use crate::models::users::User;
use crate::schema::characters;
use serde_derive::Serialize;

/// An entry that appears in a user's character list. Properties are
/// in order of table columns.
#[derive(Serialize, Debug, Queryable)]
pub struct CharacterEntry {
    pub id: i32,
    pub user_id: i32,
    pub viewable: bool,
    pub name: String,
    //TODO don't need to carry around character data for this.
    pub data: Option<Vec<u8>>,
}

impl CharacterEntry {
    /// Transform to an Option that holds the character, if the
    /// character is viewable to a potentially existing user. A
    /// character is "visible" if the public viewable property is set
    /// to true, or the user is the owner of the character. Consumes
    /// self.
    pub fn as_visible_for(self, user: Option<&User>) -> Option<CharacterEntry> {
        let character_is_visible = |c: CharacterEntry| {
            if c.viewable || user.map(|u| u.id) == Some(c.user_id) {
                Some(c)
            } else {
                None
            }
        };

        Some(self).and_then(character_is_visible)
    }
}

/// Represents insert of a new character into the database. Property
/// names correspond to columns.
#[derive(Insertable)]
#[table_name = "characters"]
pub struct NewCharacter<'a> {
    pub user_id: i32,
    pub viewable: bool,
    pub character_name: &'a str,
    pub character_data: &'a [u8],
}