128 lines
2.1 KiB
Go
128 lines
2.1 KiB
Go
package utils
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import (
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"math"
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"os"
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"path"
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"reflect"
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"regexp"
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"runtime"
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"strings"
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)
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// PageObject -
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type PageObject struct {
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Page int `json:"page" cc:"page"`
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Total int `json:"total" cc:"total"`
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Offset int `json:"offset" cc:"offset"`
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Limit int `json:"limit" cc:"limit"`
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}
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// CalcPage -
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func CalcPage(count, page, max int) (po PageObject) {
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if count < 0 {
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count = 0
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}
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if page < 1 {
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page = 1
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}
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if max < 1 {
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max = 1
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}
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total := int(math.Ceil(float64(count) / float64(max)))
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if total < 1 {
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total = 1
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}
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if page > total {
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page = total
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}
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offset := (page - 1) * max
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if offset > count {
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offset = count
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}
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limit := max
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po = PageObject{}
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po.Limit = limit
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po.Page = page
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po.Offset = offset
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po.Total = total
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return
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}
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// ToMap struct to map[string]interface{}
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func ToMap(ss interface{}) map[string]interface{} {
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t := reflect.ValueOf(ss)
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if t.Kind() == reflect.Ptr {
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t = t.Elem()
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}
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smap := make(map[string]interface{})
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mtag := regexp.MustCompile(`cc:\"(.+)\"`)
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for i := 0; i < t.NumField(); i++ {
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f := t.Field(i)
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tag := string(t.Type().Field(i).Tag)
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str := mtag.FindStringSubmatch(tag)
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name := t.Type().Field(i).Name
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if len(str) > 1 {
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name = str[1]
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}
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if name != "-" {
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smap[name] = f.Interface()
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}
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}
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return smap
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}
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// ParsePath - parse file path to absPath
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func ParsePath(dst string) string {
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wd, err := os.Getwd()
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if err != nil {
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wd = ""
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}
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if []rune(dst)[0] == '~' {
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home := UserHomeDir()
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if len(home) > 0 {
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dst = strings.Replace(dst, "~", home, -1)
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}
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}
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if path.IsAbs(dst) {
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dst = path.Clean(dst)
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return dst
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}
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str := path.Join(wd, dst)
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str = path.Clean(str)
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return str
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}
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// UserHomeDir - get user home directory
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func UserHomeDir() string {
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env := "HOME"
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if runtime.GOOS == "windows" {
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env = "USERPROFILE"
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} else if runtime.GOOS == "plan9" {
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env = "home"
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}
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return os.Getenv(env)
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}
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// CheckExists - check file exists
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func CheckExists(filePath string, allowDir bool) bool {
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filePath = ParsePath(filePath)
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stat, err := os.Stat(filePath)
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if err != nil && !os.IsExist(err) {
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return false
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}
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if !allowDir && stat.IsDir() {
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return false
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}
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return true
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}
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