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Frontend-Learner/node_modules/eslint-plugin-jsdoc/src/rules/checkIndentation.js

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+import iterateJsdoc from '../iterateJsdoc.js';
+
+/**
+ * @param {string} str
+ * @param {string[]} excludeTags
+ * @returns {string}
+ */
+const maskExcludedContent = (str, excludeTags) => {
+  const regContent = new RegExp(`([ \\t]+\\*)[ \\t]@(?:${excludeTags.join('|')})(?=[ \\n])([\\w\\|\\W]*?\\n)(?=[ \\t]*\\*(?:[ \\t]*@\\w+\\s|\\/))`, 'gv');
+
+  return str.replace(regContent, (_match, margin, code) => {
+    return (margin + '\n').repeat(code.match(/\n/gv).length);
+  });
+};
+
+/**
+ * @param {string} str
+ * @returns {string}
+ */
+const maskCodeBlocks = (str) => {
+  const regContent = /([ \t]+\*)[ \t]```[^\n]*?([\w\|\W]*?\n)(?=[ \t]*\*(?:[ \t]*(?:```|@\w+\s)|\/))/gv;
+
+  return str.replaceAll(regContent, (_match, margin, code) => {
+    return (margin + '\n').repeat(code.match(/\n/gv).length);
+  });
+};
+
+/**
+ * @param {string[]} lines
+ * @param {number} lineIndex
+ * @returns {number}
+ */
+const getLineNumber = (lines, lineIndex) => {
+  const precedingText = lines.slice(0, lineIndex).join('\n');
+  const lineBreaks = precedingText.match(/\n/gv) || [];
+  return lineBreaks.length + 1;
+};
+
+export default iterateJsdoc(({
+  context,
+  jsdocNode,
+  report,
+  sourceCode,
+}) => {
+  const options = context.options[0] || {};
+  const /** @type {{excludeTags: string[], allowIndentedSections: boolean}} */ {
+    allowIndentedSections = false,
+    excludeTags = [
+      'example',
+    ],
+  } = options;
+
+  const textWithoutCodeBlocks = maskCodeBlocks(sourceCode.getText(jsdocNode));
+  const text = excludeTags.length ? maskExcludedContent(textWithoutCodeBlocks, excludeTags) : textWithoutCodeBlocks;
+
+  if (allowIndentedSections) {
+    // When allowIndentedSections is enabled, only check for indentation on tag lines
+    // and the very first line of the main description
+    const lines = text.split('\n');
+    let hasSeenContent = false;
+    let currentSectionIndent = null;
+
+    for (const [
+      lineIndex,
+      line,
+    ] of lines.entries()) {
+      // Check for indentation (two or more spaces after *)
+      const indentMatch = line.match(/^(?:\/?\**|[\t ]*)\*([\t ]{2,})/v);
+
+      if (indentMatch) {
+        // Check what comes after the indentation
+        const afterIndent = line.slice(indentMatch[0].length);
+        const indentAmount = indentMatch[1].length;
+
+        // If this is a tag line with indentation, always report
+        if (/^@\w+/v.test(afterIndent)) {
+          report('There must be no indentation.', null, {
+            line: getLineNumber(lines, lineIndex),
+          });
+          return;
+        }
+
+        // If we haven't seen any content yet (main description first line) and there's content, report
+        if (!hasSeenContent && afterIndent.trim().length > 0) {
+          report('There must be no indentation.', null, {
+            line: getLineNumber(lines, lineIndex),
+          });
+          return;
+        }
+
+        // For continuation lines, check consistency
+        if (hasSeenContent && afterIndent.trim().length > 0) {
+          if (currentSectionIndent === null) {
+            // First indented line in this section, set the indent level
+            currentSectionIndent = indentAmount;
+          } else if (indentAmount < currentSectionIndent) {
+            // Indentation is less than the established level (inconsistent)
+            report('There must be no indentation.', null, {
+              line: getLineNumber(lines, lineIndex),
+            });
+            return;
+          }
+        }
+      } else if (/^\s*\*\s+\S/v.test(line)) {
+        // No indentation on this line, reset section indent tracking
+        // (unless it's just whitespace or a closing comment)
+        currentSectionIndent = null;
+      }
+
+      // Track if we've seen any content (non-whitespace after the *)
+      if (/^\s*\*\s+\S/v.test(line)) {
+        hasSeenContent = true;
+      }
+
+      // Reset section indent when we encounter a tag
+      if (/@\w+/v.test(line)) {
+        currentSectionIndent = null;
+      }
+    }
+  } else {
+    const reg = /^(?:\/?\**|[ \t]*)\*[ \t]{2}/gmv;
+    if (reg.test(text)) {
+      const lineBreaks = text.slice(0, reg.lastIndex).match(/\n/gv) || [];
+      report('There must be no indentation.', null, {
+        line: lineBreaks.length,
+      });
+    }
+  }
+}, {
+  iterateAllJsdocs: true,
+  meta: {
+    docs: {
+      description: 'Reports invalid padding inside JSDoc blocks.',
+      url: 'https://github.com/gajus/eslint-plugin-jsdoc/blob/main/docs/rules/check-indentation.md#repos-sticky-header',
+    },
+    schema: [
+      {
+        additionalProperties: false,
+        properties: {
+          allowIndentedSections: {
+            description: 'Allows indentation of nested sections on subsequent lines (like bullet lists)',
+            type: 'boolean',
+          },
+          excludeTags: {
+            description: `Array of tags (e.g., \`['example', 'description']\`) whose content will be
+"hidden" from the \`check-indentation\` rule. Defaults to \`['example']\`.
+
+By default, the whole JSDoc block will be checked for invalid padding.
+That would include \`@example\` blocks too, which can get in the way
+of adding full, readable examples of code without ending up with multiple
+linting issues.
+
+When disabled (by passing \`excludeTags: []\` option), the following code *will*
+report a padding issue:
+
+\`\`\`js
+/**
+ * @example
+ * anArray.filter((a) => {
+ *   return a.b;
+ * });
+ */
+\`\`\``,
+            items: {
+              pattern: '^\\S+$',
+              type: 'string',
+            },
+            type: 'array',
+          },
+        },
+        type: 'object',
+      },
+    ],
+    type: 'layout',
+  },
+});