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use owo_colors::Style;
use protobuf::reflect::*;
use protobuf::MessageDyn;
use protobuf::UnknownValueRef;
use std::fmt;
use std::fmt::Display;
use std::fmt::Write;
use owo_colors::OwoColorize;
use protobuf_support::text_format::quote_bytes_to;
pub fn print_to_string_fancy(m: &dyn MessageDyn) -> String {
let mut r = String::new();
print_to_internal(&MessageRef::from(m), &mut r, true, 0);
r.to_string()
}
fn print_str_to(s: &str, buf: &mut String) {
// TODO: keep printable Unicode
quote_bytes_to(s.as_bytes(), buf);
}
fn do_indent(buf: &mut String, pretty: bool, indent: usize) {
if pretty && indent > 0 {
for _ in 0..indent {
buf.push_str(" ");
}
}
}
trait FieldName: fmt::Display {}
impl<'a> FieldName for &'a str {}
impl FieldName for u32 {}
fn print_start_field<F: FieldName>(
buf: &mut String,
pretty: bool,
indent: usize,
first: &mut bool,
field_name: F,
) {
if !*first && !pretty {
buf.push_str(" ");
}
do_indent(buf, pretty, indent);
*first = false;
if indent == 0 {
write!(buf, "{}", field_name.bold().bright_red()).unwrap();
} else {
write!(buf, "{}", field_name.bright_blue()).unwrap();
}
}
fn print_end_field(buf: &mut String, pretty: bool) {
if pretty {
buf.push_str("\n");
}
}
struct Prefix (Style);
struct Suffix (Style);
impl Display for Prefix {
fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
self.0.fmt_prefix(fmt)
}
}
impl Display for Suffix {
fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
self.0.fmt_suffix(fmt)
}
}
fn print_field<F: FieldName>(
buf: &mut String,
pretty: bool,
indent: usize,
first: &mut bool,
field_name: F,
value: ReflectValueRef,
) {
print_start_field(buf, pretty, indent, first, field_name);
match value {
ReflectValueRef::Message(m) => {
buf.push_str(" {");
if pretty {
buf.push_str("\n");
}
print_to_internal(&m, buf, pretty, indent + 1);
do_indent(buf, pretty, indent);
buf.push_str("}");
}
ReflectValueRef::Enum(d, v) => {
buf.push_str(": ");
match d.value_by_number(v) {
Some(e) => write!(buf, "{}", e.name().bright_yellow()).unwrap(),
None => write!(buf, ": {}", v.bright_red()).unwrap(),
}
}
ReflectValueRef::String(s) => {
let style = Style::new().bright_cyan();
buf.push_str(": ");
write!(buf, "{}", Prefix(style)).unwrap();
print_str_to(s, buf);
write!(buf, "{}", Suffix(style)).unwrap();
}
ReflectValueRef::Bytes(b) => {
buf.push_str(": ");
quote_bytes_to(b, buf);
}
ReflectValueRef::I32(v) => {
write!(buf, ": {}", v.bright_yellow()).unwrap();
}
ReflectValueRef::I64(v) => {
write!(buf, ": {}", v.bright_yellow()).unwrap();
}
ReflectValueRef::U32(v) => {
write!(buf, ": {}", v.bright_yellow()).unwrap();
}
ReflectValueRef::U64(v) => {
write!(buf, ": {}", v.bright_yellow()).unwrap();
}
ReflectValueRef::Bool(v) => {
write!(buf, ": {}", v.bright_yellow()).unwrap();
}
ReflectValueRef::F32(v) => {
write!(buf, ": {}", v.bright_yellow()).unwrap();
}
ReflectValueRef::F64(v) => {
write!(buf, ": {}", v.bright_yellow()).unwrap();
}
}
print_end_field(buf, pretty);
}
pub fn print_to_internal(m: &MessageRef, buf: &mut String, pretty: bool, indent: usize) {
let d = m.descriptor_dyn();
let mut first = true;
for f in d.fields() {
match f.get_reflect(&**m) {
ReflectFieldRef::Map(map) => {
for (k, v) in &map {
print_start_field(buf, pretty, indent, &mut first, f.name());
buf.push_str(" {");
if pretty {
buf.push_str("\n");
}
let mut entry_first = true;
print_field(buf, pretty, indent + 1, &mut entry_first, "key", k);
print_field(buf, pretty, indent + 1, &mut entry_first, "value", v);
do_indent(buf, pretty, indent);
buf.push_str("}");
print_end_field(buf, pretty);
}
}
ReflectFieldRef::Repeated(repeated) => {
for v in repeated {
print_field(buf, pretty, indent, &mut first, f.name(), v);
}
}
ReflectFieldRef::Optional(optional) => {
if let Some(v) = optional.value() {
print_field(buf, pretty, indent, &mut first, f.name(), v);
}
}
}
}
let mut fields: Vec<(u32, UnknownValueRef)> = m.unknown_fields_dyn().iter().collect();
// Sort for stable output
fields.sort_by_key(|(field_number, _)| *field_number);
for (field_number, value) in fields {
// TODO: try decode nested message for length-delimited
print_field(
buf,
pretty,
indent,
&mut first,
field_number,
to_reflect_value_ref(&value),
);
}
}
fn to_reflect_value_ref<'o>(r: &'o UnknownValueRef<'o>) -> ReflectValueRef<'o> {
match r {
UnknownValueRef::Fixed32(v) => ReflectValueRef::U32(*v),
UnknownValueRef::Fixed64(v) => ReflectValueRef::U64(*v),
UnknownValueRef::Varint(v) => ReflectValueRef::U64(*v),
UnknownValueRef::LengthDelimited(v) => ReflectValueRef::Bytes(v),
}
}
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