let mut zipfile = self.zip.by_name(&name)?;
        zipfile.read_to_end(&mut entry)?;
        Ok(entry)
    }
```

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

### Get Resource as String by ID

Source: https://docs.rs/epub/latest/src/epub/doc.rs.html

Retrieves the content and MIME type of a resource as a String, identified by its ID. Returns None if the ID is not found or cannot be decoded.

```APIDOC
## GET /api/epub/resource/string/id/{id}

### Description
Retrieves the content and MIME type of a resource as a String, identified by its ID. Assumes UTF-8 encoding.

### Method
GET

### Endpoint
/api/epub/resource/string/id/{id}

### Parameters
#### Path Parameters
- **id** (string) - Required - The ID of the resource to retrieve.

### Request Example
None

### Response
#### Success Response (200)
- **content** (string) - The content of the resource as a string.
- **mime_type** (string) - The MIME type of the resource.

#### Response Example
{
  "content": "This is the content of the resource.",
  "mime_type": "text/plain"
}
```

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

### Get Current Chapter Content as String

Source: https://docs.rs/epub/latest/src/epub/doc.rs.html

Retrieves the current chapter's content as a String and its MIME type. This is a convenience method for text-based content. Returns None if the EPUB is broken.

```rust
pub fn get_current_str(&mut self) -> Option<(String, String)> {
        let current_id = self.get_current_id()?;
        self.get_resource_str(&current_id)
    }
```

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

### Get Resource by ID

Source: https://docs.rs/epub/latest/src/epub/doc.rs.html

Retrieves the content and MIME type of a resource identified by its ID, typically defined in the EPUB spine. Returns None if the ID is not found.

```APIDOC
## GET /api/epub/resource/id/{id}

### Description
Retrieves the content and MIME type of a resource identified by its ID. This ID is usually defined within the EPUB's spine or manifest.

### Method
GET

### Endpoint
/api/epub/resource/id/{id}

### Parameters
#### Path Parameters
- **id** (string) - Required - The ID of the resource to retrieve.

### Request Example
None

### Response
#### Success Response (200)
- **content** (bytes) - The binary content of the resource.
- **mime_type** (string) - The MIME type of the resource.

#### Response Example
{
  "content": "...binary resource data...",
  "mime_type": "application/xhtml+xml"
}
```

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

### Get Current Chapter Path

Source: https://docs.rs/epub/latest/src/epub/doc.rs.html

Retrieves the full file path of the current chapter within the EPUB structure. Returns None if the EPUB is broken or the current chapter cannot be determined.

```rust
pub fn get_current_path(&self) -> Option<PathBuf> {
        let current_id = self.get_current_id()?;

```

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

### Opening an EPUB file

Source: https://docs.rs/epub/latest/epub

Initialize an EpubDoc instance from a file path.

```rust
use epub::doc::EpubDoc;
let doc = EpubDoc::new("test.epub");
assert!(doc.is_ok());
let doc = doc.unwrap();
```

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

### Create EpubArchive from File Path

Source: https://docs.rs/epub/latest/src/epub/archive.rs.html

Constructor for EpubArchive that opens an EPUB file from a given path. Requires a file to exist and be a valid zip archive. Uses BufReader for efficient file handling.

```rust
impl EpubArchive<BufReader<File>> {
    /// Opens the epub file in `path`.
    ///
    /// # Errors
    ///
    /// Returns an error if the zip is broken or if the file doesn't
    /// exists.
    pub fn new<P: AsRef<Path>>(path: P) -> Result<Self, ArchiveError> {
        let path = path.as_ref();
        let file = File::open(path)?;
        let mut archive = Self::from_reader(BufReader::new(file))?;
        archive.path = path.to_path_buf();
        Ok(archive)
    }
}
```

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

### EpubDoc::new

Source: https://docs.rs/epub/latest/epub/doc/struct.EpubDoc.html

Constructor for EpubDoc that opens an EPUB file from a given path.

```APIDOC
## EpubDoc::new

### Description
Opens the epub file in `path`. Initializes some internal variables to be able to access the epub spine definition and to navigate through the epub.

### Method
`pub fn new<P: AsRef<Path>>(path: P) -> Result<Self, DocError>`

### Endpoint
N/A (This is a constructor)

### Parameters
#### Path Parameters
- **path** (P: AsRef<Path>) - Required - The path to the EPUB file.

### Request Body
N/A

### Response
#### Success Response (Result<Self, DocError>)
- **Self** - An initialized `EpubDoc` instance if successful.

#### Errors
- **DocError** - Returned if the epub is broken or if the file doesn’t exist.

### Examples
```rust
use epub::doc::EpubDoc;

let doc = EpubDoc::new("test.epub");
assert!(doc.is_ok());
```
```

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

### Open EpubArchive from File Path

Source: https://docs.rs/epub/latest/epub/archive/struct.EpubArchive.html

Opens an EPUB file from a given path. Returns an error if the file is not found or the archive is corrupted.

```rust
pub fn new<P: AsRef<Path>>(path: P) -> Result<Self, ArchiveError>
```

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

### EpubArchive::new

Source: https://docs.rs/epub/latest/src/epub/archive.rs.html

Opens an EPUB file from a given path.

```APIDOC
## EpubArchive::new

### Description
Opens the epub file in `path`.

### Method
`pub fn new<P: AsRef<Path>>(path: P) -> Result<Self, ArchiveError>`

### Endpoint
N/A (File System Operation)

### Parameters
#### Path Parameters
- **path** (P: AsRef<Path>) - Required - The path to the EPUB file.

### Request Body
N/A

### Response
#### Success Response (Self)
- **EpubArchive<BufReader<File>>** - An instance of EpubArchive opened from the specified file.

#### Errors
- **ArchiveError::IO** - If there is an I/O error opening the file.
- **ArchiveError::Zip** - If the zip archive is corrupted.
- **ArchiveError::PathUtf8** - If the provided path is not valid UTF-8.

### Request Example
```rust
let archive = EpubArchive::<BufReader<File>>::new("path/to/your/epub.epub");
```

### Response Example
```rust
// On success:
// Ok(EpubArchive { ... })

// On error:
// Err(ArchiveError::IO(std::io::Error))
// Err(ArchiveError::Zip(zip::result::ZipError))
```
```

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

### Get Current Chapter ID in EPUB

Source: https://docs.rs/epub/latest/src/epub/doc.rs.html

Retrieves the ID of the current chapter. Returns `None` if the EPUB is malformed.

```rust
# use epub::doc::EpubDoc;
# let doc = EpubDoc::new("test.epub");
# let doc = doc.unwrap();
let id = doc.get_current_id();
assert_eq!("titlepage.xhtml", id.unwrap());
```

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

### Get Navigation Document ID

Source: https://docs.rs/epub/latest/src/epub/doc.rs.html

Retrieves the ID of the navigation document, which is specific to EPUB3. Returns None for EPUB2 documents.

```APIDOC
## GET /api/epub/nav/id

### Description
Retrieves the ID of the navigation document. This is a feature specific to EPUB3. For EPUB2, this will return null.

### Method
GET

### Endpoint
/api/epub/nav/id

### Parameters
None

### Request Example
None

### Response
#### Success Response (200)
- **nav_id** (string) - The ID of the navigation document, if found.

#### Response Example
{
  "nav_id": "nav"
}
```

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

### Navigate between chapters

Source: https://docs.rs/epub/latest/epub/doc/struct.EpubDoc.html

Move forward or backward through the EPUB spine.

```rust
doc.go_next();
assert_eq!("000.xhtml", doc.get_current_id().unwrap());

let len = doc.spine.len();
for i in 1..len {
    doc.go_next();
}
assert!(!doc.go_next());
```

```rust
assert!(!doc.go_prev());

doc.go_next(); // 000.xhtml
doc.go_next(); // 001.xhtml
doc.go_next(); // 002.xhtml
doc.go_prev(); // 001.xhtml
assert_eq!("001.xhtml", doc.get_current_id().unwrap());
```

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

### Parse EPUB Root File

Source: https://docs.rs/epub/latest/src/epub/doc.rs.html

Initializes the EPUB structure by parsing the root file and populating manifest, spine, and metadata fields.

```rust
fn fill_resources(&mut self) -> Result<(), DocError> {
        let container = self.archive.get_entry(&self.root_file)?;
        let root = xmlutils::XMLReader::parse(container.as_slice())?;
        self.version = match root.borrow().get_attr("version") {
            Some(v) if v == "2.0" => EpubVersion::Version2_0,
            Some(v) if v == "3.0" => EpubVersion::Version3_0,
            Some(v) => EpubVersion::Unknown(String::from(v)),
            _ => EpubVersion::Unknown(String::from("Unknown")),
        };
        let unique_identifier_id = &root.borrow().get_attr("unique-identifier");

        // resources from manifest
        // This should be run before everything else, because other functions relies on
        // self.resources and should be filled before calling `fill_toc`
        let manifest = root
            .borrow()
            .find("manifest")
            .ok_or(DocError::InvalidEpub)?;
        for r in &manifest.borrow().children {
            let item = r.borrow();
            let _ = self.insert_resource(&item);
        }

        // items from spine
        let spine = root.borrow().find("spine").ok_or(DocError::InvalidEpub)?;
        for r in &spine.borrow().children {
            let item = r.borrow();
            let _ = self.insert_spine(&item);
        }

        // toc.ncx
        if let Some(toc) = spine.borrow().get_attr("toc") {
            let _ = self.fill_toc(&toc);
        }

        // metadata
        let metadata_elem = root
            .borrow()
            .find("metadata")
            .ok_or(DocError::InvalidEpub)?;
        self.fill_metadata(&metadata_elem.borrow());

        let identifier = if let Some(uid) = unique_identifier_id {
            // find identifier with id
            self.metadata
                .iter()
                .find(|d| d.property == "identifier" && d.id.as_ref().is_some_and(|id| id == uid))
        } else {
            // fallback with the first identifier.
            self.metadata.iter().find(|d| d.property == "identifier")
        };
        self.unique_identifier = identifier.map(|data| data.value.clone());

        Ok(())
    }
```

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

### Get Owned Version of EpubArchive

Source: https://docs.rs/epub/latest/epub/archive/struct.EpubArchive.html

Creates an owned version of the EpubArchive, typically by cloning. This is part of the `ToOwned` trait implementation.

```rust
type Owned = T
```

```rust
fn to_owned(&self) -> T
```

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

### Manage chapter count and selection

Source: https://docs.rs/epub/latest/epub/doc/struct.EpubDoc.html

Retrieve the total number of chapters or jump to a specific chapter index.

```rust
assert_eq!(17, doc.get_num_chapters());
```

```rust
assert_eq!(0, doc.get_current_chapter());
doc.set_current_chapter(2);
assert_eq!("001.xhtml", doc.get_current_id().unwrap());
assert_eq!(2, doc.get_current_chapter());
assert!(!doc.set_current_chapter(50));
```

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

### Get Resource MIME Type by ID

Source: https://docs.rs/epub/latest/src/epub/doc.rs.html

Retrieves the MIME type of a resource using its ID. Returns None if the resource cannot be found.

```rust
pub fn get_resource_mime(&self, id: &str) -> Option<String> {
        self.resources.get(id).map(|r| r.mime.clone())
    }
```

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

### Opening an EPUB from a Reader

Source: https://docs.rs/epub/latest/epub/doc/struct.EpubDoc.html

Initialize an EpubDoc instance from a type implementing Read and Seek.

```rust
use epub::doc::EpubDoc;
use std::fs::File;
use std::io::{Cursor, Read};

let mut file = File::open("test.epub").unwrap();
let mut buffer = Vec::new();
file.read_to_end(&mut buffer).unwrap();

let cursor = Cursor::new(buffer);

let doc = EpubDoc::from_reader(cursor);
assert!(doc.is_ok());
```

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

### Get Release Identifier

Source: https://docs.rs/epub/latest/src/epub/doc.rs.html

Retrieves the Release Identifier for the EPUB, formatted as 'unique_identifier@dcterms:modified'. This is based on EPUB 3.2 specifications.

```APIDOC
## GET /api/epub/release-identifier

### Description
Retrieves the Release Identifier defined for the EPUB document. This identifier is constructed using the unique identifier and the dcterms:modified date.

### Method
GET

### Endpoint
/api/epub/release-identifier

### Parameters
None

### Request Example
None

### Response
#### Success Response (200)
- **release_identifier** (string) - The formatted release identifier (e.g., "urn:uuid:12345@2023-10-27T10:00:00Z").

#### Response Example
{
  "release_identifier": "urn:uuid:12345@2023-10-27T10:00:00Z"
}
```

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

### EpubArchive<BufReader<File>> Implementations

Source: https://docs.rs/epub/latest/epub/archive/struct.EpubArchive.html

Methods for creating an EpubArchive from a file path.

```APIDOC
## impl EpubArchive<BufReader<File>> 

### `new`

#### `pub fn new<P: AsRef<Path>>(path: P) -> Result<Self, ArchiveError>`

Opens the epub file in `path`.

##### Errors
Returns an error if the zip is broken or if the file doesn’t exists.
```

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

### EpubDoc::mock

Source: https://docs.rs/epub/latest/src/epub/doc.rs.html

Creates a mock EpubDoc instance for testing purposes. It uses a minimal binary data representing an empty zip file.

```APIDOC
## GET /api/products/{id}

### Description
Retrieves the details of a specific product by its ID.

### Method
GET

### Endpoint
/api/products/{id}

### Parameters
#### Path Parameters
- **id** (string) - Required - The unique identifier of the product to retrieve.

### Response
#### Success Response (200)
- **id** (string) - The unique identifier for the product.
- **name** (string) - The name of the product.
- **price** (number) - The price of the product.
- **category** (string) - The category the product belongs to.
- **description** (string) - A detailed description of the product.

#### Response Example
```json
{
  "id": "prod-001",
  "name": "Laptop",
  "price": 1200.00,
  "category": "Electronics",
  "description": "A high-performance laptop with a 15-inch display."
}
```
```

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

### Create EpubArchive from Reader

Source: https://docs.rs/epub/latest/src/epub/archive.rs.html

Initializes an EpubArchive from any reader that implements Read and Seek. It populates the files list by iterating over the zip archive's file names.

```rust
impl<R: Read + Seek> EpubArchive<R> {
    /// Opens the epub contained in `reader`.
    ///
    /// # Errors
    ///
    /// Returns an error if the zip is broken.
    pub fn from_reader(reader: R) -> Result<Self, ArchiveError> {
        let zip = zip::ZipArchive::new(reader)?;

        let files: Vec<String> = zip.file_names().map(String::from).collect();

        Ok(Self {
            zip,
            path: PathBuf::new(),
            files,
        })
    }

```

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

### Managing internal navigation state

Source: https://docs.rs/epub/latest/epub

Use methods like go_next, go_prev, and set_current_chapter to traverse the document structure.

```rust
use epub::doc::EpubDoc;
let doc = EpubDoc::new("test.epub");
let mut doc = doc.unwrap();
assert_eq!(0, doc.get_current_chapter());
assert_eq!("application/xhtml+xml", doc.get_current_mime().unwrap());

doc.go_next();
assert_eq!("000.xhtml", doc.get_current_id().unwrap());
doc.go_next();
assert_eq!("001.xhtml", doc.get_current_id().unwrap());
doc.go_prev();
assert_eq!("000.xhtml", doc.get_current_id().unwrap());

doc.set_current_chapter(2);
assert_eq!("001.xhtml", doc.get_current_id().unwrap());
assert_eq!(2, doc.get_current_chapter());
assert!(!doc.set_current_chapter(50));
```

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

### Get Current Chapter MIME Type

Source: https://docs.rs/epub/latest/src/epub/doc.rs.html

Retrieves the MIME type of the current chapter. Returns None if the EPUB is broken or the current chapter cannot be determined.

```rust
pub fn get_current_mime(&self) -> Option<String> {
        let current_id = self.get_current_id()?;
        self.get_resource_mime(&current_id)
    }
```

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

### EpubArchive<R> Implementations

Source: https://docs.rs/epub/latest/epub/archive/struct.EpubArchive.html

General methods for EpubArchive, applicable when reading from any compatible reader.

```APIDOC
## impl<R: Read + Seek> EpubArchive<R>

### `from_reader`

#### `pub fn from_reader(reader: R) -> Result<Self, ArchiveError>`

Opens the epub contained in `reader`.

##### Errors
Returns an error if the zip is broken.

### `get_entry`

#### `pub fn get_entry<P: AsRef<Path>>( &mut self, name: P, ) -> Result<Vec<u8>, ArchiveError>`

Returns the content of the file by the `name` as `Vec<u8>`.

##### Errors
Returns an error if the name doesn’t exists in the zip archive.

### `get_entry_as_str`

#### `pub fn get_entry_as_str<P: AsRef<Path>>( &mut self, name: P, ) -> Result<String, ArchiveError>`

Returns the content of the file by the `name` as `String`.

##### Errors
Returns an error if the name doesn’t exists in the zip archive.

### `get_container_file`

#### `pub fn get_container_file(&mut self) -> Result<Vec<u8>, ArchiveError>`

Returns the content of container file “META-INF/container.xml”.

##### Errors
Returns an error if the epub doesn’t have the container file.
```

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

### Build EPUB URI

Source: https://docs.rs/epub/latest/src/epub/doc.rs.html

Constructs a URI string for EPUB internal resources. Handles external HTTP links directly and resolves relative paths within the EPUB structure.

```rust
if append.starts_with("http") {
    return String::from(append);
}

let path = path.as_ref();
let mut cpath = path.to_path_buf();

// current file base dir
cpath.pop();
for p in Path::new(append).components() {
    match p {
        Component::ParentDir => {
            cpath.pop();
        }
        Component::Normal(s) => {
            cpath.push(s);
        }
        _ => {} // Ignore other component types like Prefix,RootDir, etc.
    };
}

// If on Windows, replace all Windows path separators with Unix path separators
let path = if cfg!(windows) {
    cpath.to_string_lossy().replace('\\', "/")
} else {
    cpath.to_string_lossy().to_string()
};

format!("epub://{}", path)
```

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

### Accessing EPUB resources

Source: https://docs.rs/epub/latest/epub

Query the resources HashMap to retrieve file paths and MIME types by resource ID.

```rust
assert_eq!(23, doc.resources.len());
let tpage = doc.resources.get("titlepage.xhtml");
assert_eq!(tpage.unwrap().path, Path::new("OEBPS/Text/titlepage.xhtml"));
assert_eq!(tpage.unwrap().mime, "application/xhtml+xml");
```

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

### Implement From Trait

Source: https://docs.rs/epub/latest/epub/doc/struct.MetadataRefinement.html

Allows conversion into MetadataRefinement from itself. This is a standard blanket implementation.

```rust
fn from(t: T) -> T
```

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

### Open EpubArchive from Reader

Source: https://docs.rs/epub/latest/epub/archive/struct.EpubArchive.html

Opens an EPUB contained within a reader. Returns an error if the archive is corrupted.

```rust
pub fn from_reader(reader: R) -> Result<Self, ArchiveError>
```

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

### Accessing EPUB Metadata

Source: https://docs.rs/epub/latest/src/epub/doc.rs.html

Demonstrates how to retrieve a specific metadata item, such as the document title, from the metadata collection.

```rust
# use epub::doc::EpubDoc;
# let doc = EpubDoc::new("test.epub");
# let doc = doc.unwrap();
let title = doc.metadata.iter().find(|d| d.property == "title");
assert_eq!(title.unwrap().value, "Todo es mío");
```

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

### Navigate EPUB Document State

Source: https://docs.rs/epub/latest/epub/index.html

Manages the internal state of the EPUB document, including current chapter, MIME type, and navigation using go_next, go_prev, and set_current_chapter.

```rust
use epub::doc::EpubDoc;
let doc = EpubDoc::new("test.epub");
let mut doc = doc.unwrap();
assert_eq!(0, doc.get_current_chapter());
assert_eq!("application/xhtml+xml", doc.get_current_mime().unwrap());

doc.go_next();
assert_eq!("000.xhtml", doc.get_current_id().unwrap());
doc.go_next();
assert_eq!("001.xhtml", doc.get_current_id().unwrap());
doc.go_prev();
assert_eq!("000.xhtml", doc.get_current_id().unwrap());

doc.set_current_chapter(2);
assert_eq!("001.xhtml", doc.get_current_id().unwrap());
assert_eq!(2, doc.get_current_chapter());
assert!(!doc.set_current_chapter(50));

// doc.get_current() will return a Vec<u8> with the current chapter content
// doc.get_current_str() will return a String with the current chapter content
```

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

### Access EPUB Resources

Source: https://docs.rs/epub/latest/src/epub/lib.rs.html

Shows how to access the resources within an EPUB file, which are stored in a HashMap. It checks the total number of resources and verifies the path and MIME type for a specific resource ('titlepage.xhtml').

```rust
# use epub::doc::EpubDoc;
# use std::path::Path;
# let doc = EpubDoc::new("test.epub");
# let doc = doc.unwrap();
assert_eq!(23, doc.resources.len());
let tpage = doc.resources.get("titlepage.xhtml");
assert_eq!(tpage.unwrap().path, Path::new("OEBPS/Text/titlepage.xhtml"));
assert_eq!(tpage.unwrap().mime, "application/xhtml+xml");
```

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

### Get Current Chapter Content

Source: https://docs.rs/epub/latest/src/epub/doc.rs.html

Retrieves the byte content and MIME type of the current chapter. The current chapter is determined by the EPUB spine order and can be changed using navigation methods. Returns None if the EPUB is broken.

```rust
pub fn get_current(&mut self) -> Option<(Vec<u8>, String)> {
        let current_id = self.get_current_id()?;
        self.get_resource(&current_id)
    }
```

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

### Implement CloneToUninit Trait (Nightly)

Source: https://docs.rs/epub/latest/epub/doc/struct.MetadataRefinement.html

Experimental nightly feature for copying MetadataRefinement to uninitialized memory. Use with caution.

```rust
unsafe fn clone_to_uninit(&self, dest: *mut u8)
```

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

### Implement Any Trait

Source: https://docs.rs/epub/latest/epub/doc/struct.MetadataRefinement.html

Provides runtime type information for MetadataRefinement. This is a blanket implementation for any type that is 'static and Send + Sync + Unpin.

```rust
fn type_id(&self) -> TypeId
```

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

### Navigate EPUB Spine

Source: https://docs.rs/epub/latest/src/epub/lib.rs.html

Demonstrates accessing the spine of an EPUB document, which is a list of resource IDs representing the reading order. It asserts the total number of items in the spine and the ID of the first item.

```rust
# use epub::doc::EpubDoc;
# let doc = EpubDoc::new("test.epub");
# let doc = doc.unwrap();
assert_eq!(17, doc.spine.len());
assert_eq!("titlepage.xhtml", doc.spine[0].idref);
```

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

### Navigate to Next Chapter in EPUB

Source: https://docs.rs/epub/latest/src/epub/doc.rs.html

Advances to the next chapter in the EPUB. Returns `false` if the current chapter is the last one.

```rust
# use epub::doc::EpubDoc;
# let doc = EpubDoc::new("test.epub");
# let mut doc = doc.unwrap();
doc.go_next();
assert_eq!("000.xhtml", doc.get_current_id().unwrap());

let len = doc.spine.len();
for i in 1..len {
    doc.go_next();
}
assert!(!doc.go_next());
```

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

### Navigate to Previous Chapter in EPUB

Source: https://docs.rs/epub/latest/src/epub/doc.rs.html

Reverts to the previous chapter in the EPUB. Returns `false` if the current chapter is the first one.

```rust
# use epub::doc::EpubDoc;
# let doc = EpubDoc::new("test.epub");
# let mut doc = doc.unwrap();
assert!(!doc.go_prev());

doc.go_next(); // 000.xhtml
doc.go_next(); // 001.xhtml
doc.go_next(); // 002.xhtml
doc.go_prev(); // 001.xhtml
assert_eq!("001.xhtml", doc.get_current_id().unwrap());
```

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

### Implement Into Trait

Source: https://docs.rs/epub/latest/epub/doc/struct.MetadataRefinement.html

Allows conversion from MetadataRefinement to itself. This relies on the From trait implementation.

```rust
fn into(self) -> U
```

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

### EPUB Structs

Source: https://docs.rs/epub/latest/epub/all.html

Lists the available structs for representing EPUB data.

```APIDOC
## EPUB Structs

### Structs

- **archive::EpubArchive**: Represents an EPUB archive.
- **doc::EpubDoc**: Represents an EPUB document.
- **doc::MetadataItem**: Represents a metadata item within an EPUB.
- **doc::MetadataRefinement**: Represents a refinement of metadata.
- **doc::NavPoint**: Represents a navigation point in the EPUB.
- **doc::ResourceItem**: Represents a resource item within an EPUB.
- **doc::SpineItem**: Represents an item in the EPUB spine.
```

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

### Convert File Path Separators on Windows

Source: https://docs.rs/epub/latest/src/epub/doc.rs.html

Converts Windows-style backslashes in a file path to forward slashes for compatibility with ZipArchive on Windows.

```rust
let mut path = self.root_base.join(href);
if cfg!(windows) {
path = PathBuf::from(path.to_string_lossy().replace('\\', "/"));
}
```

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

### Retrieve Resource Path from EPUB

Source: https://docs.rs/epub/latest/src/epub/doc.rs.html

Fetches the file path of a resource within the EPUB using its ID.

```rust
self.resources.get(&current_id).map(|r| r.path.clone())
```

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

### EpubArchive::get_container_file

Source: https://docs.rs/epub/latest/src/epub/archive.rs.html

Retrieves the content of the 'META-INF/container.xml' file.

```APIDOC
## EpubArchive::get_container_file

### Description
Returns the content of container file "META-INF/container.xml".

### Method
`pub fn get_container_file(&mut self) -> Result<Vec<u8>, ArchiveError>`

### Endpoint
N/A (Archive Internal Operation)

### Parameters
N/A

### Request Body
N/A

### Response
#### Success Response (Vec<u8>)
- **Vec<u8>** - A vector of bytes representing the content of the container.xml file.

#### Errors
- **ArchiveError::Zip** - If the container.xml file is not found in the archive or if there's a zip-related error.

### Request Example
```rust
let mut archive = EpubArchive::new("path/to/your/epub.epub")?;
let container_content = archive.get_container_file()?;
```

### Response Example
```rust
// On success:
// Ok(vec![... bytes of container.xml ...])

// On error:
// Err(ArchiveError::Zip(zip::result::ZipError::FileNotFound))
```
```

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

### Implement Clone for MetadataRefinement

Source: https://docs.rs/epub/latest/epub/doc/struct.MetadataRefinement.html

Provides functionality to duplicate MetadataRefinement values. This allows creating a copy of an existing metadata refinement.

```rust
fn clone(&self) -> MetadataRefinement
```

```rust
fn clone_from(&mut self, source: &Self)
```

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

### Chapter Navigation API

Source: https://docs.rs/epub/latest/epub/doc/struct.EpubDoc.html

Methods for retrieving current chapter information and navigating through the EPUB spine.

```APIDOC
## GET /current

### Description
Returns the current chapter content and mime-type based on the epub spine order.

### Response
#### Success Response (200)
- **content** (Vec<u8>) - The chapter content.
- **mime-type** (String) - The chapter mime-type.

---

## POST /navigation/next

### Description
Changes the current chapter to the next one in the spine.

### Response
#### Success Response (200)
- **result** (bool) - Returns true if successful, false if the current chapter is the last one.

---

## POST /navigation/chapter/{n}

### Description
Sets the current chapter by index.

### Parameters
#### Path Parameters
- **n** (usize) - Required - The chapter index starting from 0.

### Response
#### Success Response (200)
- **result** (bool) - Returns true if successful, false if the index is out of bounds.
```

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

### Implement Debug for MetadataRefinement

Source: https://docs.rs/epub/latest/epub/doc/struct.MetadataRefinement.html

Enables debugging output for MetadataRefinement. This allows the struct to be formatted for debugging purposes.

```rust
fn fmt(&self, f: &mut Formatter<'_>) -> Result
```

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

### Define EpubVersion Enum

Source: https://docs.rs/epub/latest/epub/doc/enum.EpubVersion.html

Represents the supported EPUB versions within the epub crate.

```rust
pub enum EpubVersion {
    Version2_0,
    Version3_0,
    Unknown(String),
}
```

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

### EpubArchive::from_reader

Source: https://docs.rs/epub/latest/src/epub/archive.rs.html

Opens an EPUB from a reader.

```APIDOC
## EpubArchive::from_reader

### Description
Opens the epub contained in `reader`.

### Method
`pub fn from_reader(reader: R) -> Result<Self, ArchiveError>` where R: Read + Seek

### Endpoint
N/A (Reader Operation)

### Parameters
#### Path Parameters
N/A

#### Query Parameters
N/A

#### Request Body
N/A

### Request Example
```rust
use std::fs::File;
use std::io::BufReader;

let file = File::open("path/to/your/epub.epub")?;
let reader = BufReader::new(file);
let archive = EpubArchive::from_reader(reader);
```

### Response
#### Success Response (Self)
- **EpubArchive<R>** - An instance of EpubArchive created from the provided reader.

#### Errors
- **ArchiveError::Zip** - If the zip archive is broken.

### Response Example
```rust
// On success:
// Ok(EpubArchive { ... })

// On error:
// Err(ArchiveError::Zip(zip::result::ZipError))
```
```

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

### Navigating via spine

Source: https://docs.rs/epub/latest/epub

Access the spine vector to retrieve resource IDs in reading order.

```rust
assert_eq!(17, doc.spine.len());
assert_eq!("titlepage.xhtml", doc.spine[0].idref);
```

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

### MetadataItem Implementations

Source: https://docs.rs/epub/latest/epub/doc/struct.MetadataItem.html

Available implementations and methods for the MetadataItem struct.

```APIDOC
## impl MetadataItem

### `refinement(&self, property: &str) -> Option<&MetadataRefinement>`
Returns a reference to a `MetadataRefinement` if it matches the given property, otherwise returns `None`.
```

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

### Extracting the cover image

Source: https://docs.rs/epub/latest/epub

Retrieve the cover data as a byte vector and write it to a file.

```rust
use std::fs;
use std::io::Write;
use epub::doc::EpubDoc;

let doc = EpubDoc::new("test.epub");
assert!(doc.is_ok());
let mut doc = doc.unwrap();

let cover_data = doc.get_cover().unwrap();

let f = fs::File::create("/tmp/cover.png");
assert!(f.is_ok());
let mut f = f.unwrap();
let resp = f.write_all(&cover_data);
```

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

### NavPoint Trait Implementations

Source: https://docs.rs/epub/latest/epub/doc/struct.NavPoint.html

Details the various trait implementations for the NavPoint struct, such as Clone, Debug, Ord, PartialEq, and PartialOrd.

```APIDOC
### Trait Implementations for NavPoint

#### Clone
- `clone(&self) -> NavPoint`: Returns a duplicate of the value.
- `clone_from(&mut self, source: &Self)`: Performs copy-assignment from `source`.

#### Debug
- `fmt(&self, f: &mut Formatter<'_>) -> Result`: Formats the value using the given formatter.

#### Ord
- `cmp(&self, other: &Self) -> Ordering`: Compares `self` and `other` and returns an `Ordering`.
- `max(self, other: Self) -> Self`: Compares and returns the maximum of two values.
- `min(self, other: Self) -> Self`: Compares and returns the minimum of two values.
- `clamp(self, min: Self, max: Self) -> Self`: Restricts a value to a certain interval.

#### PartialEq
- `eq(&self, other: &Self) -> bool`: Tests if `self` and `other` values are equal.
- `ne(&self, other: &Rhs) -> bool`: Tests for inequality (`!=`).

#### PartialOrd
- `partial_cmp(&self, other: &Self) -> Option<Ordering>`: Returns an ordering between `self` and `other` if one exists.
- `lt(&self, other: &Rhs) -> bool`: Tests less than (`<`).
- `le(&self, other: &Rhs) -> bool`: Tests less than or equal to (`<=`).
- `gt(&self, other: &Rhs) -> bool`: Tests greater than (`>`).
- `ge(&self, other: &Rhs) -> bool`: Tests greater than or equal to (`>=`).

#### Eq
- Implemented for NavPoint.
```

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

### EPUB Enums

Source: https://docs.rs/epub/latest/epub/doc/index.html

This section describes the enumerations used within the epub crate.

```APIDOC
## Enums

### DocError

### EpubVersion

```

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

### Resource Access Methods

Source: https://docs.rs/epub/latest/epub/doc/struct.EpubDoc.html

Methods for retrieving content and metadata for specific resources within the EPUB archive.

```APIDOC
## GET /resource/{id}

### Description
Returns the resource content and mime-type by the id defined in the spine.

### Parameters
#### Path Parameters
- **id** (str) - Required - The resource identifier defined in the spine.

### Response
#### Success Response (200)
- **content** (Vec<u8>) - The resource content.
- **mime-type** (String) - The resource mime-type.

---

## GET /resource/path/{path}

### Description
Returns the resource content by full path in the epub archive.

### Parameters
#### Path Parameters
- **path** (Path) - Required - The full path of the resource in the epub archive.

### Response
#### Success Response (200)
- **content** (String) - The resource content as a string.
```