feat(ReverseEngine)：初始化工程

support/FileContentSupport.go

@@ -0,0 +1,101 @@
+package support
+
+import (
+	"ReverseEngine/entity"
+	"ReverseEngine/static"
+	"strings"
+)
+
+type FileContentSupport struct{}
+
+func (FileContentSupport) GenerateFileContent(filePath string, fileName string, fms []entity.FieldMessage, hasTime bool, tagKey string) string {
+	var build strings.Builder
+	pName := splitLast(filePath, static.Splice)
+
+	writePackage(&build, pName)        //写文件的引用包
+	writeImportIfTime(&build, hasTime) //如果有time.Time类型的需要写入import
+	buildStructHead(&build, fileName)  //写入结构体头
+
+	//对于没有字段的返回空定义的文件
+	if len(fms) == 0 {
+		build.WriteString(static.RightBrace)
+		return build.String()
+	}
+
+	//写中间字段的操作
+	for _, fm := range fms {
+		build.WriteString("	")
+		build.WriteString(fm.FiledName)
+		build.WriteString(" ")
+		build.WriteString(fm.FieldType)
+		build.WriteString(" ")
+		build.WriteString(generateTag(fm, tagKey))
+		build.WriteString(" ")
+		build.WriteString(static.DoubleInclinedRod)
+		build.WriteString(fm.Comment)
+		build.WriteString(static.LineFeed)
+	}
+
+	build.WriteString(static.RightBrace)
+
+	return build.String()
+}
+
+func generateTag(message entity.FieldMessage, tagKey string) string {
+	var build strings.Builder
+	build.WriteString("`")
+	build.WriteString(tagKey)
+	build.WriteString(static.Colon)
+	generateTagValue(message, &build)
+	build.WriteString("`")
+	return build.String()
+}
+
+func generateTagValue(message entity.FieldMessage, builder *strings.Builder) {
+	builder.WriteString("\"")
+	if message.IsKey {
+		builder.WriteString("pk ")
+	}
+	if !message.CanNull {
+		builder.WriteString("not null ")
+	}
+
+	builder.WriteString(message.OriginType)
+	builder.WriteString("\"")
+}
+
+func buildStructHead(build *strings.Builder, fileName string) {
+	build.WriteString("type ")
+	build.WriteString(fileName)
+	build.WriteString(" struct")
+	build.WriteString(static.LeftBrace)
+	build.WriteString(static.LineFeed)
+}
+
+func writeImportIfTime(build *strings.Builder, hasTime bool) {
+	//如果有类型匹配上时间，那么需要在头部加上import
+	if hasTime {
+		build.WriteString("import (")
+		build.WriteString("\n	")
+		build.WriteString("\"time\"")
+		build.WriteString("\n")
+		build.WriteString(")")
+		build.WriteString(static.LineFeed)
+		build.WriteString(static.LineFeed)
+	}
+}
+
+func writePackage(build *strings.Builder, pName string) {
+	build.WriteString("package ")
+	build.WriteString(pName)
+	build.WriteString(static.LineFeed)
+	build.WriteString(static.LineFeed)
+}
+
+/*
+	返回按照规则切割的最后一个字符串
+*/
+func splitLast(filePath string, split string) string {
+	ss := strings.Split(filePath, split)
+	return ss[len(ss)-1]
+}