mirror of
https://github.com/meilisearch/meilisearch.git
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102 lines
3.1 KiB
Rust
102 lines
3.1 KiB
Rust
use std::fmt;
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use std::io::{self, BufRead, BufReader, BufWriter, Cursor, Read, Seek, Write};
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use meilisearch_error::{Code, ErrorCode};
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use milli::documents::DocumentBatchBuilder;
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type Result<T> = std::result::Result<T, DocumentFormatError>;
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#[derive(Debug)]
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pub enum PayloadType {
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Ndjson,
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Json,
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Csv,
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}
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impl fmt::Display for PayloadType {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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match self {
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PayloadType::Ndjson => write!(f, "ndjson"),
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PayloadType::Json => write!(f, "json"),
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PayloadType::Csv => write!(f, "csv"),
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}
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}
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}
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#[derive(thiserror::Error, Debug)]
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pub enum DocumentFormatError {
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#[error("Internal error!: {0}")]
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Internal(Box<dyn std::error::Error + Send + Sync + 'static>),
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#[error("The `{1}` payload provided is malformed. `{0}`.")]
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MalformedPayload(
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Box<dyn std::error::Error + Send + Sync + 'static>,
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PayloadType,
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),
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}
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impl From<(PayloadType, milli::documents::Error)> for DocumentFormatError {
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fn from((ty, error): (PayloadType, milli::documents::Error)) -> Self {
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match error {
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milli::documents::Error::Io(e) => Self::Internal(Box::new(e)),
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e => Self::MalformedPayload(Box::new(e), ty),
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}
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}
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}
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impl ErrorCode for DocumentFormatError {
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fn error_code(&self) -> Code {
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match self {
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DocumentFormatError::Internal(_) => Code::Internal,
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DocumentFormatError::MalformedPayload(_, _) => Code::MalformedPayload,
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}
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}
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}
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internal_error!(DocumentFormatError: io::Error);
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/// reads csv from input and write an obkv batch to writer.
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pub fn read_csv(input: impl Read, writer: impl Write + Seek) -> Result<usize> {
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let writer = BufWriter::new(writer);
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let builder =
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DocumentBatchBuilder::from_csv(input, writer).map_err(|e| (PayloadType::Csv, e))?;
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let document_count = builder.len();
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builder.finish().map_err(|e| (PayloadType::Csv, e))?;
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Ok(document_count)
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}
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/// reads jsonl from input and write an obkv batch to writer.
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pub fn read_ndjson(input: impl Read, writer: impl Write + Seek) -> Result<usize> {
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let mut reader = BufReader::new(input);
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let writer = BufWriter::new(writer);
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let mut builder = DocumentBatchBuilder::new(writer).map_err(|e| (PayloadType::Ndjson, e))?;
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let mut buf = String::new();
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while reader.read_line(&mut buf)? > 0 {
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builder
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.extend_from_json(Cursor::new(&buf.as_bytes()))
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.map_err(|e| (PayloadType::Ndjson, e))?;
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buf.clear();
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}
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let document_count = builder.len();
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builder.finish().map_err(|e| (PayloadType::Ndjson, e))?;
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Ok(document_count)
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}
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/// reads json from input and write an obkv batch to writer.
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pub fn read_json(input: impl Read, writer: impl Write + Seek) -> Result<usize> {
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let writer = BufWriter::new(writer);
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let mut builder = DocumentBatchBuilder::new(writer).map_err(|e| (PayloadType::Json, e))?;
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builder
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.extend_from_json(input)
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.map_err(|e| (PayloadType::Json, e))?;
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let document_count = builder.len();
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builder.finish().map_err(|e| (PayloadType::Json, e))?;
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Ok(document_count)
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}
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