_appendValue()

in backend/encoding.js [579:654]

• 76 lines of code
• 20 McCabe index (conditional complexity)

  _appendValue(value, repetitions = 1) {
    if (repetitions <= 0) return
    if (this.state === 'empty') {
      this.state = (value === null ? 'nulls' : (repetitions === 1 ? 'loneValue' : 'repetition'))
      this.lastValue = value
      this.count = repetitions
    } else if (this.state === 'loneValue') {
      if (value === null) {
        this.flush()
        this.state = 'nulls'
        this.count = repetitions
      } else if (value === this.lastValue) {
        this.state = 'repetition'
        this.count = 1 + repetitions
      } else if (repetitions > 1) {
        this.flush()
        this.state = 'repetition'
        this.count = repetitions
        this.lastValue = value
      } else {
        this.state = 'literal'
        this.literal = [this.lastValue]
        this.lastValue = value
      }
    } else if (this.state === 'repetition') {
      if (value === null) {
        this.flush()
        this.state = 'nulls'
        this.count = repetitions
      } else if (value === this.lastValue) {
        this.count += repetitions
      } else if (repetitions > 1) {
        this.flush()
        this.state = 'repetition'
        this.count = repetitions
        this.lastValue = value
      } else {
        this.flush()
        this.state = 'loneValue'
        this.lastValue = value
      }
    } else if (this.state === 'literal') {
      if (value === null) {
        this.literal.push(this.lastValue)
        this.flush()
        this.state = 'nulls'
        this.count = repetitions
      } else if (value === this.lastValue) {
        this.flush()
        this.state = 'repetition'
        this.count = 1 + repetitions
      } else if (repetitions > 1) {
        this.literal.push(this.lastValue)
        this.flush()
        this.state = 'repetition'
        this.count = repetitions
        this.lastValue = value
      } else {
        this.literal.push(this.lastValue)
        this.lastValue = value
      }
    } else if (this.state === 'nulls') {
      if (value === null) {
        this.count += repetitions
      } else if (repetitions > 1) {
        this.flush()
        this.state = 'repetition'
        this.count = repetitions
        this.lastValue = value
      } else {
        this.flush()
        this.state = 'loneValue'
        this.lastValue = value
      }
    }
  }