feat: foreignKeys check

+fix: "unnamed" field bug

foreignKeyCheck/foreignKeyCheck.go

@@ -1 +1,49 @@
 package foreignKeyCheck
+
+import (
+	"golang.org/x/tools/go/analysis"
+	"gormlint/common"
+	"strings"
+)
+
+// ForeignKeyCheck todo: add URL for foreign key analyzer rules
+var ForeignKeyCheck = &analysis.Analyzer{
+	Name: "GormForeignKeyCheck",
+	Doc:  "Check foreign key in gorm model struct tag",
+	Run:  run,
+}
+
+var models map[string]common.Model
+
+func run(pass *analysis.Pass) (any, error) {
+	models = make(map[string]common.Model)
+	common.ParseModels(pass, &models)
+
+	for _, model := range models {
+		for _, field := range model.Fields {
+			for _, param := range field.Params {
+				pair := strings.Split(param, ":")
+				paramName := pair[0]
+				paramValue := pair[1]
+				if paramName == "foreignKey" {
+					foreignKey, fieldExist := model.Fields[paramValue]
+
+					if !fieldExist {
+						pass.Reportf(field.Pos, "Foreign key \"%s\" mentioned in tag at field \"%s\" doesn't exist in model \"%s\"", paramValue, field.Name, model.Name)
+					} else {
+						foreignKeyType := common.ResolveBaseType(foreignKey.Type)
+						if foreignKeyType == nil {
+							pass.Reportf(foreignKey.Pos, "Failed to resolve type of foreign key field \"%s\": %s", field.Name, foreignKey.Type)
+						} else {
+							// TODO: handle all int types
+							if *foreignKeyType != "uint" && *foreignKeyType != "int" {
+								pass.Reportf(foreignKey.Pos, "Foreign key should have type like int, not \"%s\"", foreignKey.Type)
+							}
+						}
+					}
+				}
+			}
+		}
+	}
+	return nil, nil
+}