flow like the river

VISUALIZACION/node_modules/graphql/language/blockString.js

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+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.dedentBlockStringValue = dedentBlockStringValue;
+exports.getBlockStringIndentation = getBlockStringIndentation;
+exports.printBlockString = printBlockString;
+
+/**
+ * Produces the value of a block string from its parsed raw value, similar to
+ * CoffeeScript's block string, Python's docstring trim or Ruby's strip_heredoc.
+ *
+ * This implements the GraphQL spec's BlockStringValue() static algorithm.
+ *
+ * @internal
+ */
+function dedentBlockStringValue(rawString) {
+  // Expand a block string's raw value into independent lines.
+  var lines = rawString.split(/\r\n|[\n\r]/g); // Remove common indentation from all lines but first.
+
+  var commonIndent = getBlockStringIndentation(rawString);
+
+  if (commonIndent !== 0) {
+    for (var i = 1; i < lines.length; i++) {
+      lines[i] = lines[i].slice(commonIndent);
+    }
+  } // Remove leading and trailing blank lines.
+
+
+  var startLine = 0;
+
+  while (startLine < lines.length && isBlank(lines[startLine])) {
+    ++startLine;
+  }
+
+  var endLine = lines.length;
+
+  while (endLine > startLine && isBlank(lines[endLine - 1])) {
+    --endLine;
+  } // Return a string of the lines joined with U+000A.
+
+
+  return lines.slice(startLine, endLine).join('\n');
+}
+
+function isBlank(str) {
+  for (var i = 0; i < str.length; ++i) {
+    if (str[i] !== ' ' && str[i] !== '\t') {
+      return false;
+    }
+  }
+
+  return true;
+}
+/**
+ * @internal
+ */
+
+
+function getBlockStringIndentation(value) {
+  var _commonIndent;
+
+  var isFirstLine = true;
+  var isEmptyLine = true;
+  var indent = 0;
+  var commonIndent = null;
+
+  for (var i = 0; i < value.length; ++i) {
+    switch (value.charCodeAt(i)) {
+      case 13:
+        //  \r
+        if (value.charCodeAt(i + 1) === 10) {
+          ++i; // skip \r\n as one symbol
+        }
+
+      // falls through
+
+      case 10:
+        //  \n
+        isFirstLine = false;
+        isEmptyLine = true;
+        indent = 0;
+        break;
+
+      case 9: //   \t
+
+      case 32:
+        //  <space>
+        ++indent;
+        break;
+
+      default:
+        if (isEmptyLine && !isFirstLine && (commonIndent === null || indent < commonIndent)) {
+          commonIndent = indent;
+        }
+
+        isEmptyLine = false;
+    }
+  }
+
+  return (_commonIndent = commonIndent) !== null && _commonIndent !== void 0 ? _commonIndent : 0;
+}
+/**
+ * Print a block string in the indented block form by adding a leading and
+ * trailing blank line. However, if a block string starts with whitespace and is
+ * a single-line, adding a leading blank line would strip that whitespace.
+ *
+ * @internal
+ */
+
+
+function printBlockString(value) {
+  var indentation = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : '';
+  var preferMultipleLines = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : false;
+  var isSingleLine = value.indexOf('\n') === -1;
+  var hasLeadingSpace = value[0] === ' ' || value[0] === '\t';
+  var hasTrailingQuote = value[value.length - 1] === '"';
+  var hasTrailingSlash = value[value.length - 1] === '\\';
+  var printAsMultipleLines = !isSingleLine || hasTrailingQuote || hasTrailingSlash || preferMultipleLines;
+  var result = ''; // Format a multi-line block quote to account for leading space.
+
+  if (printAsMultipleLines && !(isSingleLine && hasLeadingSpace)) {
+    result += '\n' + indentation;
+  }
+
+  result += indentation ? value.replace(/\n/g, '\n' + indentation) : value;
+
+  if (printAsMultipleLines) {
+    result += '\n';
+  }
+
+  return '"""' + result.replace(/"""/g, '\\"""') + '"""';
+}