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/
pageset.go
206 lines (181 loc) · 4.07 KB
/
pageset.go
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package penny
import (
"bytes"
"fmt"
"github.com/redneckbeard/gadget/sitemap"
"io/ioutil"
"launchpad.net/goyaml"
"os"
"path/filepath"
"sort"
"strings"
"text/tabwriter"
)
var PageSets = make(map[string]*PageSet)
type PageSlice []*Page
func (p PageSlice) Len() int { return len(p) }
func (p PageSlice) Swap(i, j int) { p[i], p[j] = p[j], p[i] }
type ByDate struct{ PageSlice }
func (s ByDate) Less(i, j int) bool {
return s.PageSlice[j].Date.After(s.PageSlice[i].Date)
}
type ByWordCount struct{ PageSlice }
func (s ByWordCount) Less(i, j int) bool {
return s.PageSlice[j].WordCount > s.PageSlice[i].WordCount
}
func (p PageSlice) Display(width int) (final []string) {
buf := new(bytes.Buffer)
rightCols := tabwriter.NewWriter(buf, 5, 1, 1, ' ', tabwriter.AlignRight|tabwriter.Debug)
for _, page := range p {
fmt.Fprintf(rightCols, "%d \t %s\n", page.WordCount, page.Date.Format("02 Jan 06"))
}
rightCols.Flush()
line, err := buf.ReadString('\n')
i := 0
rightColsWidth := len(line)
widthForTitle := width - rightColsWidth - 1
for err == nil {
title := p[i].Title
if len(title) > widthForTitle {
title = title[:widthForTitle-3] + "..."
}
spaces := strings.Repeat(" ", width-len(title)-rightColsWidth)
final = append(final, title+spaces+line)
line, err = buf.ReadString('\n')
i++
}
return
}
func (p PageSlice) Link() {
length := len(p)
for i := range p {
page := p[i]
if i > 0 {
page.Previous = p[i-1]
}
if i < length-1 {
page.Next = p[i+1]
}
}
}
func (p PageSlice) MakeSeries() {
seriesSlice := []*series{}
for _, page := range p {
if title := page.FrontMatter.Series; title != "" {
titleSeries := &series{Title: title}
needsAppend := true
for _, s := range seriesSlice {
if s.Title == title {
titleSeries = s
needsAppend = false
}
}
if needsAppend {
seriesSlice = append(seriesSlice, titleSeries)
}
titleSeries.PageSlice = append(titleSeries.PageSlice, page)
page.Series = titleSeries
sort.Sort(ByDate{titleSeries.PageSlice})
}
}
}
type series struct {
PageSlice
Title string
}
func (s *series) Position(p *Page) int {
for i, page := range s.PageSlice {
if p == page {
return i + 1
}
}
return -1
}
func (s *series) Previous(p *Page) *Page {
for i, page := range s.PageSlice {
if p == page && i > 0 {
return s.PageSlice[i-1]
}
}
return nil
}
func (s *series) Next(p *Page) *Page {
for i, page := range s.PageSlice {
if p == page && i < len(s.PageSlice)-1 {
return s.PageSlice[i+1]
}
}
return nil
}
func (s *series) Len() int {
return len(s.PageSlice)
}
type PageSet struct {
pages map[string]*Page `yaml:"-"`
Path string `yaml:"-"`
Sitemap bool `yaml:"sitemap"`
}
func (p *PageSet) Get(slug string) (*Page, bool) {
page, found := p.pages[slug]
return page, found
}
func (p *PageSet) Add(slug string, page *Page) {
p.pages[slug] = page
}
func (ps *PageSet) AsSlice() PageSlice {
p := PageSlice{}
for _, v := range ps.pages {
p = append(p, v)
}
return p
}
func (ps *PageSet) Link() {
p := ps.AsSlice()
sort.Sort(ByDate{p})
p.Link()
p.MakeSeries()
}
func (ps *PageSet) AddSitemap() {
var urls []*sitemap.Url
for slug, p := range ps.pages {
if p.IsVisible() {
urls = append(urls, &sitemap.Url{
Loc: filepath.Join(ps.Path, slug),
LastMod: p.Date,
})
}
}
sitemap.Add(ps.Path, urls...)
}
func (ps *PageSet) Configure(path string) {
if raw, err := ioutil.ReadFile(path); err == nil {
if err := goyaml.Unmarshal(raw, ps); err != nil {
panic(raw)
}
}
}
func NewPageSet(dir string) *PageSet {
p := &PageSet{Sitemap: true}
p.Path = filepath.Base(dir)
p.pages = make(map[string]*Page)
filepath.Walk(dir, func(path string, info os.FileInfo, err error) error {
if err == nil {
if !info.IsDir() {
switch {
case filepath.Ext(path) == ".md":
if page, err := Parse(path, false); err != nil {
panic(err)
} else {
p.Add(page.FrontMatter.Slug, page)
}
case filepath.Base(path) == "penny.yml":
p.Configure(path)
}
}
}
return err
})
p.Link()
PageSets[dir] = p
return p
}