evalphobia/go-jp-text-ripper

package ripper

import (
    "fmt"
)

const defaultPrefix = "op_"

// RipConfig contains options for 'rip' command.
type RipConfig struct {
    CommonConfig

    // columns to add double-quotes
    Quotes []string
    // replace the target column or not
    ReplaceText bool

    DropEmpty bool

    // use ranking from the top N as stopword
    StopWordTopNumber int
    // use ranking from the top by percent as stopword
    StopWordTopPercent float64 // 0.0~1.0
    // use ranking from the last N as stopword
    StopWordLastNumber int
    // use ranking from the last by percent as stopword
    StopWordLastPercent float64 // 0.0~1.0
    // use counting as one word if the same word exists in a line
    UseStopWordUnique bool
}

// Init initializes config.
func (c *RipConfig) Init() error {
    if c.Prefix == "" {
        c.Prefix = defaultPrefix
    }
    return c.CommonConfig.Init()
}

// Validate validates config.
func (c RipConfig) Validate() error {
    if err := c.CommonConfig.Validate(); err != nil {
        return err
    }

    if c.Output == "" && !c.ShowResult && !c.Debug {
        return fmt.Errorf("no output file\nSet -output <output file path> (or set -show option)")
    }
    return nil
}

// UseRankingForStopWord uses word frequency ranking as a stopword.
func (c RipConfig) UseRankingForStopWord() bool {
    switch {
    case c.StopWordTopNumber > 0,
        c.StopWordTopPercent > 0,
        c.StopWordLastNumber > 0,
        c.StopWordLastPercent > 0:
        return true
    }
    return false
}