1// Copyright 2017 The Hugo Authors. All rights reserved. 2// 3// Licensed under the Apache License, Version 2.0 (the "License"); 4// you may not use this file except in compliance with the License. 5// You may obtain a copy of the License at 6// http://www.apache.org/licenses/LICENSE-2.0 7// 8// Unless required by applicable law or agreed to in writing, software 9// distributed under the License is distributed on an "AS IS" BASIS, 10// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 11// See the License for the specific language governing permissions and 12// limitations under the License. 13 14// Package cast provides template functions for data type conversions. 15package cast 16 17import ( 18 "html/template" 19 20 _cast "github.com/spf13/cast" 21) 22 23// New returns a new instance of the cast-namespaced template functions. 24func New() *Namespace { 25 return &Namespace{} 26} 27 28// Namespace provides template functions for the "cast" namespace. 29type Namespace struct { 30} 31 32// ToInt converts the given value to an int. 33func (ns *Namespace) ToInt(v interface{}) (int, error) { 34 v = convertTemplateToString(v) 35 return _cast.ToIntE(v) 36} 37 38// ToString converts the given value to a string. 39func (ns *Namespace) ToString(v interface{}) (string, error) { 40 return _cast.ToStringE(v) 41} 42 43// ToFloat converts the given value to a float. 44func (ns *Namespace) ToFloat(v interface{}) (float64, error) { 45 v = convertTemplateToString(v) 46 return _cast.ToFloat64E(v) 47} 48 49func convertTemplateToString(v interface{}) interface{} { 50 switch vv := v.(type) { 51 case template.HTML: 52 v = string(vv) 53 case template.CSS: 54 v = string(vv) 55 case template.HTMLAttr: 56 v = string(vv) 57 case template.JS: 58 v = string(vv) 59 case template.JSStr: 60 v = string(vv) 61 } 62 return v 63} 64