mautrix-whatsapp/database/upgrades/2019-08-25-move-state-store-to-db.go

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package upgrades
import (
"database/sql"
"encoding/json"
"fmt"
"io/ioutil"
"os"
"strings"
"maunium.net/go/mautrix"
"maunium.net/go/mautrix-appservice"
)
func init() {
migrateRegistrations := func(tx *sql.Tx, registrations map[string]bool) error {
if len(registrations) == 0 {
return nil
}
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executeBatch := func(tx *sql.Tx, valueStrings []string, values ...interface{}) error {
valueString := strings.Join(valueStrings, ",")
_, err := tx.Exec("INSERT INTO mx_registrations (user_id) VALUES "+valueString, values...)
return err
}
batchSize := 100
values := make([]interface{}, 0, batchSize)
valueStrings := make([]string, 0, batchSize)
i := 1
for userID, registered := range registrations {
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if i == batchSize {
err := executeBatch(tx, valueStrings, values...)
if err != nil {
return err
}
i = 1
values = make([]interface{}, 0, batchSize)
valueStrings = make([]string, 0, batchSize)
}
if registered {
values = append(values, userID)
valueStrings = append(valueStrings, fmt.Sprintf("($%d)", i))
i++
}
}
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return executeBatch(tx, valueStrings, values...)
}
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migrateMemberships := func(tx *sql.Tx, rooms map[string]map[string]mautrix.Member) error {
for roomID, members := range rooms {
if len(members) == 0 {
continue
}
var values []interface{}
var valueStrings []string
i := 1
for userID, membership := range members {
values = append(values, roomID, userID, membership)
valueStrings = append(valueStrings, fmt.Sprintf("($%d, $%d, $%d)", i, i+1, i+2))
i += 3
}
valueString := strings.Join(valueStrings, ",")
_, err := tx.Exec("INSERT INTO mx_user_profile (room_id, user_id, membership) VALUES "+valueString, values...)
if err != nil {
return err
}
}
return nil
}
migratePowerLevels := func(tx *sql.Tx, rooms map[string]*mautrix.PowerLevels) error {
if len(rooms) == 0 {
return nil
}
var values []interface{}
var valueStrings []string
i := 1
for roomID, powerLevels := range rooms {
powerLevelBytes, err := json.Marshal(powerLevels)
if err != nil {
return err
}
values = append(values, roomID, powerLevelBytes)
valueStrings = append(valueStrings, fmt.Sprintf("($%d, $%d)", i, i+1))
i += 2
}
valueString := strings.Join(valueStrings, ",")
_, err := tx.Exec("INSERT INTO mx_room_state (room_id, power_levels) VALUES "+valueString, values...)
return err
}
userProfileTable := `CREATE TABLE mx_user_profile (
room_id VARCHAR(255),
user_id VARCHAR(255),
membership VARCHAR(15) NOT NULL,
PRIMARY KEY (room_id, user_id)
)`
roomStateTable := `CREATE TABLE mx_room_state (
room_id VARCHAR(255) PRIMARY KEY,
power_levels TEXT
)`
registrationsTable := `CREATE TABLE mx_registrations (
user_id VARCHAR(255) PRIMARY KEY
)`
upgrades[9] = upgrade{"Move state store to main DB", func(tx *sql.Tx, ctx context) error {
store := appservice.NewBasicStateStore().(*appservice.BasicStateStore)
if ctx.dialect == Postgres {
roomStateTable = strings.Replace(roomStateTable, "TEXT", "JSONB", 1)
}
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if _, err := tx.Exec(userProfileTable); err != nil {
return err
} else if _, err = tx.Exec(roomStateTable); err != nil {
return err
} else if _, err = tx.Exec(registrationsTable); err != nil {
return err
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} else if data, err := ioutil.ReadFile("mx-state.json"); err != nil {
ctx.log.Debugln("mx-state.json not found, not migrating state store")
} else if err = json.Unmarshal(data, &store); err != nil {
return err
} else if err = migrateRegistrations(tx, store.Registrations); err != nil {
return err
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} else if err = migrateMemberships(tx, store.Members); err != nil {
return err
} else if err = migratePowerLevels(tx, store.PowerLevels); err != nil {
return err
} else if err = os.Rename("mx-state.json", "mx-state.json.bak"); err != nil {
return err
}
return nil
}}
}