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nnnick/Chart.js

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src/plugins/plugin.decimation.js

Summary

Maintainability
C
1 day
Test Coverage

Function minMaxDecimation has a Cognitive Complexity of 23 (exceeds 7 allowed). Consider refactoring.
Open

function minMaxDecimation(data, start, count, availableWidth) {
  let avgX = 0;
  let countX = 0;
  let i, point, x, y, prevX, minIndex, maxIndex, startIndex, minY, maxY;
  const decimated = [];
Severity: Minor
Found in src/plugins/plugin.decimation.js - About 2 hrs 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 beforeElementsUpdate has 55 lines of code (exceeds 25 allowed). Consider refactoring.
Open

  beforeElementsUpdate: (chart, args, options) => {
    if (!options.enabled) {
      // The decimation plugin may have been previously enabled. Need to remove old `dataset._data` handlers
      cleanDecimatedData(chart);
      return;
Severity: Major
Found in src/plugins/plugin.decimation.js - About 2 hrs to fix

    Function minMaxDecimation has 51 lines of code (exceeds 25 allowed). Consider refactoring.
    Open

    function minMaxDecimation(data, start, count, availableWidth) {
  let avgX = 0;
  let countX = 0;
  let i, point, x, y, prevX, minIndex, maxIndex, startIndex, minY, maxY;
  const decimated = [];
    Severity: Major
    Found in src/plugins/plugin.decimation.js - About 2 hrs to fix

      Function lttbDecimation has 44 lines of code (exceeds 25 allowed). Consider refactoring.
      Open

      function lttbDecimation(data, start, count, availableWidth, options) {
  /**
   * Implementation of the Largest Triangle Three Buckets algorithm.
   *
   * This implementation is based on the original implementation by Sveinn Steinarsson
      Severity: Minor
      Found in src/plugins/plugin.decimation.js - About 1 hr to fix

        Function lttbDecimation has a Cognitive Complexity of 10 (exceeds 7 allowed). Consider refactoring.
        Open

        function lttbDecimation(data, start, count, availableWidth, options) {
  /**
   * Implementation of the Largest Triangle Three Buckets algorithm.
   *
   * This implementation is based on the original implementation by Sveinn Steinarsson
        Severity: Minor
        Found in src/plugins/plugin.decimation.js - About 45 mins 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

        Avoid too many return statements within this function.
        Open

                return;
        Severity: Major
        Found in src/plugins/plugin.decimation.js - About 30 mins to fix

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