forked from mirror/oddmu
99 lines
2.8 KiB
Go
99 lines
2.8 KiB
Go
package main
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import (
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"regexp"
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"time"
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)
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func (p *Page) notify() error {
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org := ""
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c, err := loadPage("changes")
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p.handleTitle(false)
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if p.Title == "" {
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p.Title = p.Name
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}
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esc := nameEscape(p.Name)
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d := time.Now().Format(time.DateOnly)
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if err != nil {
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// create a new page
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c = &Page{Name: "changes", Body: []byte("# Changes\n\n## " + d + "\n* [" + p.Title + "](" + esc + ")\n")}
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} else {
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org = string(c.Body)
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// remove the old match, if one exists
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re := regexp.MustCompile(`(?m)^\* \[[^\]]+\]\(` + esc + `\)\n`)
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loc := re.FindIndex(c.Body)
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if loc != nil {
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r := c.Body[:loc[0]]
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if loc[1] < len(c.Body) {
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r = append(r, c.Body[loc[1]:]...)
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}
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c.Body = r
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if loc[0] >= 14 && len(c.Body) >= loc[0]+14 {
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// remove the preceding date if there are now two dates following each other
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re := regexp.MustCompile(`(?m)^## (\d\d\d\d-\d\d-\d\d)\n## (\d\d\d\d-\d\d-\d\d)\n`)
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if re.Match(c.Body[loc[0]-14 : loc[0]+14]) {
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c.Body = append(c.Body[0 : loc[0]-14], c.Body[loc[0] : ]...)
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}
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} else if len(c.Body) == loc[0] {
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// remove a trailing date
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re := regexp.MustCompile(`## (\d\d\d\d-\d\d-\d\d)\n`)
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if re.Match(c.Body[loc[0]-14 : loc[0]]) {
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c.Body = c.Body[0 : loc[0]-14]
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}
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}
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}
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// locate the beginning of the list to insert the line
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re = regexp.MustCompile(`(?m)^\* \[[^\]]+\]\([^\)]+\)\n`)
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loc = re.FindIndex(c.Body)
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if loc == nil {
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// if no list was found, use the end of the page
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loc = []int{len(c.Body)}
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}
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// start with new page content
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r := []byte("")
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// check if there is a date right before the insertion point
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addDate := true
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if loc[0] >= 14 {
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re := regexp.MustCompile(`(?m)^## (\d\d\d\d-\d\d-\d\d)\n`)
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m := re.Find(c.Body[loc[0]-14 : loc[0]])
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if m == nil {
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// not a date: insert date, don't move insertion point
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} else if string(c.Body[loc[0]-11 : loc[0]-1]) == d {
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// if the date is our date, don't add it, don't move insertion point
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addDate = false
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} else {
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// if the date is not out date, move the insertion point
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loc[0] -= 14
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}
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}
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// append up to the insertion point
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r = append(r, c.Body[:loc[0]]...)
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// append date, if necessary
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if addDate {
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// ensure paragraph break
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if len(r) > 0 && r[len(r)-1] != '\n' {
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r = append(r, '\n')
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}
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if len(r) > 1 && r[len(r)-2] != '\n' {
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r = append(r, '\n')
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}
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r = append(r, []byte("## ")...)
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r = append(r, []byte(d)...)
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r = append(r, '\n')
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}
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// append link
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r = append(r, []byte("* ["+p.Title+"]("+esc+")\n")...)
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// if we just added a date, add an empty line after the single-element list
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if len(c.Body) > loc[0] && c.Body[loc[0]] != '*' {
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r = append(r, '\n')
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}
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// append the rest
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r = append(r, c.Body[loc[0]:]...)
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c.Body = r
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}
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if string(c.Body) != org {
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return c.save()
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}
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return nil
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}
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