Add table and model to persist user login sessions.

db/migrations/20190819192917_CreateUserSessions.sql

@@ -0,0 +1,11 @@
+-- +goose Up
+CREATE TABLE user_sessions (
+  id INTEGER PRIMARY KEY,
+  token VARCHAR(255),
+  username VARCHAR(255),
+  createdat DATETIME
+);
+CREATE UNIQUE INDEX token ON user_sessions(token);
+
+-- +goose Down
+DROP TABLE user_sessions;

model/database.go

@@ -37,6 +37,7 @@ type Database struct {
 	sponsorSlideMap  *modl.DbMap
 	scheduleBlockMap *modl.DbMap
 	awardMap         *modl.DbMap
+	userSessionMap   *modl.DbMap
 }
 
 // Opens the SQLite database at the given path, creating it if it doesn't exist, and runs any pending
@@ -128,6 +129,9 @@ func (database *Database) mapTables() {
 
 	database.awardMap = modl.NewDbMap(database.db, dialect)
 	database.awardMap.AddTableWithName(Award{}, "awards").SetKeys(true, "Id")
+
+	database.userSessionMap = modl.NewDbMap(database.db, dialect)
+	database.userSessionMap.AddTableWithName(UserSession{}, "user_sessions").SetKeys(true, "Id")
 }
 
 func serializeHelper(target *string, source interface{}) error {

model/user_session.go

@@ -0,0 +1,38 @@
+// Copyright 2019 Team 254. All Rights Reserved.
+// Author: pat@patfairbank.com (Patrick Fairbank)
+//
+// Model and datastore CRUD methods for a user login session.
+
+package model
+
+import "time"
+
+type UserSession struct {
+	Id        int
+	Token     string
+	Username  string
+	CreatedAt time.Time
+}
+
+func (database *Database) CreateUserSession(session *UserSession) error {
+	return database.userSessionMap.Insert(session)
+}
+
+func (database *Database) GetUserSessionByToken(token string) (*UserSession, error) {
+	session := new(UserSession)
+	err := database.userSessionMap.SelectOne(session, "SELECT * FROM user_sessions WHERE token = ?", token)
+	if err != nil && err.Error() == "sql: no rows in result set" {
+		session = nil
+		err = nil
+	}
+	return session, err
+}
+
+func (database *Database) DeleteUserSession(session *UserSession) error {
+	_, err := database.userSessionMap.Delete(session)
+	return err
+}
+
+func (database *Database) TruncateUserSessions() error {
+	return database.userSessionMap.TruncateTables()
+}

model/user_session_test.go

@@ -0,0 +1,47 @@
+// Copyright 2019 Team 254. All Rights Reserved.
+// Author: pat@patfairbank.com (Patrick Fairbank)
+
+package model
+
+import (
+	"github.com/stretchr/testify/assert"
+	"testing"
+	"time"
+)
+
+func TestGetNonexistentUserSession(t *testing.T) {
+	db := setupTestDb(t)
+
+	session, err := db.GetUserSessionByToken("blorpy")
+	assert.Nil(t, err)
+	assert.Nil(t, session)
+}
+
+func TestUserSessionCrud(t *testing.T) {
+	db := setupTestDb(t)
+
+	session := UserSession{0, "token1", "Bertha", time.Now()}
+	err := db.CreateUserSession(&session)
+	assert.Nil(t, err)
+	session2, err := db.GetUserSessionByToken("token1")
+	assert.Nil(t, err)
+	assert.Equal(t, session.Token, session2.Token)
+	assert.Equal(t, session.Username, session2.Username)
+	assert.True(t, session.CreatedAt.Equal(session2.CreatedAt))
+
+	db.DeleteUserSession(&session)
+	session2, err = db.GetUserSessionByToken("token1")
+	assert.Nil(t, err)
+	assert.Nil(t, session2)
+}
+
+func TestTruncateUserSessions(t *testing.T) {
+	db := setupTestDb(t)
+
+	session := UserSession{0, "token1", "Bertha", time.Now()}
+	db.CreateUserSession(&session)
+	db.TruncateUserSessions()
+	session2, err := db.GetUserSessionByToken("token1")
+	assert.Nil(t, err)
+	assert.Nil(t, session2)
+}