Add new file cli_table.js for console table

Summary:
New file cli_table.js, used for formatting the data that will
be passed in from the console.table functions, is added
here.

Reviewed By: avp

Differential Revision: D30108582

fbshipit-source-id: 059fe8f574b9adc7ef65badd8b67475605a1e48d

tools/node-hermes/nodelib/internal/cli_table.js

@@ -0,0 +1,90 @@
+'use strict';
+
+var _primordials = primordials,
+    ArrayPrototypeJoin = _primordials.ArrayPrototypeJoin,
+    ArrayPrototypeMap = _primordials.ArrayPrototypeMap,
+    MathCeil = _primordials.MathCeil,
+    MathMax = _primordials.MathMax,
+    MathMaxApply = _primordials.MathMaxApply,
+    ObjectPrototypeHasOwnProperty = _primordials.ObjectPrototypeHasOwnProperty,
+    StringPrototypeRepeat = _primordials.StringPrototypeRepeat;
+
+var _require = require('internal/util/inspect'),
+    getStringWidth = _require.getStringWidth; // The use of Unicode characters below is the only non-comment use of non-ASCII
+// Unicode characters in Node.js built-in modules. If they are ever removed or
+// rewritten with \u escapes, then a test will need to be (re-)added to Node.js
+// core to verify that Unicode characters work in built-ins.
+// Refs: https://github.com/nodejs/node/issues/10673
+
+
+var tableChars = {
+  /* eslint-disable node-core/non-ascii-character */
+  middleMiddle: '─',
+  rowMiddle: '┼',
+  topRight: '┐',
+  topLeft: '┌',
+  leftMiddle: '├',
+  topMiddle: '┬',
+  bottomRight: '┘',
+  bottomLeft: '└',
+  bottomMiddle: '┴',
+  rightMiddle: '┤',
+  left: '│ ',
+  right: ' │',
+  middle: ' │ '
+  /* eslint-enable node-core/non-ascii-character */
+
+};
+
+var renderRow = function renderRow(row, columnWidths) {
+  var out = tableChars.left;
+
+  for (var i = 0; i < row.length; i++) {
+    var cell = row[i];
+    var len = getStringWidth(cell);
+    var needed = (columnWidths[i] - len) / 2; // round(needed) + ceil(needed) will always add up to the amount
+    // of spaces we need while also left justifying the output.
+
+    out += StringPrototypeRepeat(' ', needed) + cell + StringPrototypeRepeat(' ', MathCeil(needed));
+    if (i !== row.length - 1) out += tableChars.middle;
+  }
+
+  out += tableChars.right;
+  return out;
+};
+
+var table = function table(head, columns) {
+  var rows = [];
+  var columnWidths = ArrayPrototypeMap(head, function (h) {
+    return getStringWidth(h);
+  });
+  var longestColumn = MathMaxApply(ArrayPrototypeMap(columns, function (a) {
+    return a.length;
+  }));
+  for (var i = 0; i < head.length; i++) {
+    var column = columns[i];
+
+    for (var j = 0; j < longestColumn; j++) {
+      if (rows[j] === undefined) rows[j] = [];
+      var value = rows[j][i] = ObjectPrototypeHasOwnProperty(column, j) ? column[j] : '';
+      var width = columnWidths[i] || 0;
+      var counted = getStringWidth(value);
+      columnWidths[i] = MathMax(width, counted);
+    }
+  }
+
+  var divider = ArrayPrototypeMap(columnWidths, function (i) {
+    return StringPrototypeRepeat(tableChars.middleMiddle, i + 2);
+  });
+  var result = tableChars.topLeft + ArrayPrototypeJoin(divider, tableChars.topMiddle) + tableChars.topRight + '\n' + renderRow(head, columnWidths) + '\n' + tableChars.leftMiddle + ArrayPrototypeJoin(divider, tableChars.rowMiddle) + tableChars.rightMiddle + '\n';
+
+  for (var _i = 0, _rows = rows; _i < _rows.length; _i++) {
+    var row = _rows[_i];
+    result += "".concat(renderRow(row, columnWidths), "\n");
+  }
+
+  result += tableChars.bottomLeft + ArrayPrototypeJoin(divider, tableChars.bottomMiddle) + tableChars.bottomRight;
+  return result;
+};
+
+module.exports = table;