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chore(lading_payload): Make TemplatedJson::generate_line public #1829

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chore(lading_payload): Make TemplatedJson::generate_line public #1829

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13 changes: 7 additions & 6 deletions lading_payload/src/templated_json.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -89,11 +89,12 @@ impl TemplatedJson {
/// # Errors
///
/// Returns an error if the underlying generator fails.
fn generate_line(&mut self, rng: &mut impl Rng) -> Result<(), Error> {
pub fn generate_line(&mut self, rng: &mut impl Rng) -> Result<&str, Error> {
self.ctx.fill(None);
self.line_buf.clear();
self.generator
.generate(rng, &mut self.ctx, &self.definitions, &mut self.line_buf)
.generate(rng, &mut self.ctx, &self.definitions, &mut self.line_buf)?;
Ok(self.line_buf.as_str())
}
}

Expand All @@ -106,12 +107,12 @@ impl crate::Serialize for TemplatedJson {
let mut bytes_remaining = max_bytes;
loop {
self.generate_line(&mut rng)?;
let line_length = self.line_buf.as_str().len() + 1; // +1 for the trailing newline
let Some(remainder) = bytes_remaining.checked_sub(line_length) else {
self.line_buf.push_char('\n');
let line = self.line_buf.as_str();
let Some(remainder) = bytes_remaining.checked_sub(line.len()) else {
break;
};
self.line_buf.push_char('\n');
writer.write_all(self.line_buf.as_str().as_bytes())?;
writer.write_all(line.as_bytes())?;
bytes_remaining = remainder;
}
Ok(())
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