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// Copyright 2018 The Hugo Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package minifier
import (
"github.com/gohugoio/hugo/minifiers"
"github.com/gohugoio/hugo/resource"
)
// Client for minification of Resource objects. Supported minfiers are:
// css, html, js, json, svg and xml.
type Client struct {
rs *resource.Spec
m minifiers.Client
}
// New creates a new Client given a specification. Note that it is the media types
// configured for the site that is used to match files to the correct minifier.
func New(rs *resource.Spec) *Client {
return &Client{rs: rs, m: minifiers.New(rs.MediaTypes, rs.OutputFormats)}
}
type minifyTransformation struct {
rs *resource.Spec
m minifiers.Client
}
func (t *minifyTransformation) Key() resource.ResourceTransformationKey {
return resource.NewResourceTransformationKey("minify")
}
func (t *minifyTransformation) Transform(ctx *resource.ResourceTransformationCtx) error {
if err := t.m.Minify(ctx.InMediaType, ctx.To, ctx.From); err != nil {
return err
}
ctx.AddOutPathIdentifier(".min")
return nil
}
func (c *Client) Minify(res resource.Resource) (resource.Resource, error) {
return c.rs.Transform(
res,
&minifyTransformation{
rs: c.rs,
m: c.m},
)
}
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