init: initial commit

internal/parser/cad_parser.go

@@ -0,0 +1,33 @@
+package parser
+
+import (
+	"fmt"
+	"strings"
+)
+
+// CADParser is a stub parser for CAD/DWG files.
+// Real implementation requires CGO/GDAL — reserved for future development.
+type CADParser struct{}
+
+func (p *CADParser) SupportedExtensions() []string {
+	return []string{".dwg", ".dxf"}
+}
+
+func (p *CADParser) ParseToMarkdown(path string) (string, error) {
+	// Stub: simulate extracting layer names and annotations
+	var sb strings.Builder
+	sb.WriteString("## CAD 图纸解析结果 (模拟)\n\n")
+	sb.WriteString(fmt.Sprintf("**文件**: %s\n\n", path))
+	sb.WriteString("### 图层列表\n\n")
+	sb.WriteString("| 图层名 | 类型 | 元素数 |\n")
+	sb.WriteString("| --- | --- | --- |\n")
+	sb.WriteString("| STR_MAIN | 结构主体 | 142 |\n")
+	sb.WriteString("| DIM_TEXT | 标注文字 | 87 |\n")
+	sb.WriteString("| SEAL_V3 | 密封层 | 23 |\n\n")
+	sb.WriteString("### 标注摘要\n\n")
+	sb.WriteString("- 预留缝宽度: 2.5mm\n")
+	sb.WriteString("- 坐标基点: X=1240, Y=442\n")
+	sb.WriteString("\n> ⚠️ 本解析为模拟结果，完整 CAD 解析需集成 GDAL/LibreDWG。\n")
+
+	return sb.String(), nil
+}