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const Fieldset = { |
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LAST_FORM_QUERY: '.code-form--file:last-of-type', |
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addNew() { |
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const lastForm = document.querySelector(this.LAST_FORM_QUERY); |
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const newForm = this.getElement(); |
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const formsWrapper = lastForm.parentNode; |
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formsWrapper.insertBefore(newForm, lastForm.nextSibling); |
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}, |
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getElement() { |
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const index = this.getNextIndex(); |
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const fieldset = document.createElement('fieldset'); |
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fieldset.setAttribute('class', 'code-form--file'); |
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fieldset.setAttribute('data-index', index); |
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fieldset.innerHTML = |
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`<label class="code-form--label" for="name[${index}]">Nazwa pliku (opcjonalna)</label> |
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<input type="text" id="name[${index}]" name="name[${index}]" class="code-form--control"> |
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<label for="content[${index}]" class="code-form--label">Treść pliku</label> |
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<textarea name="content[${index}]" id="content[${index}]" rows="10" class="code-form--control code-form--control__textarea"></textarea>`; |
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return fieldset; |
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}, |
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getNextIndex() { |
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const currentIndex = parseInt(document.querySelector(this.LAST_FORM_QUERY).getAttribute('data-index'), 10); |
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return currentIndex + 1; |
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}, |
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}; |
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const NewFormButton = { |
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BUTTON_QUERY: '#new-file', |
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init() { |
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const button = document.querySelector(this.BUTTON_QUERY); |
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button.addEventListener('click', () => this.onClick()); |
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}, |
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onClick() { |
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Fieldset.addNew(); |
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}, |
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}; |
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const DragAndDrop = { |
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FILE_FORM_QUERY: '.code-form--file', |
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OVERLAY_WRAPPER_QUERY: '.main', |
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init() { |
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this.lastTarget = null; |
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this.appendOverlay(); |
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this.handleDragEnter(); |
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this.handleDragLeave(); |
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this.handleDragOver(); |
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this.handleDrop(); |
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}, |
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handleDragEnter() { |
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window.addEventListener('dragenter', (event) => { |
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if (this.isFile(event)) { |
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this.lastTarget = event.target; |
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this.showOverlay(); |
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} |
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}); |
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}, |
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handleDragLeave() { |
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window.addEventListener('dragleave', (event) => { |
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event.preventDefault(); |
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if (event.target === this.lastTarget) { |
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this.hideOverlay(); |
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} |
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}); |
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}, |
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handleDragOver() { |
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window.addEventListener('dragover', (event) => { |
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event.preventDefault(); |
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}); |
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}, |
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handleDrop() { |
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window.addEventListener('drop', (event) => { |
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event.preventDefault(); |
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this.hideOverlay(); |
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const files = [...event.dataTransfer.files] |
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.filter(file => this.isReadable(file)); |
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if (files.length === 0) { |
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return; |
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} |
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const fieldsetsToCreateNumber = files.length - this.getEmptyFieldsets().length; |
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this.createNewFieldsets(fieldsetsToCreateNumber); |
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const emptyFieldsets = this.getEmptyFieldsets(); |
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emptyFieldsets.forEach((fieldset, index) => this.fillFieldset(fieldset, files[index])) |
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}); |
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}, |
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106
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createNewFieldsets(number) { |
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for(let i = 0; i < number; i++) { |
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Fieldset.addNew(); |
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} |
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}, |
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112
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fillFieldset(fieldset, file) { |
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const input = fieldset.querySelector('input'); |
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const textarea = fieldset.querySelector('textarea'); |
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input.value = this.getFileName(file); |
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this.getFileContent(file).then(content => { |
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textarea.value = content; |
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}); |
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}, |
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123
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getEmptyFieldsets() { |
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const fieldsets = [...document.querySelectorAll(this.FILE_FORM_QUERY)]; |
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return fieldsets.filter(fieldset => this.isFieldsetEmpty(fieldset)); |
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}, |
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129
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isFieldsetEmpty(fieldset) { |
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const inputValue = fieldset.querySelector('input').value; |
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const textareaValue = fieldset.querySelector('textarea').value; |
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return inputValue + textareaValue === ''; |
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}, |
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136
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isFile(event) { |
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return event.dataTransfer.types.some(type => type === 'Files'); |
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}, |
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140
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isReadable(file) { |
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// Is it empty string, application/* or text/*? |
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return /(^$|application\/.+|text\/.+)/.exec(file.type); |
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}, |
144
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145
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getFileName(file) { |
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return file.name; |
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}, |
148
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149
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getFileContent(file) { |
150
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return new Promise(resolve => { |
151
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const fileReader = new FileReader(); |
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152
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153
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fileReader.readAsText(file); |
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fileReader.onload = (event) => { |
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resolve(event.target.result); |
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}; |
157
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}); |
158
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}, |
159
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160
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getOverlayElement() { |
161
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const overlay = document.createElement('div'); |
162
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overlay.classList.add('drop-overlay'); |
163
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overlay.innerHTML = `<p class="drop-overlay--text">Upuść pliki tutaj</p>`; |
164
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165
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return overlay; |
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}, |
167
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168
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appendOverlay() { |
169
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const overlayWrapper = document.querySelector(this.OVERLAY_WRAPPER_QUERY); |
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this.overlay = this.getOverlayElement(); |
171
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172
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overlayWrapper.appendChild(this.overlay); |
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}, |
174
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175
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showOverlay() { |
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this.overlay.classList.add('drop-overlay__active'); |
177
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}, |
178
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179
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hideOverlay() { |
180
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this.overlay.classList.remove('drop-overlay__active'); |
181
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}, |
182
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}; |
183
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184
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DragAndDrop.init(); |
185
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NewFormButton.init(); |
186
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This checks looks for references to variables that have not been declared. This is most likey a typographical error or a variable has been renamed.
To learn more about declaring variables in Javascript, see the MDN.