Added model class for user preferences object

model/preference.go

@@ -0,0 +1,74 @@
+// Copyright (c) 2015 Spinpunch, Inc. All Rights Reserved.
+// See License.txt for license information.
+
+package model
+
+import (
+	"encoding/json"
+	"io"
+)
+
+const (
+	PREFERENCE_CATEGORY_DIRECT_CHANNELS = "direct_channels"
+	PREFERENCE_NAME_SHOWHIDE            = "show_hide"
+)
+
+type Preference struct {
+	UserId   string `json:"user_id"`
+	Category string `json:"category"`
+	Name     string `json:"name"`
+	AltId    string `json:"alt_id"`
+	Value    string `json:"value"`
+}
+
+func (o *Preference) ToJson() string {
+	b, err := json.Marshal(o)
+	if err != nil {
+		return ""
+	} else {
+		return string(b)
+	}
+}
+
+func PreferenceFromJson(data io.Reader) *Preference {
+	decoder := json.NewDecoder(data)
+	var o Preference
+	err := decoder.Decode(&o)
+	if err == nil {
+		return &o
+	} else {
+		return nil
+	}
+}
+
+func (o *Preference) IsValid() *AppError {
+	if len(o.UserId) != 26 {
+		return NewAppError("Preference.IsValid", "Invalid user id", "user_id="+o.UserId)
+	}
+
+	if len(o.Category) == 0 || len(o.Category) > 32 || !IsPreferenceCategoryValid(o.Category) {
+		return NewAppError("Preference.IsValid", "Invalid category", "category="+o.Category)
+	}
+
+	if len(o.Name) == 0 || len(o.Name) > 32 || !IsPreferenceNameValid(o.Name) {
+		return NewAppError("Preference.IsValid", "Invalid name", "name="+o.Name)
+	}
+
+	if o.AltId != "" && len(o.AltId) != 26 {
+		return NewAppError("Preference.IsValid", "Invalid alternate id", "altId="+o.AltId)
+	}
+
+	if len(o.Value) > 128 {
+		return NewAppError("Preference.IsValid", "Value is too long", "value="+o.Value)
+	}
+
+	return nil
+}
+
+func IsPreferenceCategoryValid(category string) bool {
+	return category == PREFERENCE_CATEGORY_DIRECT_CHANNELS
+}
+
+func IsPreferenceNameValid(name string) bool {
+	return name == PREFERENCE_NAME_SHOWHIDE
+}

model/preference_test.go

@@ -0,0 +1,62 @@
+// Copyright (c) 2015 Spinpunch, Inc. All Rights Reserved.
+// See License.txt for license information.
+
+package model
+
+import (
+	"strings"
+	"testing"
+)
+
+func TestPreferenceIsValid(t *testing.T) {
+	preference := Preference{}
+
+	if err := preference.IsValid(); err == nil {
+		t.Fatal()
+	}
+
+	preference.UserId = NewId()
+	if err := preference.IsValid(); err == nil {
+		t.Fatal()
+	}
+
+	preference.Category = "1234garbage"
+	if err := preference.IsValid(); err == nil {
+		t.Fatal()
+	}
+
+	preference.Category = PREFERENCE_CATEGORY_DIRECT_CHANNELS
+	if err := preference.IsValid(); err == nil {
+		t.Fatal()
+	}
+
+	preference.Name = "1234garbage"
+	if err := preference.IsValid(); err == nil {
+		t.Fatal()
+	}
+
+	preference.Name = PREFERENCE_NAME_SHOWHIDE
+	if err := preference.IsValid(); err != nil {
+		t.Fatal()
+	}
+
+	preference.AltId = "1234garbage"
+	if err := preference.IsValid(); err == nil {
+		t.Fatal()
+	}
+
+	preference.AltId = NewId()
+	if err := preference.IsValid(); err != nil {
+		t.Fatal()
+	}
+
+	preference.Value = "1234garbage"
+	if err := preference.IsValid(); err != nil {
+		t.Fatal()
+	}
+
+	preference.Value = strings.Repeat("01234567890", 20)
+	if err := preference.IsValid(); err == nil {
+		t.Fatal()
+	}
+}