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Object Automation Web library
/* Copyright 1999 Vince Via [email protected]
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 com.viaoa.jsp;
import java.awt.image.BufferedImage;
import java.util.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.viaoa.hub.*;
import com.viaoa.image.OAImageUtil;
import com.viaoa.object.*;
import com.viaoa.util.*;
import com.viaoa.util.Base64;
/**
* Allows for uploading and saving (as java jpg) using the Croppie + File input.
*
* http://foliotek.github.io/Croppie/#documentation
*
* This uses an Html Label, or other component that supports onClick, to then
* popup a file input and then croppie, and then uses ajax submit to save the
* image.
*
*
protected OACroppieFileInput cfi;
public OACroppieFileInput getCroppieFileInput() {
if (cfi != null) return cfi;
cfi = new OACroppieFileInput("cfiUpload", modelEmployee.getHub(), EmployeePP.avatar().bytes()) {
@Override
protected void onSetValue(byte[] bs) {
if (bs == null) return;
Employee emp = modelEmployee.getEmployee();
if (emp != null) {
// make sure that an Avatar exists
if (emp.getAvatar() == null) {
emp.setAvatar(new ImageStore());
}
}
super.onSetValue(bs);
if (emp != null) emp.save();
}
};
return cfi;
}
* @author vvia
*
*/
public class OACroppieFileInput implements OAJspComponent, OAJspRequirementsInterface {
private static final long serialVersionUID = 1L;
protected Hub hub;
protected String id;
protected String property;
protected OAForm form;
protected String lastAjaxSent;
public OACroppieFileInput(String id, Hub hub, String property) {
this.id = id;
this.hub = hub;
this.property = property;
}
public OACroppieFileInput(Hub hub, String property) {
this.hub = hub;
this.property = property;
}
public Hub getHub() {
return hub;
}
@Override
public boolean isChanged() {
return false;
}
@Override
public String getId() {
return id;
}
@Override
public void setId(String id) {
this.id = id;
}
@Override
public void reset() {
}
@Override
public void setForm(OAForm form) {
this.form = form;
}
@Override
public OAForm getForm() {
return this.form;
}
@Override
public boolean _beforeFormSubmitted() {
return true;
}
@Override
public boolean _onFormSubmitted(HttpServletRequest req, HttpServletResponse resp, HashMap hmNameValue) {
String s = req.getParameter("oacommand");
if (s == null && hmNameValue != null) {
String[] ss = hmNameValue.get("oacommand");
if (ss != null && ss.length > 0) s = ss[0];
}
boolean bWasSubmitted = (id != null && id.equals(s));
if (bWasSubmitted && hmNameValue != null) {
String[] ss = hmNameValue.get("oahidden"+id);
if (ss != null && ss.length > 0 && ss[0] != null && ss[0].length() != 0) {
s = ss[0];
if (s.startsWith("data:image")) {
String s2 = ";base64,";
int pos = s.indexOf(s2);
if (pos > 0) s = s.substring(pos+s2.length());
}
char[] c = new char[s.length()];
s.getChars(0, s.length(), c, 0);
byte[] bs = Base64.decode(c);
try {
BufferedImage bi = OAImageUtil.convertToBufferedImage(bs);
byte[] bs2 = OAImageUtil.convertToJavaJPG(bi); // this is the format for storing images internally (ex: database)
bs = bs2;
}
catch (Exception e) {
throw new RuntimeException("exception while storing image", e);
}
onSetValue(bs);
}
}
return bWasSubmitted;
}
/**
* only called when the image for croppie is submitted (ajax)
*/
protected void onSetValue(byte[] bs) {
if (bs != null && hub != null && property != null) {
Object objx = hub.getAO();
if (objx instanceof OAObject) {
((OAObject) objx).setProperty(property, bs);
}
}
}
@Override
public String _onSubmit(String forwardUrl) {
return onSubmit(forwardUrl);
}
@Override
public String onSubmit(String forwardUrl) {
return forwardUrl;
}
@Override
public String _afterFormSubmitted(String forwardUrl) {
return afterFormSubmitted(forwardUrl);
}
@Override
public String afterFormSubmitted(String forwardUrl) {
return forwardUrl;
}
@Override
public String getScript() {
lastAjaxSent = null;
StringBuilder sb = new StringBuilder(1024);
sb.append("\n");
// Bind OACroppieFileInput to id='cfiUpload'
// create hidden input for storing base64 img
sb.append("$('form').prepend(\"\");\n");
// create hidden fileInput to invoke have user select an image file
sb.append("$('#cfiUpload').after(\"\");\n");
// listen for user selecting an image to then use croppie
sb.append("$('#cfiUploadFileInput').on('change', function() {\n");
sb.append(" if (!this.files || !this.files[0]) return;\n");
sb.append(" var reader = new FileReader();\n");
sb.append(" reader.onload = function(e) {\n");
sb.append(" cfiUploadCroppie.croppie('bind', {\n");
sb.append(" url : e.target.result\n");
sb.append(" });\n");
sb.append(" };\n");
sb.append(" reader.readAsDataURL(this.files[0]);\n");
sb.append(" this.value = null;\n");
sb.append(" $('#cfiUploadDlg').dialog('open');\n");
sb.append("});\n");
// have mouse click invoke the hidden file input to have user select a file
sb.append("$('#cfiUpload').attr('for', 'cfiUploadFileInput');\n");
// add modal dialog, with croppie component
sb.append("$('#cfiUpload').after(\"\");\n");
sb.append("$('#cfiUploadDlg').dialog({\n");
sb.append(" autoOpen : false,\n");
sb.append(" modal : true,\n");
sb.append(" resizable : false,\n");
sb.append(" draggable : false,\n");
sb.append(" width : 500,\n");
sb.append(" buttons : {\n");
sb.append(" 'Cancel' : function() {\n");
sb.append(" $(this).dialog('close');\n");
sb.append(" },\n");
sb.append(" 'Ok' : function() {\n");
sb.append(" cfiUploadSubmit(this);\n");
sb.append(" $(this).dialog('close');\n");
sb.append(" }\n");
sb.append(" }\n");
sb.append("});\n");
// croppie
sb.append("var cfiUploadCroppie = $('#cfiUploadCroppie').croppie({\n");
sb.append(" viewport : {\n");
sb.append(" width : 250,\n");
sb.append(" height : 250,\n");
sb.append(" type : 'circle'\n");
sb.append(" },\n");
sb.append(" boundary : {\n");
sb.append(" width : 300,\n");
sb.append(" height : 300\n");
sb.append(" }\n");
sb.append("});\n");
sb.append("function cfiUploadSubmit() {\n");
sb.append(" cfiUploadCroppie.croppie('result', {\n");
sb.append(" type : 'base64',\n");
sb.append(" format : 'jpg',\n");
sb.append(" size : {\n");
sb.append(" width : 240,\n");
sb.append(" height : 240\n");
sb.append(" }\n");
sb.append(" }).then(function(resp) {\n");
sb.append(" $('#oahiddencfiUpload').val(resp);\n");
sb.append(" var args = $('form:eq(0)').serialize();\n");
sb.append(" args = 'oacommand=cfiUpload&' + args;\n");
sb.append(" $.ajax({\n");
sb.append(" type : 'POST',\n");
sb.append(" data : args,\n");
sb.append(" url : 'oaajax.jsp',\n");
sb.append(" success : function(data) {\n");
sb.append(" if (data) eval(data);\n");
sb.append(" },\n");
sb.append(" dataType : 'text'\n");
sb.append(" });\n");
sb.append(" });\n");
sb.append("}\n");
String s = getAjaxScript();
if (s != null) sb.append(s);
String js = sb.toString();
js = OAString.convert(js, "cfiUpload", getId());
return js;
}
@Override
public String getVerifyScript() {
return null;
}
@Override
public String getAjaxScript() {
StringBuilder sb = new StringBuilder(1024);
sb.append("$('#oahidden"+id+"').val('');");
String js = sb.toString();
return js;
}
@Override
public void setEnabled(boolean b) {
}
@Override
public boolean getEnabled() {
return hub == null || hub.isValid();
}
@Override
public void setVisible(boolean b) {
}
@Override
public boolean getVisible() {
return true;
}
@Override
public String getForwardUrl() {
return null;
}
public String[] getRequiredJsNames() {
ArrayList al = new ArrayList<>();
al.add(OAJspDelegate.JS_jquery);
al.add(OAJspDelegate.JS_croppie);
String[] ss = new String[al.size()];
return al.toArray(ss);
}
@Override
public String[] getRequiredCssNames() {
ArrayList al = new ArrayList<>();
al.add(OAJspDelegate.CSS_bootstrap);
al.add(OAJspDelegate.CSS_croppie);
String[] ss = new String[al.size()];
return al.toArray(ss);
}
@Override
public String getEditorHtml(OAObject obj) {
return null;
}
@Override
public String getRenderHtml(OAObject obj) {
return null;
}
@Override
public void _beforeOnSubmit() {
}
}
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