Begin splitting models from handlers with User

internal/models/users.go

@@ -0,0 +1,39 @@
+package models
+
+import (
+	"crypto/sha256"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"strings"
+)
+
+type User struct {
+	UserId          int64
+	DefaultCurrency int64 // SecurityId of default currency, or ISO4217 code for it if creating new user
+	Name            string
+	Username        string
+	Password        string `db:"-"`
+	PasswordHash    string `json:"-"`
+	Email           string
+}
+
+const BogusPassword = "password"
+
+func (u *User) Write(w http.ResponseWriter) error {
+	enc := json.NewEncoder(w)
+	return enc.Encode(u)
+}
+
+func (u *User) Read(json_str string) error {
+	dec := json.NewDecoder(strings.NewReader(json_str))
+	return dec.Decode(u)
+}
+
+func (u *User) HashPassword() {
+	password_hasher := sha256.New()
+	io.WriteString(password_hasher, u.Password)
+	u.PasswordHash = fmt.Sprintf("%x", password_hasher.Sum(nil))
+	u.Password = ""
+}