use reifydb_codec::frame::{encode::encode_frames, options::EncodeOptions};
use reifydb_value::{
reifydb_assertions,
value::{diff_type::DiffType, frame::frame::Frame, system_columns::SystemColumn},
};
use serde_json::{self, Map, Value as JsonValue, to_string as json_to_string};
pub const CONTENT_TYPE_JSON: &str = "application/vnd.reifydb.json";
pub const CONTENT_TYPE_FRAMES: &str = "application/vnd.reifydb.frames";
pub const CONTENT_TYPE_RBCF: &str = "application/vnd.reifydb.rbcf";
pub const CONTENT_TYPE_PROTO: &str = "application/vnd.reifydb.proto";
pub fn encode_frames_rbcf(frames: &[Frame]) -> Result<Vec<u8>, String> {
encode_frames(frames, &EncodeOptions::fast()).map_err(|e| e.to_string())
}
pub struct ResolvedResponse {
pub content_type: String,
pub body: String,
}
pub fn resolve_change_json(frames: Vec<Frame>) -> Result<ResolvedResponse, String> {
let envelopes: Vec<JsonValue> = frames.iter().map(change_envelope).collect();
Ok(json_response(json_to_string(&envelopes).map_err(|e| e.to_string())?))
}
fn change_envelope(frame: &Frame) -> JsonValue {
let row_count = frame.columns.first().map(|c| c.data.len()).unwrap_or(0);
let row_numbers = frame.row_numbers();
let rows: Vec<JsonValue> = (0..row_count)
.map(|i| {
let mut obj = Map::new();
if let Some(rn) = row_numbers.get(i) {
obj.insert(SystemColumn::RowNumbers.name().to_string(), JsonValue::from(rn.value()));
}
for col in frame.iter() {
obj.insert(col.name.clone(), col.data.get_value(i).to_json_value());
}
JsonValue::Object(obj)
})
.collect();
let mut envelope = Map::new();
if let Some(op) = frame.op {
envelope.insert("op".to_string(), JsonValue::from(DiffType::as_u8(op)));
}
envelope.insert("rows".to_string(), JsonValue::Array(rows));
JsonValue::Object(envelope)
}
pub fn resolve_response_json(frames: Vec<Frame>, unwrap: bool) -> Result<ResolvedResponse, String> {
if frames.is_empty() {
return Ok(json_response("[]".to_string()));
}
if has_body_column(&frames) {
let frame = frames.into_iter().next().unwrap();
return Ok(json_response(render_body_column(frame, unwrap)));
}
Ok(json_response(render_frame_rows(&frames, unwrap)))
}
#[inline]
fn json_response(body: String) -> ResolvedResponse {
ResolvedResponse {
content_type: CONTENT_TYPE_JSON.to_string(),
body,
}
}
#[inline]
fn has_body_column(frames: &[Frame]) -> bool {
frames.first().map(|f| f.columns.iter().any(|c| c.name == "body")).unwrap_or(false)
}
#[inline]
fn render_body_column(frame: Frame, unwrap: bool) -> String {
let body_col_idx = frame.columns.iter().position(|c| c.name == "body").unwrap();
let body_col = &frame.columns[body_col_idx];
let row_count = body_col.data.len();
if body_col.data.is_utf8() {
let values: Vec<String> = (0..row_count).map(|i| body_col.data.as_string(i)).collect();
if unwrap || values.len() == 1 {
values.into_iter().next().unwrap()
} else {
format!("[{}]", values.join(", "))
}
} else {
let json_values: Vec<JsonValue> =
(0..row_count).map(|i| body_col.data.get_value(i).to_json_value()).collect();
reifydb_assertions! {
let len = json_values.len();
assert!(
len > 0,
"render_body_column reached the non-utf8 branch with an empty body column, but the \
caller already established the frame is non-empty by detecting a body column on it; \
indexing json_values[0] would panic on a row_count={len} column"
);
}
if unwrap {
json_to_string(&json_values[0]).unwrap()
} else {
json_to_string(&json_values).unwrap()
}
}
}
#[inline]
fn render_frame_rows(frames: &[Frame], unwrap: bool) -> String {
let json_frames = frames_to_json_rows(frames);
if unwrap && json_frames.len() == 1 && json_frames[0].len() == 1 {
json_to_string(&json_frames[0][0]).unwrap()
} else {
json_to_string(&json_frames).unwrap()
}
}
fn frames_to_json_rows(frames: &[Frame]) -> Vec<Vec<JsonValue>> {
frames.iter()
.map(|frame| {
let row_count = frame.columns.first().map(|c| c.data.len()).unwrap_or(0);
(0..row_count)
.map(|i| {
let mut obj = Map::new();
for col in frame.iter() {
obj.insert(col.name.clone(), col.data.get_value(i).to_json_value());
}
JsonValue::Object(obj)
})
.collect()
})
.collect()
}