mirror of https://github.com/mastodon/flodgatt
51 lines
1.9 KiB
Rust
51 lines
1.9 KiB
Rust
use std::{error::Error, fmt};
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#[derive(Debug)]
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pub enum RedisParseErr {
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Incomplete,
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InvalidNumber(std::num::ParseIntError),
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InvalidLineStart(String),
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InvalidLineEnd,
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IncorrectRedisType,
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MissingField,
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}
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impl fmt::Display for RedisParseErr {
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fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
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use RedisParseErr::*;
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let msg = match self {
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Incomplete => "The input from Redis does not form a complete message, likely because \
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the input buffer filled partway through a message. Save this input \
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and try again with additional input from Redis."
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.to_string(),
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InvalidNumber(parse_int_err) => format!(
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"Redis indicated that an item would be a number, but it could not be parsed: {}",
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parse_int_err
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),
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InvalidLineStart(line_start_char) => format!(
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"A line from Redis started with `{}`, which is not a valid character to indicate \
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the type of the Redis line.",
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line_start_char
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),
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InvalidLineEnd => "A Redis line ended before expected line length".to_string(),
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IncorrectRedisType => "Received a Redis type that is not supported in this context. \
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Flodgatt expects each message from Redis to be a Redis array \
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consisting of bulk strings or integers."
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.to_string(),
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MissingField => "Redis input was missing a field Flodgatt expected (e.g., a `message` \
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without a payload line)"
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.to_string(),
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};
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write!(f, "{}", msg)
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}
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}
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impl Error for RedisParseErr {}
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impl From<std::num::ParseIntError> for RedisParseErr {
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fn from(error: std::num::ParseIntError) -> Self {
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Self::InvalidNumber(error)
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}
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}
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