cli/src/args/message.rs

use clap::{ArgGroup, Args, Subcommand};
use iggy::error::IggyError;
use iggy::error::IggyError::InvalidFormat;
use iggy::identifier::Identifier;
use iggy::models::header::{HeaderKey, HeaderValue};
use std::str::FromStr;

#[derive(Debug, Clone, Subcommand)]
pub(crate) enum MessageAction {
    /// Send messages to given topic ID and given stream ID
    ///
    /// Stream ID can be specified as a stream name or ID
    /// Topic ID can be specified as a topic name or ID
    ///
    /// Examples
    ///  iggy message send 1 2 message
    ///  iggy message send stream 2 "long message"
    ///  iggy message send 1 topic message1 message2 message3
    ///  iggy message send stream topic "long message with spaces"
    #[clap(verbatim_doc_comment, visible_alias = "s")]
    Send(SendMessagesArgs),
    /// Poll messages from given topic ID and given stream ID
    ///
    /// Stream ID can be specified as a stream name or ID
    /// Topic ID can be specified as a topic name or ID
    ///
    /// Examples:
    ///  iggy message poll --offset 0 1 2 1
    ///  iggy message poll --offset 0 stream 2 1
    ///  iggy message poll --offset 0 1 topic 1
    ///  iggy message poll --offset 0 stream topic 1
    #[clap(verbatim_doc_comment, visible_alias = "p")]
    Poll(PollMessagesArgs),
}

#[derive(Debug, Clone, Args)]
pub(crate) struct SendMessagesArgs {
    /// ID of the stream to which the message will be sent
    ///
    /// Stream ID can be specified as a stream name or ID
    #[arg(value_parser = clap::value_parser!(Identifier))]
    pub(crate) stream_id: Identifier,
    /// ID of the topic to which the message will be sent
    ///
    /// Topic ID can be specified as a topic name or ID
    #[arg(value_parser = clap::value_parser!(Identifier))]
    pub(crate) topic_id: Identifier,
    /// ID of the partition to which the message will be sent
    #[clap(short, long, group = "partitioning")]
    pub(crate) partition_id: Option<u32>,
    /// Messages key which will be used to partition the messages
    ///
    /// Value of the key will be used by the server to calculate the partition ID
    #[clap(verbatim_doc_comment)]
    #[clap(short, long, group = "partitioning")]
    pub(crate) message_key: Option<String>,
    /// Messages to be sent
    ///
    /// If no messages are provided, the command will read the messages from the
    /// standard input and each line will be sent as a separate message.
    /// If messages are provided, they will be sent as is. If message contains
    /// spaces, it should be enclosed in quotes. Limit of the messages and size
    /// of each message is defined by the used shell.
    #[clap(verbatim_doc_comment)]
    pub(crate) messages: Option<Vec<String>>,

    /// Comma separated list of key:kind:value, sent as header with the message
    ///
    /// Headers are comma seperated key-value pairs that can be sent with the message.
    /// Kind can be one of the following: raw, string, bool, int8, int16, int32, int64,
    /// int128, uint8, uint16, uint32, uint64, uint128, float32, float64
    #[clap(verbatim_doc_comment)]
    #[clap(short = 'H', long, value_parser = parse_key_val, value_delimiter = ',')]
    pub(crate) headers: Vec<(HeaderKey, HeaderValue)>,
}

/// Parse Header Key, Kind and Value from the string separated by a ':'
fn parse_key_val(s: &str) -> Result<(HeaderKey, HeaderValue), IggyError> {
    let lower = s.to_lowercase();
    let parts = lower.split(':').collect::<Vec<_>>();

    if parts.len() != 3 {
        Err(InvalidFormat)?;
    }

    let key = HeaderKey::from_str(parts[0])?;
    let value = HeaderValue::from_kind_str_and_value_str(parts[1], parts[2])?;
    Ok((key, value))
}

#[derive(Debug, Clone, Args)]
#[command(group = ArgGroup::new("polling_strategy").required(true))]
pub(crate) struct PollMessagesArgs {
    /// ID of the stream from which message will be polled
    ///
    /// Stream ID can be specified as a stream name or ID
    #[arg(value_parser = clap::value_parser!(Identifier))]
    pub(crate) stream_id: Identifier,
    /// ID of the topic from which message will be polled
    ///
    /// Topic ID can be specified as a topic name or ID
    #[arg(value_parser = clap::value_parser!(Identifier))]
    pub(crate) topic_id: Identifier,
    /// Partition ID from which message will be polled
    #[arg(value_parser = clap::value_parser!(u32).range(1..))]
    pub(crate) partition_id: u32,
    /// Number of messages to poll
    #[clap(verbatim_doc_comment)]
    #[clap(short, long, default_value_t = 1, value_parser = clap::value_parser!(u32).range(1..))]
    pub(crate) message_count: u32,
    /// Auto commit offset
    ///
    /// Flag indicates whether to commit offset on the server automatically
    /// after polling the messages.
    #[clap(verbatim_doc_comment)]
    #[clap(short, long, default_value_t = false)]
    pub(crate) auto_commit: bool,
    /// Polling strategy - offset to start polling messages from
    ///
    /// Offset must be specified as a number
    #[clap(verbatim_doc_comment)]
    #[clap(short, long, group = "polling_strategy")]
    pub(crate) offset: Option<u64>,
    /// Polling strategy - start polling from the first message in the partition
    #[clap(verbatim_doc_comment)]
    #[clap(short, long, default_value_t = false, group = "polling_strategy")]
    pub(crate) first: bool,
    /// Polling strategy - start polling from the last message in the partition
    #[clap(verbatim_doc_comment)]
    #[clap(short, long, default_value_t = false, group = "polling_strategy")]
    pub(crate) last: bool,
    /// Polling strategy - start polling from the next message
    ///
    /// Start polling after the last polled message based
    /// on the stored consumer offset
    #[clap(verbatim_doc_comment)]
    #[clap(short, long, default_value_t = false, group = "polling_strategy")]
    pub(crate) next: bool,
    /// Regular consumer which will poll messages
    ///
    /// Consumer ID can be specified as a consumer name or ID
    #[clap(verbatim_doc_comment)]
    #[clap(short, long, default_value_t = Identifier::default(), value_parser = clap::value_parser!(Identifier))]
    pub(crate) consumer: Identifier,

    /// Include the message headers in the output
    ///
    /// Flag indicates whether to include headers in the output
    /// after polling the messages.
    #[clap(verbatim_doc_comment)]
    #[clap(short, long, default_value_t = false)]
    pub(crate) show_headers: bool,
}

#[cfg(test)]
mod tests {
    use super::*;
    use std::str::FromStr;

    #[test]
    fn parse_key_val_should_parse_string() {
        let expected_value: &str = "value";
        let result = parse_key_val(&format!("key:String:{}", expected_value));
        assert!(result.is_ok());
        let (key, value) = result.unwrap();
        assert_eq!(key, HeaderKey::from_str("key").unwrap());
        assert_eq!(value.as_str().unwrap(), expected_value);
    }

    #[test]
    fn parse_key_val_should_parse_uint8() {
        let expected_value: u8 = 4;
        let result = parse_key_val(&format!("key:uint8:{}", expected_value));
        assert!(result.is_ok());
        let (key, value) = result.unwrap();
        assert_eq!(key, HeaderKey::from_str("key").unwrap());
        assert_eq!(value.as_uint8().unwrap(), expected_value);
    }

    #[test]
    fn parse_key_val_should_parse_float64() {
        let expected_value: f64 = 42.0;
        let result = parse_key_val(&format!("key:float64:{}", expected_value));
        assert!(result.is_ok());
        let (key, value) = result.unwrap();
        assert_eq!(key, HeaderKey::from_str("key").unwrap());
        assert_eq!(value.as_float64().unwrap(), expected_value);
    }

    #[test]
    fn parse_key_val_should_parse_bool() {
        let expected_value = true;
        let result = parse_key_val(&format!("key:bool:{}", expected_value));
        assert!(result.is_ok());
        let (key, value) = result.unwrap();
        assert_eq!(key, HeaderKey::from_str("key").unwrap());
        assert_eq!(value.as_bool().unwrap(), expected_value);
    }

    #[test]
    fn parse_key_val_to_less_params_should_return_err() {
        let result = parse_key_val("key:string");
        assert!(result.is_err());
    }

    #[test]
    fn parse_key_val_wrong_kind_should_return_err() {
        let result = parse_key_val("key:strin:value");
        assert!(result.is_err());
    }

    #[test]
    fn parse_key_val_no_matching_value_should_return_err() {
        let result = parse_key_val("key:uint8:69.42");
        assert!(result.is_err());
    }
}