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src/router/pathMatcher.js

Summary

Maintainability
C
7 hrs
Test Coverage

Function matchPattern has 43 lines of code (exceeds 25 allowed). Consider refactoring.
Open

function matchPattern(pattern, pathname) {
  // Make leading slashes consistent between pattern and pathname.
  if (pattern.charAt(0) !== '/') {
    pattern = `/${pattern}`
  }
Severity: Minor
Found in src/router/pathMatcher.js - About 1 hr to fix

    Function _compilePattern has 36 lines of code (exceeds 25 allowed). Consider refactoring.
    Open

    function _compilePattern(pattern) {
  let regexpSource = ''
  const paramNames = []
  const tokens = []
    Severity: Minor
    Found in src/router/pathMatcher.js - About 1 hr to fix

      Function matchPattern has a Cognitive Complexity of 12 (exceeds 5 allowed). Consider refactoring.
      Open

      function matchPattern(pattern, pathname) {
  // Make leading slashes consistent between pattern and pathname.
  if (pattern.charAt(0) !== '/') {
    pattern = `/${pattern}`
  }
      Severity: Minor
      Found in src/router/pathMatcher.js - About 1 hr to fix

      Cognitive Complexity

      Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

      A method's cognitive complexity is based on a few simple rules:

      • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
      • Code is considered more complex for each "break in the linear flow of the code"
      • Code is considered more complex when "flow breaking structures are nested"

      Further reading

      Function _compilePattern has a Cognitive Complexity of 10 (exceeds 5 allowed). Consider refactoring.
      Open

      function _compilePattern(pattern) {
  let regexpSource = ''
  const paramNames = []
  const tokens = []
      Severity: Minor
      Found in src/router/pathMatcher.js - About 1 hr to fix

      Cognitive Complexity

      Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

      A method's cognitive complexity is based on a few simple rules:

      • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
      • Code is considered more complex for each "break in the linear flow of the code"
      • Code is considered more complex when "flow breaking structures are nested"

      Further reading

      Similar blocks of code found in 2 locations. Consider refactoring.
      Open

          if (match.index !== lastIndex) {
      tokens.push(pattern.slice(lastIndex, match.index))
      regexpSource += escapeSource(pattern.slice(lastIndex, match.index))
    }
      Severity: Minor
      Found in src/router/pathMatcher.js and 1 other location - About 50 mins to fix
      src/router/pathMatcher.js on lines 54..57

      Duplicated Code

      Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

      Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

      When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

      Tuning

      This issue has a mass of 52.

      We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

      The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

      If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

      See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

      Refactorings

      Further Reading

      Similar blocks of code found in 2 locations. Consider refactoring.
      Open

        if (lastIndex !== pattern.length) {
    tokens.push(pattern.slice(lastIndex, pattern.length))
    regexpSource += escapeSource(pattern.slice(lastIndex, pattern.length))
  }
      Severity: Minor
      Found in src/router/pathMatcher.js and 1 other location - About 50 mins to fix
      src/router/pathMatcher.js on lines 29..32

      Duplicated Code

      Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

      Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

      When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

      Tuning

      This issue has a mass of 52.

      We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

      The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

      If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

      See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

      Refactorings

      Further Reading

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