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archive/ArchiveState.go

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package archive
import (
"fmt"
"html/template"
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"io/ioutil"
"math"
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"net/http"
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"strings"
)
const (
pageNotSet int = -1
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)
type ArchiveState struct {
svr *ArchiveServer
log *LogSource
logBestSlug string
query string
queryIsRegex bool
ym YearMonth
page int
highestPage int
}
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func NewArchiveState(svr *ArchiveServer) *ArchiveState {
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return &ArchiveState{
svr: svr,
page: pageNotSet,
}
}
func (this *ArchiveState) selectSource(log *LogSource, slug string) {
this.log = log
this.logBestSlug = slug
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}
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// renderView renders a single page of log entries.
// - Mandatory: log, ym
// - Optional: page
func (this *ArchiveState) renderView(w http.ResponseWriter) {
if this.log == nil {
this.renderError(w, "Invalid log source selected")
return
}
fname, err := this.svr.LogFile(this.log, this.ym)
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if err != nil {
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this.renderError(w, err.Error())
return
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}
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fc, err := ioutil.ReadFile(fname)
if err != nil {
this.renderError(w, err.Error())
return
}
lines := strings.Split(string(fc), "\n")
this.highestPage = int(math.Ceil(float64(len(lines))/float64(this.svr.cfg.LinesPerPage))) - 1
if this.page == pageNotSet || this.page > this.highestPage {
this.page = this.highestPage
}
if this.page < 0 {
this.page = 0
}
startLine := this.svr.cfg.LinesPerPage * this.page
endLine := this.svr.cfg.LinesPerPage * (this.page + 1)
if endLine > len(lines) {
endLine = len(lines)
}
output := ""
for i := startLine; i < endLine; i += 1 {
output += template.HTMLEscapeString(lines[i]) + "<br>\n"
}
this.renderTemplate(w, []byte(output))
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}
func (this *ArchiveState) renderError(w http.ResponseWriter, msg string) {
this.renderTemplate(w, []byte(template.HTMLEscapeString(msg)))
}
func (this *ArchiveState) renderTemplate(w http.ResponseWriter, body []byte) {
this.renderTemplateHead(w)
w.Write(body)
this.renderTemplateFoot(w)
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}
func (this *ArchiveState) renderTemplateHead(w http.ResponseWriter) {
w.Header().Set(`Content-Type`, `text/html; charset=UTF-8`)
w.Header().Set(`X-UA-Compatible`, `IE=Edge`)
w.WriteHeader(200)
title := `Archives`
if this.log != nil {
title = this.log.Description + ` Archives`
}
showPageURLs := (this.log != nil && len(this.query) == 0)
w.Write([]byte(`<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
<title>` + template.HTMLEscapeString(title) + `</title>
<link rel="stylesheet" type="text/css" href="/style.css">
</head>
<body>
<div class="layout-top nav">
<div id="tr1" style="display:none;"></div>
<div id="tr2" style="display:none;"></div>
<div class="ddmenu" id="spm" style="display:none;">
<a href="/">Latest</a>
<a onclick="fontSize(1);">Font increase</a>
<a onclick="fontSize(-1);">Font decrease</a>
<a href="/download" onclick="return confirm('Are you sure you want to download a backup?');">Download backup</a>
</div>
<a onclick="toggleMenu();"><div id="logo" class="layout-pushdown"></div></a>
<span class="area-nav">
<form method="GET" id="frmHub">
<select name="h" id="selHub">
`))
for i, h := range this.svr.cfg.Logs {
slug, _ := this.svr.bestSlugFor(&this.svr.cfg.Logs[i])
current := (this.log == &this.svr.cfg.Logs[i])
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w.Write([]byte(`<option value="` + template.HTMLEscapeString(slug) + `" ` + attr(current, "selected") + `>` + template.HTMLEscapeString(h.Description) + `</option>`))
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}
w.Write([]byte(`
</select>
</form>
`))
if showPageURLs {
w.Write([]byte(`
<form method="GET">
<input type="hidden" name="h" value="` + template.HTMLEscapeString(this.logBestSlug) + `">
<select id="seldate" onchange="setYM(this);">
`))
// Generate month dropdown options
lastY := -1
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limit := this.log.LatestDate().Next() // one off the end
for ympair := this.log.EarliestDate(); !ympair.Equals(limit); ympair = ympair.Next() {
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if ympair.Year != lastY {
if lastY != -1 {
w.Write([]byte(`</optgroup>`))
}
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w.Write([]byte(`<optgroup label="` + fmt.Sprintf("%d", ympair.Year) + `">`))
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lastY = ympair.Year
}
w.Write([]byte(fmt.Sprintf(`<option value="%d-%d" %s>%s</option>`, ympair.Year, ympair.Month, attr(ympair.Equals(this.ym), "selected"), template.HTMLEscapeString(ympair.Month.String()))))
}
//
pageBase := fmt.Sprintf(`/%s/%d/%d`, this.logBestSlug, this.ym.Year, this.ym.Month)
previousPage := this.page - 1
if previousPage < 0 {
previousPage = 0
}
nextPage := this.page + 1
if nextPage > this.highestPage {
nextPage = this.highestPage
}
w.Write([]byte(`
</optgroup>
</select>
<input type="hidden" name="y" id="f_y" value="">
<input type="hidden" name="m" id="f_m" value="">
<input type="hidden" name="p" value="0" >
</form>
<div class="mini-separator layout-pushdown"></div>
<a class="btn" href="` + pageBase + `/page-0">&laquo;</a><a
class="btn" id="pgprev" href="` + pageBase + `/page-` + fmt.Sprintf("%d", previousPage) + `">&lsaquo;</a>
` + fmt.Sprintf("%d", this.page) + `
<a class="btn" id="pgnext" href="` + pageBase + `/page-` + fmt.Sprintf("%d", nextPage) + `">&rsaquo;</a><a
class="btn" href="` + pageBase + `">&raquo;</a>
`))
}
w.Write([]byte(`
<div class="pad"></div>
</span>
<span class="area-search">
<form method="GET">
<input type="hidden" name="h" value="` + template.HTMLEscapeString(this.logBestSlug) + `">
<input type="text" id="searchbox" name="q" value="` + template.HTMLEscapeString(this.query) + `" placeholder="Search...">
<input type="submit" value="&raquo;">
<input type="checkbox" class="layout-pushdown" name="rx" value="1" title="PCRE Regular Expression" ` + attr(this.queryIsRegex, "checked") + `>
</form>
</span>
</div>
<div class="layout-body" id="chatarea">
`))
// Header ends
}
func (this *ArchiveState) renderTemplateFoot(w http.ResponseWriter) {
w.Write([]byte(`
</div>
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<script type="text/javascript" src="/archive.js?nonce=` + fmt.Sprintf("%d", this.svr.startup.Unix()) + `"></script>
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</body>
</html>
`))
}