dbo/instance.go at master · Cyberpull/dbo · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
package dbo

import (
	"context"
	"errors"
	"fmt"
	"strings"

	"gorm.io/gorm"
)

type SeederEntry interface {
	Name() string
	Handler(db *gorm.DB) (err error)
}

type Instance interface {
	Get(options ...DB) (db *gorm.DB, err error)
	WithCancel(options ...DB) (db *gorm.DB, cancel context.CancelFunc, err error)

	Migrate(models ...any) (err error)
	Seed(entries ...SeederEntry) (err error)
}

type xInstance struct {
	opts Options
	db   *gorm.DB
}

func (x *xInstance) New() *gorm.DB {
	return NewSession(x.db)
}

func (x *xInstance) Get(options ...DB) (db *gorm.DB, err error) {
	opts := x.dbOptions(options...)

	if db = opts.DB; db == nil {
		db = x.New()
	}

	if db == nil {
		err = errors.New("Database connection not found")
		return
	}

	// Add Clauses
	if len(opts.Clauses) > 0 {
		db = db.Clauses(opts.Clauses...).Session(&gorm.Session{})
	}

	// Add Scopes
	if len(opts.Scopes) > 0 {
		db = db.Scopes(opts.Scopes...).Session(&gorm.Session{})
	}

	return
}

func (x *xInstance) WithCancel(options ...DB) (db *gorm.DB, cancel context.CancelFunc, err error) {
	opts := x.dbOptions(options...)

	db, err = x.Get(opts)

	if err != nil {
		return
	}

	ctx, cancel := opts.newContext()

	db = db.WithContext(ctx)

	return
}

func (x *xInstance) Migrate(models ...any) (err error) {
	fmt.Print("Running Database Migration... ")

	db, err := x.Get()

	if err != nil {
		return
	}

	switch x.opts.getDriver() {
	case DRIVER_MYSQL:
		db = db.Set("gorm:table_options", fmt.Sprintf(
			"ENGINE=%s CHARSET=%s COLLATE=%s",
			x.opts.getEngine(),
			x.opts.getCharset(),
			x.opts.getCollation(),
		))
	}

	err = db.AutoMigrate(models...)

	if err != nil {
		return
	}

	fmt.Println("Completed!")
	fmt.Println()

	return
}

func (x *xInstance) Seed(entries ...SeederEntry) (err error) {
	fmt.Println("Running Database Seeders...")

	db, err := x.Get()

	if err != nil {
		return
	}

	for _, entry := range entries {
		err = x.seed(NewSession(db), entry)

		if err != nil {
			return
		}
	}

	fmt.Println("Database Seeders Completed!")
	fmt.Println()

	return
}

func (x *xInstance) seed(db *gorm.DB, entry SeederEntry) (err error) {
	name := strings.TrimSpace(entry.Name())

	fmt.Printf("Seeding %v... ", name)

	err = entry.Handler(db)

	if err != nil {
		return
	}

	fmt.Println("Completed!")

	return
}

func (x *xInstance) dbOptions(options ...DB) DB {
	if len(options) > 0 {
		return options[0]
	}

	return DB{}
}