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use std::convert::TryFrom;
use ntex::util::{Bytes, HashMap};
use super::{utils, Command, CommandError};
use crate::codec::{BulkString, Request, Response};
/// HGET redis command
///
/// Returns the value associated with field in the hash stored at key.
///
/// ```rust
/// use ntex_redis::{cmd, RedisConnector};
/// # use rand::{thread_rng, Rng, distributions::Alphanumeric};
/// # fn gen_random_key() -> String {
/// # thread_rng().sample_iter(&Alphanumeric).take(12).map(char::from).collect::<String>()
/// # }
///
/// #[ntex::main]
/// async fn main() -> Result<(), Box<dyn std::error::Error>> {
/// let redis = RedisConnector::new("127.0.0.1:6379").connect().await?;
/// let key = gen_random_key();
///
/// // create hashmap
/// redis.exec(cmd::HSet(&key, "test-key", "value")).await?;
///
/// // get field value
/// let value = redis.exec(cmd::HGet(&key, "test-key")).await?;
///
/// assert_eq!(value.unwrap(), "value");
/// Ok(())
/// }
/// ```
pub fn HGet<T, V>(key: T, field: V) -> utils::BulkOutputCommand
where
BulkString: From<T> + From<V>,
{
utils::BulkOutputCommand(Request::Array(vec![
Request::from_static("HGET"),
Request::BulkString(key.into()),
Request::BulkString(field.into()),
]))
}
/// HGETALL redis command
///
/// Returns all fields and values of the hash stored at `key`
pub fn HGetAll<T>(key: T) -> HGetAllCommand
where
BulkString: From<T>,
{
HGetAllCommand(vec![
Request::from_static("HGETALL"),
Request::BulkString(key.into()),
])
}
pub struct HGetAllCommand(Vec<Request>);
impl Command for HGetAllCommand {
type Output = HashMap<Bytes, Bytes>;
fn to_request(self) -> Request {
Request::Array(self.0)
}
fn to_output(val: Response) -> Result<Self::Output, CommandError> {
Ok(HashMap::try_from(val)?)
}
}
/// HSET redis command
///
/// Sets field in the hash stored at key to value.
///
/// ```rust
/// use ntex_redis::{cmd, RedisConnector};
/// # use rand::{thread_rng, Rng, distributions::Alphanumeric};
/// # fn gen_random_key() -> String {
/// # thread_rng().sample_iter(&Alphanumeric).take(12).map(char::from).collect::<String>()
/// # }
///
/// #[ntex::main]
/// async fn main() -> Result<(), Box<dyn std::error::Error>> {
/// let redis = RedisConnector::new("127.0.0.1:6379").connect().await?;
/// let key = gen_random_key();
///
/// // create hashmap and set field
/// redis.exec(cmd::HSet(&key, "test-key", "value")).await?;
///
/// // get field value
/// let value = redis.exec(cmd::HGet(&key, "test-key")).await?;
///
/// assert_eq!(value.unwrap(), "value");
/// Ok(())
/// }
/// ```
pub fn HSet<T, K, V>(key: T, field: K, value: V) -> HSetCommand
where
BulkString: From<T> + From<K> + From<V>,
{
HSetCommand(vec![
Request::from_static("HSET"),
Request::BulkString(key.into()),
Request::BulkString(field.into()),
Request::BulkString(value.into()),
])
}
pub struct HSetCommand(Vec<Request>);
impl HSetCommand {
/// Insert new entry to a redis hashmap
pub fn entry<K, V>(mut self, field: K, value: V) -> Self
where
BulkString: From<K> + From<V>,
{
self.0.push(field.into());
self.0.push(value.into());
self
}
/// Insert new entry to a redis hashmap
pub fn add_entry<K, V>(&mut self, field: K, value: V)
where
BulkString: From<K> + From<V>,
{
self.0.push(field.into());
self.0.push(value.into());
}
}
impl Command for HSetCommand {
type Output = usize;
fn to_request(self) -> Request {
Request::Array(self.0)
}
fn to_output(val: Response) -> Result<Self::Output, CommandError> {
match val {
Response::Integer(val) => Ok(val as usize),
_ => Err(CommandError::Output("Cannot parse response", val)),
}
}
}
/// HDEL redis command
///
/// Removes the specified fields from the hash stored at key.
///
/// ```rust
/// use ntex_redis::{cmd, RedisConnector};
/// # use rand::{thread_rng, Rng, distributions::Alphanumeric};
/// # fn gen_random_key() -> String {
/// # thread_rng().sample_iter(&Alphanumeric).take(12).map(char::from).collect::<String>()
/// # }
///
/// #[ntex::main]
/// async fn main() -> Result<(), Box<dyn std::error::Error>> {
/// let redis = RedisConnector::new("127.0.0.1:6379").connect().await?;
/// let key = gen_random_key();
///
/// // create hashmap and set field
/// redis.exec(cmd::HSet(&key, "test-key", "value")).await?;
///
/// // delete hashmap field
/// let value = redis.exec(cmd::HDel(&key, "test-key")).await?;
///
/// assert_eq!(value, 1);
/// Ok(())
/// }
/// ```
pub fn HDel<T, K>(key: T, field: K) -> HDelCommand
where
BulkString: From<T> + From<K>,
{
HDelCommand(vec![
Request::from_static("HDEL"),
Request::BulkString(key.into()),
Request::BulkString(field.into()),
])
}
pub struct HDelCommand(Vec<Request>);
impl HDelCommand {
/// Remove field
pub fn remove<K>(mut self, field: K) -> Self
where
BulkString: From<K>,
{
self.0.push(field.into());
self
}
/// Add more fields to remove
pub fn remove_all<T>(mut self, other: impl IntoIterator<Item = T>) -> Self
where
BulkString: From<T>,
{
self.0.extend(other.into_iter().map(|t| t.into()));
self
}
}
impl Command for HDelCommand {
type Output = usize;
fn to_request(self) -> Request {
Request::Array(self.0)
}
fn to_output(val: Response) -> Result<Self::Output, CommandError> {
match val {
Response::Integer(val) => Ok(val as usize),
_ => Err(CommandError::Output("Cannot parse response", val)),
}
}
}
/// HLEN redis command
///
/// Returns the number of fields contained in the hash stored at key.
///
/// ```rust
/// use ntex_redis::{cmd, RedisConnector};
/// # use rand::{thread_rng, Rng, distributions::Alphanumeric};
/// # fn gen_random_key() -> String {
/// # thread_rng().sample_iter(&Alphanumeric).take(12).map(char::from).collect::<String>()
/// # }
///
/// #[ntex::main]
/// async fn main() -> Result<(), Box<dyn std::error::Error>> {
/// let redis = RedisConnector::new("127.0.0.1:6379").connect().await?;
/// let key = gen_random_key();
///
/// // create hashmap and set field
/// redis.exec(cmd::HSet(&key, "test-key", "value")).await?;
///
/// // get len of hashmap
/// let value = redis.exec(cmd::HLen(&key)).await?;
///
/// assert_eq!(value, 1);
/// Ok(())
/// }
/// ```
pub fn HLen<T>(key: T) -> utils::IntOutputCommand
where
BulkString: From<T>,
{
utils::IntOutputCommand(Request::Array(vec![
Request::from_static("HLEN"),
Request::BulkString(key.into()),
]))
}
/// HINCRBY redis command
///
/// Increments the number stored at `field` in the hash stored at `key` by `increment`.
pub fn HIncrBy<T, K, I>(key: T, field: K, increment: I) -> utils::IntOutputCommand
where
BulkString: From<T> + From<K>,
i64: From<I>,
{
utils::IntOutputCommand(Request::Array(vec![
Request::from_static("HINCRBY"),
Request::BulkString(key.into()),
Request::BulkString(field.into()),
Request::BulkString(i64::from(increment).to_string().into()),
]))
}