From e5fd213d6b2e906e2b8db90fd21fce1c615b74a2 Mon Sep 17 00:00:00 2001
From: cxtom <chxtom2015@163.com>
Date: Wed, 10 Jul 2019 13:40:49 +0800
Subject: [PATCH] feat: support error property

---
 src/features/error.ts       | 40 +++++++++++++++++++++++++++++++++++++
 src/features/index.ts       |  4 +++-
 test/features/exception.php |  2 +-
 test/features/exception.ts  |  2 +-
 4 files changed, 45 insertions(+), 3 deletions(-)
 create mode 100644 src/features/error.ts

diff --git a/src/features/error.ts b/src/features/error.ts
new file mode 100644
index 0000000..80c885b
--- /dev/null
+++ b/src/features/error.ts
@@ -0,0 +1,40 @@
+/**
+ * @file Exception
+ * @author cxtom(cxtom2008@gmail.com)
+ */
+
+import * as ts from 'typescript';
+
+const map = {
+    message: 'getMessage',
+    lineNumber: 'getLine',
+    file: 'getFile',
+    stack: 'getTraceAsString'
+};
+
+export default {
+
+    emit(hint, node, {helpers, typeChecker}) {
+
+        const {
+            getTextOfNode,
+            emitExpression,
+            writeBase
+        } = helpers;
+
+        if (
+            ts.isPropertyAccessExpression(node)
+            && ts.isIdentifier(node.name)
+            && map[getTextOfNode(node.name)]
+        ) {
+            const symbol = typeChecker.getSymbolAtLocation(node.expression);
+            const declaration = symbol.valueDeclaration;
+            if (declaration && ts.isCatchClause(declaration.parent)) {
+                emitExpression(node.expression);
+                return writeBase(`->${map[getTextOfNode(node.name)]}()`);
+            }
+        }
+
+        return false;
+    }
+};
diff --git a/src/features/index.ts b/src/features/index.ts
index faac13a..acbba11 100644
--- a/src/features/index.ts
+++ b/src/features/index.ts
@@ -12,6 +12,7 @@ import NumberPlugin from './number';
 import ArrayPlugin from './array';
 import ConsolePlugin from './console';
 import DatePlugin from './date';
+import ErrorPlugin from './error';
 
 export default [
     StringPligin,
@@ -22,5 +23,6 @@ export default [
     NumberPlugin,
     ArrayPlugin,
     ConsolePlugin,
-    DatePlugin
+    DatePlugin,
+    ErrorPlugin
 ];
diff --git a/test/features/exception.php b/test/features/exception.php
index e7e59f9..aee82cf 100644
--- a/test/features/exception.php
+++ b/test/features/exception.php
@@ -4,7 +4,7 @@
     throw new \Exception("error!");
 }
 catch (\Exception $e) {
-    echo "error";
+    echo "error" . $e->getMessage();
 }
 $a = "hard";
 throw new \Exception("a " . $a . " error!");
diff --git a/test/features/exception.ts b/test/features/exception.ts
index 69f0dda..9bfe9ee 100644
--- a/test/features/exception.ts
+++ b/test/features/exception.ts
@@ -3,7 +3,7 @@ try {
     throw 'error!';
 }
 catch (e) {
-    console.log('error');
+    console.log('error' + e.message);
 }
 
 const a = 'hard';