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use std::collections::HashSet;
use std::convert::TryFrom;
use rusqlite::params;
use crate::database::Db;
use crate::id::Id;
use crate::result::RudeResult;
use crate::try_log;
use crate::world::Zone;
impl Db {
/// Get root zone
pub fn root_zone(&self, zone: &Zone) -> RudeResult<Zone> {
let mut zone: Zone = zone.into();
// loop until find the root
loop {
zone = match self.load_zone(zone.id) {
Ok(Some(z)) => z,
Ok(None) => {
log::error!(
"{}({}) :: Can't find parent zone :: None value",
file!(),
line!()
);
return Err(Box::from("None value"));
}
Err(e) => return Err(e),
};
if zone.id == zone.parent {
return Ok(zone);
}
}
}
/// Save a zone to the database.
pub fn save_zone(&self, zone: &Zone) -> RudeResult<()> {
let mut statement = try_log!(
self.0.prepare(
"insert into zones (id, parent, name, users_visible) values (?, ?, ?, ?) on conflict(id) do update set id=?, parent=?, name=?, users_visible=?;"
),
"Unable to prepare sql statement"
);
let _ = try_log!(
statement.execute(params![
zone.id,
zone.parent,
zone.name,
zone.users_visible,
zone.id,
zone.parent,
zone.name,
zone.users_visible,
]),
"Unable to perform query"
);
Ok(())
}
/// Load a zone from the database.
pub fn load_zone(&self, id: Id) -> RudeResult<Option<Zone>> {
let mut statement = try_log!(
self.0
.prepare("select id, parent, name, users_visible from zones where id = ?"),
"Unable to prepare sql statement"
);
let mut rows = try_log!(statement.query(params![id]), "Unable to perform query");
let mut zone = if let Some(row) = try_log!(rows.next(), "Unable to retrieve row") {
try_log!(Zone::try_from(row), "Unable to get Zone from Row")
} else {
return Ok(None);
};
zone.areas = {
let mut a = HashSet::new();
let mut statement = try_log!(
self.0.prepare("select id from zones where parent = ?;"),
"Unable to prepare sql statement"
);
let mut rows = try_log!(statement.query(params![id]), "Unable to perform query");
while let Some(row) = try_log!(rows.next(), "Unable to retrieve row") {
let new_id = try_log!(row.get(0), "Unable to retrieve field");
if new_id != id {
a.insert(new_id);
}
}
let mut statement = try_log!(
self.0.prepare("select id from rooms where zone = ?;"),
"Unable to prepare sql statement"
);
let mut rows = try_log!(statement.query(params![id]), "Unable to perform query");
while let Some(row) = try_log!(rows.next(), "Unable to retrieve row") {
a.insert(try_log!(row.get(0), "Unable to retrieve field"));
}
a
};
Ok(Some(zone))
}
}