From 0f2ac430ceebeaa9ed9ca46de9c8ce069d81ee00 Mon Sep 17 00:00:00 2001
From: Jan-Lukas Else <mail@jlelse.de>
Date: Tue, 21 Jul 2020 21:40:39 +0200
Subject: [PATCH] Simplify image compression

---
 go.mod              |  1 -
 go.sum              |  2 -
 imagecompression.go | 93 ++++++++++++++++++++++++++++++++++++++-------
 3 files changed, 79 insertions(+), 17 deletions(-)

diff --git a/go.mod b/go.mod
index 429e5ae..949edeb 100644
--- a/go.mod
+++ b/go.mod
@@ -3,7 +3,6 @@ module git.jlel.se/jlelse/hugo-micropub
 go 1.14
 
 require (
-	codeberg.org/jlelse/tinify v0.0.0-20200123222407-7fc9c21822b0
 	github.com/anmitsu/go-shlex v0.0.0-20200514113438-38f4b401e2be // indirect
 	github.com/gliderlabs/ssh v0.3.0 // indirect
 	github.com/go-git/go-git/v5 v5.1.0
diff --git a/go.sum b/go.sum
index 47fb773..8433bcf 100644
--- a/go.sum
+++ b/go.sum
@@ -1,5 +1,3 @@
-codeberg.org/jlelse/tinify v0.0.0-20200123222407-7fc9c21822b0 h1:pJX79kTd01NtxEnzhfd4OU2SY9fquKVoO47DUeNKe+8=
-codeberg.org/jlelse/tinify v0.0.0-20200123222407-7fc9c21822b0/go.mod h1:X6cM4Sn0aL/4VQ/ku11yxmiV0WIk5XAaYEPHQLQjFFM=
 github.com/alcortesm/tgz v0.0.0-20161220082320-9c5fe88206d7 h1:uSoVVbwJiQipAclBbw+8quDsfcvFjOpI5iCf4p/cqCs=
 github.com/alcortesm/tgz v0.0.0-20161220082320-9c5fe88206d7/go.mod h1:6zEj6s6u/ghQa61ZWa/C2Aw3RkjiTBOix7dkqa1VLIs=
 github.com/anmitsu/go-shlex v0.0.0-20161002113705-648efa622239 h1:kFOfPq6dUM1hTo4JG6LR5AXSUEsOjtdm0kw0FtQtMJA=
diff --git a/imagecompression.go b/imagecompression.go
index 3471bca..e0539a0 100644
--- a/imagecompression.go
+++ b/imagecompression.go
@@ -1,13 +1,15 @@
 package main
 
 import (
+	"bytes"
+	"encoding/json"
 	"errors"
+	"io"
 	"io/ioutil"
+	"net/http"
 	"os"
 	"sort"
 	"strings"
-
-	tfgo "codeberg.org/jlelse/tinify"
 )
 
 type ImageCompression interface {
@@ -32,32 +34,27 @@ func (t *Tinify) Compress(url string) (location string, err error) {
 		err = errors.New("file not supported")
 		return
 	}
-	tfgo.SetKey(t.key)
-	s, e := tfgo.FromUrl(url)
+	// Shrink
+	shrinkedUrl, e := t.shrink(url)
 	if e != nil {
 		err = errors.New("failed to compress file")
 		return
 	}
-	e = s.Resize(&tfgo.ResizeOption{
-		Method: tfgo.ResizeMethodScale,
-		Width:  2000,
-	})
-	if e != nil {
-		err = errors.New("failed to resize file")
-		return
-	}
+	// Create temp file
 	file, e := ioutil.TempFile("", "tiny-*."+fileExtension)
 	if e != nil {
 		err = errors.New("failed to create temporary file")
 		return
 	}
 	defer func() {
+		// Cleanup
 		_ = file.Close()
 		_ = os.Remove(file.Name())
 	}()
-	e = s.ToFile(file.Name())
+	// Resize and download image
+	e = t.resize(shrinkedUrl, file)
 	if e != nil {
-		err = errors.New("failed to save compressed file")
+		err = errors.New("failed to resize file or save compressed file")
 		return
 	}
 	hashFile, e := os.Open(file.Name())
@@ -73,3 +70,71 @@ func (t *Tinify) Compress(url string) (location string, err error) {
 	location, err = SelectedMediaStorage.Upload(fileName+"."+fileExtension, file)
 	return
 }
+
+func (t *Tinify) shrink(source string) (string, error) {
+	type Source struct {
+		Url string `json:"url"`
+	}
+	data := struct {
+		Source Source `json:"source"`
+	}{
+		Source: Source{
+			Url: source,
+		},
+	}
+	body := new(bytes.Buffer)
+	err := json.NewEncoder(body).Encode(data)
+	if err != nil {
+		return "", err
+	}
+	req, err := http.NewRequest("POST", "https://api.tinify.com/shrink", body)
+	if err != nil {
+		return "", err
+	}
+	req.SetBasicAuth("api", t.key)
+	req.Header.Set("Content-Type", "application/json")
+	resp, err := http.DefaultClient.Do(req)
+	if err != nil {
+		return "", err
+	}
+	if resp.StatusCode != 201 {
+		return "", errors.New("not 201 response code")
+	}
+	return resp.Header.Get("Location"), nil
+}
+
+func (t *Tinify) resize(output string, file *os.File) error {
+	type Resize struct {
+		Method string `json:"method"`
+		Width  int    `json:"width"`
+	}
+	data := struct {
+		Resize Resize `json:"resize"`
+	}{
+		Resize: Resize{
+			Method: "scale",
+			Width:  2000,
+		},
+	}
+	body := new(bytes.Buffer)
+	err := json.NewEncoder(body).Encode(data)
+	if err != nil {
+		return err
+	}
+	req, err := http.NewRequest("POST", output, body)
+	if err != nil {
+		return err
+	}
+	req.SetBasicAuth("api", t.key)
+	req.Header.Set("Content-Type", "application/json")
+	resp, err := http.DefaultClient.Do(req)
+	if err != nil {
+		return err
+	}
+	if resp.StatusCode != 200 {
+		return errors.New("not 201 response code")
+	}
+	defer resp.Body.Close()
+	_, err = io.Copy(file, resp.Body)
+	return err
+}