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data.go
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data.go
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package main
import (
"database/sql"
"sort"
"strconv"
"time"
_ "github.com/mattn/go-sqlite3"
)
var passwordConfig = &argon2Config{
time: 1,
memory: 64 * 1024,
threads: 4,
keyLen: 32,
}
func insertOrUpdateUser(user, pass string) error {
passwordHash, err := generateArgonHash(passwordConfig, pass)
if err != nil {
return err
}
res, err := database.Exec("UPDATE users SET password = ? WHERE username = ?", passwordHash, user)
if err != nil {
return err
}
rows, err := res.RowsAffected()
if err != nil || rows == 1 {
return err
}
_, err = database.Exec("INSERT INTO users (username, password) VALUES (?, ?)", user, passwordHash)
return err
}
func testAuthAgainstDB(user, pass string) (bool, error) {
var passwordHash string
row := database.QueryRow("SELECT password FROM users WHERE username = ?", user)
err := row.Scan(&passwordHash)
if err == sql.ErrNoRows {
return false, nil
} else if err != nil {
return false, err
} else {
return compareWithArgonHash(pass, passwordHash)
}
}
func getSettings(username string) (map[string]string, error) {
rows, err := database.Query("SELECT setting_key, setting_value FROM settings WHERE username = ?", username)
defer rows.Close()
if err != nil {
return nil, err
}
result := make(map[string]string)
for rows.Next() {
var key, val string
err = rows.Scan(&key, &val)
if err != nil {
return nil, err
}
result[key] = val
}
return result, nil
}
func setSetting(key, val, username string) error {
res, err := database.Exec("UPDATE settings SET setting_value = ? WHERE setting_key = ? AND username = ?", val, key, username)
if err != nil {
return err
}
rows, err := res.RowsAffected()
if err != nil || rows == 1 {
return err
}
_, err = database.Exec("INSERT INTO settings (setting_key, setting_value, username) VALUES (?, ?, ?)", key, val, username)
return err
}
type goals struct {
TargetWeight float64
TargetDate string
BurnRate int
}
func getGoals(username string) (*goals, error) {
settings, err := getSettings(username)
if err != nil {
return nil, err
}
var targetWeight float64
weightVal, exists := settings["target_weight"]
if exists {
targetWeight, err = strconv.ParseFloat(weightVal, 32)
if err != nil {
return nil, err
}
}
date, _ := settings["target_date"]
burnRate := 0
burnRateVal, exists := settings["daily_burn_rate"]
if exists {
burnRate, err = strconv.Atoi(burnRateVal)
if err != nil {
return nil, err
}
}
return &goals{targetWeight, date, burnRate}, nil
}
func addWeightEntry(day time.Time, val float64, username string) error {
date := day.Format(time.RFC3339)
_, err := database.Exec("INSERT INTO weight_entry (date, weight, username) VALUES (?, ?, ?)", date, val, username)
return err
}
func getCalorieCategories(username string) ([]string, error) {
rows, err := database.Query("SELECT DISTINCT category FROM calorie_entry WHERE username = ?", username)
defer rows.Close()
if err != nil {
return nil, err
}
result := make([]string, 0)
for rows.Next() {
var val string
err = rows.Scan(&val)
if err != nil {
return nil, err
}
result = append(result, val)
}
return result, nil
}
func addCalorieEntry(day time.Time, amount int, category, username string) error {
date := day.Format(time.RFC3339)
_, err := database.Exec("INSERT INTO calorie_entry (date, amount, category, username) VALUES (?, ?, ?, ?)", date, amount, category, username)
return err
}
func deleteCalorieEntry(id int, username string) error {
_, err := database.Exec("DELETE FROM calorie_entry WHERE Id = ? AND username = ?", id, username)
return err
}
func getDayStartAndEnd(day time.Time) (string, string) {
y, m, d := day.Date()
start := time.Date(y, m, d, 0, 0, 0, 0, day.Location())
endParam := start.Add(24 * time.Hour).Format(time.RFC3339)
return start.Format(time.RFC3339), endParam
}
func getDayWeight(day time.Time, username string) (float64, error) {
start, end := getDayStartAndEnd(day)
var todaysWeight float64
row := database.QueryRow("SELECT weight FROM weight_entry WHERE date >= ? AND date <= ? AND username = ? ORDER BY date DESC LIMIT 1", start, end, username)
err := row.Scan(&todaysWeight)
if err == sql.ErrNoRows {
return 0, nil
} else if err != nil {
return 0, err
} else {
return todaysWeight, nil
}
}
func getLatestWeight(username string) (float64, error) {
var lastWeight float64
row := database.QueryRow("SELECT weight FROM weight_entry WHERE username = ? ORDER BY date DESC LIMIT 1", username)
err := row.Scan(&lastWeight)
if err == sql.ErrNoRows {
return 0, nil
} else if err != nil {
return 0, err
} else {
return lastWeight, nil
}
}
type calorieEntry struct {
ID int
Amount int
Category string
}
func getDayCalories(day time.Time, username string) ([]calorieEntry, error) {
start, end := getDayStartAndEnd(day)
rows, err := database.Query("SELECT id, amount, category FROM calorie_entry WHERE date >= ? AND date <= ? AND username = ?", start, end, username)
defer rows.Close()
if err != nil {
return nil, err
}
result := make([]calorieEntry, 0)
for rows.Next() {
var row calorieEntry
err = rows.Scan(&row.ID, &row.Amount, &row.Category)
if err != nil {
return nil, err
}
result = append(result, row)
}
return result, nil
}
func clearAllEntries(username string) error {
_, err := database.Exec("delete from settings WHERE username = ?", username)
if err != nil {
return err
}
_, err = database.Exec("delete from weight_entry WHERE username = ?", username)
if err != nil {
return err
}
_, err = database.Exec("delete from calorie_entry WHERE username = ?", username)
if err != nil {
return err
}
return nil
}
type recordedDay struct {
Date string
Weight float64
Entries []calorieEntry
Total int
}
func allDaysForUser(username string) ([]recordedDay, error) {
days, err := createDaysFromWeights(username)
if err != nil {
return nil, err
}
days, err = appendEntriesToDays(username, days)
return sortDays(days), nil
}
func createDaysFromWeights(username string) (map[string]recordedDay, error) {
weightRows, err := database.Query("SELECT weight, date FROM weight_entry WHERE username = ? ORDER BY date", username)
defer weightRows.Close()
if err != nil {
return nil, err
}
days := make(map[string]recordedDay)
for weightRows.Next() {
var weight float64
var date string
err = weightRows.Scan(&weight, &date)
if err != nil {
return nil, err
}
dateVal, err := time.Parse(time.RFC3339, date)
if err != nil {
return nil, err
}
start, _ := getDayStartAndEnd(dateVal)
days[start] = recordedDay{start, weight, []calorieEntry{}, 0}
}
return days, nil
}
func appendEntriesToDays(username string, days map[string]recordedDay) (map[string]recordedDay, error) {
caloryRows, err := database.Query("SELECT id, amount, category, date FROM calorie_entry WHERE username = ? ORDER BY date", username)
defer caloryRows.Close()
if err != nil {
return nil, err
}
for caloryRows.Next() {
var id int
var amount int
var category, date string
err = caloryRows.Scan(&id, &amount, &category, &date)
if err != nil {
return nil, err
}
dateVal, err := time.Parse(time.RFC3339, date)
if err != nil {
return nil, err
}
start, _ := getDayStartAndEnd(dateVal)
entry, exists := days[start]
if !exists {
continue
}
entry.Entries = append(entry.Entries, calorieEntry{id, amount, category})
days[start] = entry
}
return days, nil
}
func sortDays(days map[string]recordedDay) []recordedDay {
keys := make([]string, len(days))
i := 0
for k := range days {
keys[i] = k
i++
}
sort.Strings(keys)
result := make([]recordedDay, len(days))
j := 0
for _, k := range keys {
result[j] = days[k]
j++
}
return result
}