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//! A license library.

#[macro_use]
extern crate bitflags;

mod apache2;
pub mod conditions;
mod kind;
pub mod limitations;
mod mit;
pub mod permissions;

pub use apache2::Apache2;
pub use kind::LicenseKind;
pub use mit::Mit;

use std::ffi::OsStr;

use conditions::Conditions;
use limitations::Limitations;
use permissions::Permissions;

/// Trait implemented by all licenses.
pub trait License {
    /// The name of the license.
    ///
    /// Corresponds to the *Full name* column from https://spdx.org/licenses/.
    fn name(&self) -> &str;

    /// The identifier of the license.
    ///
    /// Corresponds to the *Identifier* column from https://spdx.org/licenses/.
    fn id(&self) -> &str;

    /// Says if the license is OSI approved.
    ///
    /// Corresponds to the *OSI Approved?* column from https://spdx.org/licenses/.
    fn is_osi_approved(&self) -> bool;

    /// The license text.
    fn license(&self) -> &str;

    /// The permissions of the license.
    fn permissions(&self) -> Permissions;

    /// The conditions of the license.
    fn conditions(&self) -> Conditions;

    /// The limitations of the license.
    fn limitations(&self) -> Limitations;

    /// The homepage of the license.
    #[inline]
    fn homepage(&self) -> Option<&str> {
        None
    }
}

impl License for Box<License> {
    #[inline]
    fn name(&self) -> &str {
        (**self).name()
    }

    #[inline]
    fn id(&self) -> &str {
        (**self).id()
    }

    #[inline]
    fn is_osi_approved(&self) -> bool {
        (**self).is_osi_approved()
    }

    #[inline]
    fn license(&self) -> &str {
        (**self).license()
    }

    #[inline]
    fn permissions(&self) -> Permissions {
        (**self).permissions()
    }

    #[inline]
    fn conditions(&self) -> Conditions {
        (**self).conditions()
    }

    #[inline]
    fn limitations(&self) -> Limitations {
        (**self).limitations()
    }

    #[inline]
    fn homepage(&self) -> Option<&str> {
        (**self).homepage()
    }
}

impl AsRef<str> for Box<License> {
    fn as_ref(&self) -> &str {
        self.license()
    }
}

impl AsRef<OsStr> for Box<License> {
    fn as_ref(&self) -> &OsStr {
        self.license().as_ref()
    }
}

impl AsRef<[u8]> for Box<License> {
    fn as_ref(&self) -> &[u8] {
        self.license().as_ref()
    }
}

impl<'a> License for &'a License {
    #[inline]
    fn name(&self) -> &str {
        (**self).name()
    }

    #[inline]
    fn id(&self) -> &str {
        (**self).id()
    }

    #[inline]
    fn is_osi_approved(&self) -> bool {
        (**self).is_osi_approved()
    }

    #[inline]
    fn license(&self) -> &str {
        (**self).license()
    }

    #[inline]
    fn permissions(&self) -> Permissions {
        (**self).permissions()
    }

    #[inline]
    fn conditions(&self) -> Conditions {
        (**self).conditions()
    }

    #[inline]
    fn limitations(&self) -> Limitations {
        (**self).limitations()
    }

    #[inline]
    fn homepage(&self) -> Option<&str> {
        (**self).homepage()
    }
}

impl<'a> AsRef<str> for &'a License {
    fn as_ref(&self) -> &str {
        self.license()
    }
}

impl<'a> AsRef<OsStr> for &'a License {
    fn as_ref(&self) -> &OsStr {
        self.license().as_ref()
    }
}

impl<'a> AsRef<[u8]> for &'a License {
    fn as_ref(&self) -> &[u8] {
        self.license().as_ref()
    }
}