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use bufio;
use dejson;
use encoding::json;
use errors;
use fs;
use io;
use os;
use path;
use strings;
use trace;
def MISSINGNO = "minecraft:missingno";
def BUILTIN_MISSING = "minecraft:builtin/missing";
type Pack = struct {
fs: *fs::fs,
kind: str,
};
fn resource_splitpath(path: str) (str, str, str, str, str) = {
const (base, path) = strings::cut(path, "/");
const (ns, path) = strings::cut(path, "/");
const (kind, path) = strings::cut(path, "/");
const bnameindex = match (strings::rindex(path, '/')) {
case let index: size =>
yield index + 1;
case void =>
yield 0z;
};
const extindex = match (strings::rindex(
strings::sub(path, bnameindex, strings::end), '.')) {
case let index: size =>
yield bnameindex + index;
case void =>
yield len(path);
};
const name = strings::sub(path, 0, extindex);
const ext = strings::sub(path, extindex, strings::end);
return (base, ns, kind, name, ext);
};
fn resource_open(
pack: *Pack,
kind: str,
ident: str,
ext: str,
tr: *trace::tracer,
) (io::handle | trace::failed) = {
const (ns, name) = ident_split(ident);
const fname = strings::concat(name, ext);
defer free(fname);
let path = path::init()!;
if (path::set(&path, pack.kind, ns, kind, fname) is path::too_long) {
return trace::error(tr, "Path too long");
};
const path = path::string(&path);
match (fs::open(pack.fs, path, fs::flag::RDONLY)) {
case let f: io::handle =>
return f;
case let err: fs::error =>
return trace::error(tr, "open: {}", fs::strerror(err));
};
};
fn resource_load_json(
pack: *Pack,
kind: str,
ident: str,
ext: str,
tr: *trace::tracer,
) (json::value | trace::failed) = {
const f = resource_open(pack, kind, ident, ext, tr)?;
let rbuf: [os::BUFSZ]u8 = [0...];
let buf = bufio::init(f, rbuf, []);
const json = match (json::load(&buf)) {
case let json: json::value =>
yield json;
case let err: json::error =>
io::close(f): void;
return trace::error(tr, "Invalid JSON: {}",
json::strerror(err));
};
match (io::close(f)) {
case void => void;
case let err: io::error =>
json::finish(json);
return trace::error(tr, "close: {}", io::strerror(err));
};
return json;
};
fn resource_search(
pack: *Pack,
kind: str,
exts: str...
) [](str, str) = {
const tr = trace::ctx(&trace::root, "resource search");
let out: [](str, str) = [];
let path = path::init()!;
const it = match (fs::iter(pack.fs, pack.kind)) {
case let x: *fs::iterator =>
yield x;
case let err: fs::error =>
trace::error(&tr, "{}: fs::iter: {}",
pack.kind, fs::strerror(err)): void;
return out;
};
defer fs::finish(it);
for (true) match (fs::next(it)) {
case let ent: fs::dirent =>
if (!fs::isdir(ent.ftype)) continue;
if (strings::hasprefix(ent.name, ".")) continue;
if (path::set(&path, pack.kind, ent.name, kind)
is path::too_long) {
trace::error(&tr, "{}/{}/{}: Path too long",
pack.kind, ent.name, kind): void;
continue;
};
resource_search_ns(pack, &out, path::string(&path), &tr, exts...);
case done => break;
};
return out;
};
fn resource_search_ns(
pack: *Pack,
out: *[](str, str),
parent: str,
tr: *trace::tracer,
exts: str...
) void = {
let path = path::init()!;
const it = match (fs::iter(pack.fs, parent)) {
case let x: *fs::iterator =>
yield x;
case errors::noentry =>
return;
case let err: fs::error =>
trace::error(tr, "{}: fs::iter: {}",
parent, fs::strerror(err)): void;
return;
};
defer fs::finish(it);
for (true) match (fs::next(it)) {
case let ent: fs::dirent =>
if (strings::hasprefix(ent.name, ".")) continue;
if (path::set(&path, parent, ent.name) is path::too_long) {
trace::error(tr, "{}/{}: Path too long",
parent, ent.name): void;
continue;
};
const path = path::string(&path);
if (fs::isdir(ent.ftype)) {
resource_search_ns(pack, out, path, tr, exts...);
} else if (fs::isfile(ent.ftype)) {
const (_, ns, _, name, ext) =
resource_splitpath(path);
for (let i = 0z; i < len(exts); i += 1) {
if (ext == exts[i]) {
const ident = ident_make(ns, name);
// yes, this borrow from input is
// intentional. needs to be documented
// later.
append(out, (ident, exts[i]));
break;
};
};
};
case done => break;
};
};
fn wassert_fields(de: *dejson::deser, names: str...) (void | dejson::error) = {
dejson::object(de)?;
match (dejson::assert_fields(de, names...)) {
case let err: dejson::error =>
defer free(err);
trace::warn(&trace::root, "{}", err);
case void => void;
};
};
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