gitech

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// Copyright 2022 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package migration
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import (
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	"fmt"
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	"os"
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	"strings"
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	"time"
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	"code.gitea.io/gitea/modules/json"
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	"code.gitea.io/gitea/modules/log"
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	"github.com/santhosh-tekuri/jsonschema/v5"
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	"gopkg.in/yaml.v3"
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)
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// Load project data from file, with optional validation
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func Load(filename string, data any, validation bool) error {
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	isJSON := strings.HasSuffix(filename, ".json")
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	bs, err := os.ReadFile(filename)
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	if err != nil {
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		return err
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	}
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	if validation {
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		err := validate(bs, data, isJSON)
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		if err != nil {
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			return err
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		}
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	}
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	return unmarshal(bs, data, isJSON)
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}
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func unmarshal(bs []byte, data any, isJSON bool) error {
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	if isJSON {
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		return json.Unmarshal(bs, data)
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	}
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	return yaml.Unmarshal(bs, data)
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}
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func getSchema(filename string) (*jsonschema.Schema, error) {
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	c := jsonschema.NewCompiler()
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	c.LoadURL = openSchema
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	return c.Compile(filename)
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}
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func validate(bs []byte, datatype any, isJSON bool) error {
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	var v any
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	err := unmarshal(bs, &v, isJSON)
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	if err != nil {
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		return err
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	}
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	if !isJSON {
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		v, err = toStringKeys(v)
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		if err != nil {
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			return err
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		}
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	}
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	var schemaFilename string
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	switch datatype := datatype.(type) {
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	case *[]*Issue:
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		schemaFilename = "issue.json"
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	case *[]*Milestone:
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		schemaFilename = "milestone.json"
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	default:
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		return fmt.Errorf("file_format:validate: %T has not a validation implemented", datatype)
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	}
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	sch, err := getSchema(schemaFilename)
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	if err != nil {
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		return err
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	}
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	err = sch.Validate(v)
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	if err != nil {
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		log.Error("migration validation with %s failed:\n%#v", schemaFilename, err)
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	}
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	return err
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}
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func toStringKeys(val any) (any, error) {
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	var err error
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	switch val := val.(type) {
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	case map[string]any:
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		m := make(map[string]any)
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		for k, v := range val {
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			m[k], err = toStringKeys(v)
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			if err != nil {
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				return nil, err
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			}
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		}
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		return m, nil
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	case []any:
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		l := make([]any, len(val))
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		for i, v := range val {
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			l[i], err = toStringKeys(v)
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			if err != nil {
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				return nil, err
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			}
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		}
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		return l, nil
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	case time.Time:
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		return val.Format(time.RFC3339), nil
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	default:
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		return val, nil
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	}
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}
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