source: code/trunk/zs_ext.go@ 26

package main

import (
        "bytes"
        "os"
        "strconv"
        "strings"
        "time"

        "github.com/drhodes/golorem"
        "github.com/google/gxui/math"
        "github.com/jaytaylor/html2text"
)

// zs var <filename> -- returns list of variables and their values
// zs var <filename> <var...> -- returns list of variable values
func Var(args []string) string {
        if len(args) == 0 {
                return "var: filename expected"
        } else {
                s := ""
                if vars, _, err := md(args[0], globals()); err != nil {
                        return "var: " + err.Error()
                } else {
                        if len(args) > 1 {
                                for _, a := range args[1:] {
                                        s = s + vars[a] + "\n"
                                }
                        } else {
                                for k, v := range vars {
                                        s = s + k + ":" + v + "\n"
                                }
                        }
                }
                return strings.TrimSpace(s)
        }
}

// zs lorem <n> -- returns <n> random lorem ipsum sentences
func Lorem(args []string) string {
        if len(args) > 1 {
                return "lorem: invalid usage"
        }
        if len(args) == 0 {
                return lorem.Paragraph(5, 5)
        }
        if n, err := strconv.Atoi(args[0]); err == nil {
                return lorem.Paragraph(n, n)
        } else {
                return "lorem: " + err.Error()
        }
}

// zs datefmt <fmt> <date> -- returns formatted date from unix time
func DateFmt(args []string) string {
        if len(args) == 0 || len(args) > 2 {
                return "datefmt: invalid usage"
        }
        if n, err := strconv.ParseInt(args[1], 10, 64); err == nil {
                return time.Unix(n, 0).Format(args[0])
        } else {
                return "datefmt: " + err.Error()
        }
}

// zs dateparse <fmt> <date> -- returns unix time from the formatted date
func DateParse(args []string) string {
        if len(args) == 0 || len(args) > 2 {
                return "dateparse: invalid usage"
        }
        if d, err := time.Parse(args[0], args[1]); err != nil {
                return "dateparse: " + err.Error()
        } else {
                return strconv.FormatInt(d.Unix(), 10)
        }
}

// zs wc <file> -- returns word count in the file (markdown, html or amber)
func WordCount(args []string) int {
        if os.Getenv("ZS_RECURSION") != "" {
                return 0
        }
        if len(args) != 1 {
                return 0
        }
        os.Setenv("ZS_RECURSION", "1")
        out := &bytes.Buffer{}
        if err := build(args[0], out, builtins(), globals()); err != nil {
                return 0
        }
        if s, err := html2text.FromString(string(out.Bytes())); err != nil {
                return 0
        } else {
                return len(strings.Fields(s))
        }
}

// zs timetoread <file> -- returns number of minutes required to read the text
func TimeToRead(args []string) int {
        wc := WordCount(args)
        return int(math.Round(float64(wc) / float64(200)))
}