sqlstr 0.1.0

Sql string builder
Documentation 
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use alloc::string::String;
use core::fmt::{self, Display, Write};
use core::ops::Deref;

use crate::ArgumentBuffer;

#[derive(Debug, Clone, Default, PartialEq, Eq)]
pub struct TestArgs(String, u32);

impl TestArgs {
    pub const fn new() -> Self {
        Self(String::new(), 0)
    }

    pub fn as_str(&self) -> &str {
        &self.0
    }
}

impl Deref for TestArgs {
    type Target = str;

    fn deref(&self) -> &Self::Target {
        self.0.as_str()
    }
}

impl<T> ArgumentBuffer<T> for TestArgs
where
    T: Display,
{
    type Error = fmt::Error;

    fn push(&mut self, value: T) -> Result<(), Self::Error> {
        self.0.write_fmt(format_args!("{value};"))?;
        self.1 += 1;
        Ok(())
    }

    fn count(&self) -> u32 {
        self.1
    }
}

pub fn display_iter<'a, I, T>(iter: I) -> Result<String, fmt::Error>
where
    I: IntoIterator<Item = &'a T>,
    T: Display + ?Sized + 'a,
{
    let mut buffer = String::new();
    buffer.push('[');
    let mut iter = iter.into_iter();
    if let Some(item) = iter.next() {
        buffer.write_fmt(format_args!("{item}"))?;
    }
    for item in iter {
        buffer.write_fmt(format_args!(",{item}"))?;
    }
    buffer.push(']');
    Ok(buffer)
}

pub enum User {
    Id,
    Created,
    Name,
}

impl User {
    pub const TABLE: &str = "user";

    pub const fn as_str(&self) -> &'static str {
        match *self {
            Self::Id => "id",
            Self::Created => "created",
            Self::Name => "name",
        }
    }
}

impl Display for User {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        f.write_str(self.as_str())
    }
}