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server/node_modules/graphql/language/blockStringValue.mjs

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+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ *  strict
+ */
+
+/**
+ * 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.
+ */
+export default function blockStringValue(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 = null;
+
+  for (var i = 1; i < lines.length; i++) {
+    var line = lines[i];
+    var indent = leadingWhitespace(line);
+
+    if (indent < line.length && (commonIndent === null || indent < commonIndent)) {
+      commonIndent = indent;
+
+      if (commonIndent === 0) {
+        break;
+      }
+    }
+  }
+
+  if (commonIndent) {
+    for (var _i = 1; _i < lines.length; _i++) {
+      lines[_i] = lines[_i].slice(commonIndent);
+    }
+  } // Remove leading and trailing blank lines.
+
+
+  while (lines.length > 0 && isBlank(lines[0])) {
+    lines.shift();
+  }
+
+  while (lines.length > 0 && isBlank(lines[lines.length - 1])) {
+    lines.pop();
+  } // Return a string of the lines joined with U+000A.
+
+
+  return lines.join('\n');
+}
+
+function leadingWhitespace(str) {
+  var i = 0;
+
+  while (i < str.length && (str[i] === ' ' || str[i] === '\t')) {
+    i++;
+  }
+
+  return i;
+}
+
+function isBlank(str) {
+  return leadingWhitespace(str) === str.length;
+}