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CIS233W - Lab 3
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| <!DOCTYPE html> | |
| <html> | |
| <body> | |
| <div id="topbar"> | |
| <form method="POST" enctype="multipart/form-data"> | |
| <input type="file" id="upload" name="data" accept=".json" /> | |
| <input type="submit" value="Upload JSON" /> | |
| </form> | |
| </div> | |
| <h3>Raw File</h3> | |
| <code id="raw"> | |
| <?php | |
| if (!is_null($_FILES["data"])) { | |
| $file = fopen($_FILES["data"]["tmp_name"], "r") or die("Failed to read file"); | |
| $contents = fread($file, filesize($_FILES["data"]["tmp_name"])); | |
| echo $contents; | |
| fclose($file); | |
| } | |
| ?> | |
| </code> | |
| <h3>Rendered output</h3> | |
| <div id="render"> | |
| </div> | |
| <script src="main.js"></script> | |
| <script> | |
| function handleError(e) { | |
| alert(`${e.name}: ${e.message}`) | |
| } | |
| window.onload = function() { | |
| const el = document.getElementById('raw') | |
| const r = document.getElementById('render') | |
| const text = el.innerText.length === 0 ? '"No input"' : el.innerText | |
| try { | |
| const p = JSON.parse(text) | |
| const v = render(p) | |
| r.appendChild(v) | |
| } catch (e) { | |
| handleError(e) | |
| console.error(e) | |
| } | |
| } | |
| </script> | |
| </body> | |
| </html> |
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| function renderTableRow(row, isHeading) { | |
| isHeading = typeof isHeading === 'boolean' ? isHeading : false | |
| if (!Array.isArray(row)) throw new Error('Argument 1 is not an array') | |
| const el = document.createElement('tr') | |
| row.map((item) => { | |
| const el = document.createElement(isHeading ? 'th' : 'td') | |
| const r = render(item) | |
| el.appendChild(r) | |
| return el | |
| }).forEach((child) => el.appendChild(child)) | |
| return el | |
| } | |
| function renderTable(children, header) { | |
| if (!Array.isArray(children)) throw new Error('Argument 1 is not an array') | |
| const el = document.createElement('table') | |
| children = children.map((row) => renderTableRow(row)) | |
| header = Array.isArray(header) ? renderTableRow(header, true) : undefined | |
| const elements = [ | |
| header, | |
| ...children | |
| ].filter(v => !!v) | |
| elements.forEach((child) => el.appendChild(child)) | |
| return el | |
| } | |
| function renderList(children, isOrdered) { | |
| isOrdered = typeof isOrdered === 'boolean' ? isOrdered : false | |
| if (!Array.isArray(children)) throw new Error('Argument 1 is not an array') | |
| const el = document.createElement(isOrdered ? 'ol' : 'ul') | |
| children.map((child) => render(child)).forEach((child) => el.appendChild(child)) | |
| return el | |
| } | |
| function render(value) { | |
| const r = ({ | |
| 'number': () => value.toString(), | |
| 'string': () => value, | |
| 'boolean': () => value ? 'True' : 'False', | |
| 'function': () => (value.name.length > 0 ? value.name : 'anonymous function ') + '(' + new Array(value.length).fill(0).map((v, i) => `arg${i}`).join(', ') + ')', | |
| 'object': () => { | |
| if (Array.isArray(value)) { | |
| return renderList(value, true) | |
| } else { | |
| return renderTable(Object.entries(value), [ 'Key', 'Value' ]) | |
| } | |
| }, | |
| 'undefined': () => 'Undefined' | |
| })[typeof value] | |
| if (typeof r !== 'function') throw new Error('Unsupported type') | |
| const ret = r() | |
| if (typeof ret === 'string') { | |
| const el = document.createElement('p') | |
| el.innerText = ret | |
| el.classList.add('typed-' + typeof value) | |
| return el | |
| } | |
| return ret | |
| } |
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