From e521b075f6a7dacc1b90c0105df05c689aa793a4 Mon Sep 17 00:00:00 2001
From: nsfisis <nsfisis@gmail.com>
Date: Fri, 15 May 2026 01:19:56 +0900
Subject: feat(port): port ErrorHandler.php

---
 crates/shirabe/src/util/error_handler.rs | 118 +++++++++++++++++++++++++++++++
 1 file changed, 118 insertions(+)

(limited to 'crates/shirabe/src/util/error_handler.rs')

diff --git a/crates/shirabe/src/util/error_handler.rs b/crates/shirabe/src/util/error_handler.rs
index d853270..2f8c699 100644
--- a/crates/shirabe/src/util/error_handler.rs
+++ b/crates/shirabe/src/util/error_handler.rs
@@ -1 +1,119 @@
 //! ref: composer/src/Composer/Util/ErrorHandler.php
+
+use std::sync::{Mutex, OnceLock};
+use shirabe_php_shim::{
+    debug_backtrace, error_reporting, filter_var, ini_get, is_resource,
+    set_error_handler, E_ALL, E_DEPRECATED, E_USER_DEPRECATED, E_WARNING, E_USER_WARNING,
+    FILTER_VALIDATE_BOOLEAN, PHP_EOL, STDERR, PhpMixed, ErrorException,
+};
+use crate::io::io_interface::IOInterface;
+
+static IO: OnceLock<Mutex<Option<Box<dyn IOInterface + Send>>>> = OnceLock::new();
+static HAS_SHOWN_DEPRECATION_NOTICE: Mutex<i64> = Mutex::new(0);
+
+fn io() -> &'static Mutex<Option<Box<dyn IOInterface + Send>>> {
+    IO.get_or_init(|| Mutex::new(None))
+}
+
+pub struct ErrorHandler;
+
+impl ErrorHandler {
+    pub fn handle(level: i64, message: String, file: String, line: i64) -> Result<bool, ErrorException> {
+        let is_deprecation_notice = level == E_DEPRECATED || level == E_USER_DEPRECATED;
+
+        // error code is not included in error_reporting
+        if !is_deprecation_notice && 0 == (error_reporting(None) & level) {
+            return Ok(true);
+        }
+
+        let mut message = message;
+
+        let xdebug_scream = ini_get("xdebug.scream").unwrap_or_default();
+        if filter_var(&xdebug_scream, FILTER_VALIDATE_BOOLEAN) {
+            message += "\n\nWarning: You have xdebug.scream enabled, the warning above may be\na legitimately suppressed error that you were not supposed to see.";
+        }
+
+        if !is_deprecation_notice {
+            // ignore some newly introduced warnings in new php versions until dependencies
+            // can be fixed as we do not want to abort execution for those
+            if (level == E_WARNING || level == E_USER_WARNING)
+                && message.contains("should either be used or intentionally ignored by casting it as (void)")
+            {
+                Self::output_warning(
+                    &format!("Ignored new PHP warning but it should be reported and fixed: {} in {}:{}", message, file, line),
+                    true,
+                );
+                return Ok(true);
+            }
+
+            return Err(ErrorException {
+                message,
+                code: 0,
+                severity: level,
+                filename: file,
+                lineno: line,
+            });
+        }
+
+        let io_guard = io().lock().unwrap();
+        if io_guard.is_some() {
+            let has_shown = *HAS_SHOWN_DEPRECATION_NOTICE.lock().unwrap();
+            if has_shown > 0 && !io_guard.as_ref().unwrap().is_verbose() {
+                if has_shown == 1 {
+                    io_guard.as_ref().unwrap().write_error("<warning>More deprecation notices were hidden, run again with `-v` to show them.</warning>");
+                    *HAS_SHOWN_DEPRECATION_NOTICE.lock().unwrap() = 2;
+                }
+                return Ok(true);
+            }
+            *HAS_SHOWN_DEPRECATION_NOTICE.lock().unwrap() = 1;
+            drop(io_guard);
+            Self::output_warning(&format!("Deprecation Notice: {} in {}:{}", message, file, line), false);
+        }
+
+        Ok(true)
+    }
+
+    pub fn register(io: Option<Box<dyn IOInterface + Send>>) {
+        set_error_handler(|level, message, file, line| {
+            Self::handle(level, message.to_string(), file.to_string(), line).unwrap_or(true)
+        });
+        error_reporting(Some(E_ALL));
+        *self::io().lock().unwrap() = io;
+    }
+
+    fn output_warning(message: &str, output_even_without_io: bool) {
+        let io_guard = io().lock().unwrap();
+        if let Some(ref io) = *io_guard {
+            io.write_error(&format!("<warning>{}</warning>", message));
+            if io.is_verbose() {
+                io.write_error("<warning>Stack trace:</warning>");
+                let frames: Vec<String> = debug_backtrace()
+                    .into_iter()
+                    .skip(2)
+                    .filter_map(|frame| {
+                        let line = frame.get("line").and_then(|v| v.as_int());
+                        let file = frame.get("file").and_then(|v| v.as_string()).map(|s| s.to_string());
+                        if let (Some(line), Some(file)) = (line, file) {
+                            Some(format!("<warning> {}:{}</warning>", file, line))
+                        } else {
+                            None
+                        }
+                    })
+                    .collect();
+                for frame_str in frames {
+                    io.write_error(&frame_str);
+                }
+            }
+            return;
+        }
+        drop(io_guard);
+
+        if output_even_without_io {
+            if is_resource(&PhpMixed::Int(STDERR)) {
+                shirabe_php_shim::fwrite(PhpMixed::Int(STDERR), &format!("Warning: {}{}", message, PHP_EOL), -1);
+            } else {
+                print!("Warning: {}{}", message, PHP_EOL);
+            }
+        }
+    }
+}
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