Mono repo -> Master (#22553)

Combines the following repositories into one:

https://github.com/mattermost/mattermost-server
https://github.com/mattermost/mattermost-webapp
https://github.com/mattermost/focalboard
https://github.com/mattermost/mattermost-plugin-playbooks

server/platform/shared/driver/conn.go

@@ -0,0 +1,117 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package driver
+
+import (
+	"context"
+	"database/sql/driver"
+
+	"github.com/mattermost/mattermost-server/v6/plugin"
+)
+
+// Conn is a DB driver conn implementation
+// which executes queries using the Plugin DB API.
+type Conn struct {
+	id  string
+	api plugin.Driver
+}
+
+// driverConn is a super-interface combining the basic
+// driver.Conn interface with some new additions later.
+type driverConn interface {
+	driver.Conn
+	driver.ConnBeginTx
+	driver.ConnPrepareContext
+	driver.ExecerContext
+	driver.QueryerContext
+	driver.Pinger
+}
+
+var (
+	// Compile-time check to ensure Conn implements the interface.
+	_ driverConn = &Conn{}
+)
+
+func (c *Conn) Begin() (tx driver.Tx, err error) {
+	txID, err := c.api.Tx(c.id, driver.TxOptions{})
+	if err != nil {
+		return nil, err
+	}
+
+	t := &wrapperTx{
+		id:  txID,
+		api: c.api,
+	}
+	return t, nil
+}
+
+func (c *Conn) BeginTx(_ context.Context, opts driver.TxOptions) (driver.Tx, error) {
+	txID, err := c.api.Tx(c.id, opts)
+	if err != nil {
+		return nil, err
+	}
+
+	t := &wrapperTx{
+		id:  txID,
+		api: c.api,
+	}
+	return t, nil
+}
+
+func (c *Conn) Prepare(q string) (driver.Stmt, error) {
+	stID, err := c.api.Stmt(c.id, q)
+	if err != nil {
+		return nil, err
+	}
+
+	st := &wrapperStmt{
+		id:  stID,
+		api: c.api,
+	}
+	return st, nil
+}
+
+func (c *Conn) PrepareContext(_ context.Context, q string) (driver.Stmt, error) {
+	stID, err := c.api.Stmt(c.id, q)
+	if err != nil {
+		return nil, err
+	}
+	st := &wrapperStmt{
+		id:  stID,
+		api: c.api,
+	}
+	return st, nil
+}
+
+func (c *Conn) ExecContext(_ context.Context, q string, args []driver.NamedValue) (driver.Result, error) {
+	resultContainer, err := c.api.ConnExec(c.id, q, args)
+	if err != nil {
+		return nil, err
+	}
+	res := &wrapperResult{
+		res: resultContainer,
+	}
+	return res, nil
+}
+
+func (c *Conn) QueryContext(_ context.Context, q string, args []driver.NamedValue) (driver.Rows, error) {
+	rowsID, err := c.api.ConnQuery(c.id, q, args)
+	if err != nil {
+		return nil, err
+	}
+
+	rows := &wrapperRows{
+		id:  rowsID,
+		api: c.api,
+	}
+	return rows, nil
+}
+
+func (c *Conn) Ping(_ context.Context) error {
+	return c.api.ConnPing(c.id)
+}
+
+func (c *Conn) Close() error {
+	return c.api.ConnClose(c.id)
+}