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trantor/search.go

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package main
import (
"labix.org/v2/mgo/bson"
"net/http"
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"strconv"
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"strings"
)
func buildQuery(q string) bson.M {
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var reg []bson.RegEx
query := bson.M{"active": true}
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words := strings.Split(q, " ")
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for _, w := range words {
tag := strings.SplitN(w, ":", 2)
if len(tag) > 1 {
query[tag[0]] = bson.RegEx{tag[1], "i"}
} else {
reg = append(reg, bson.RegEx{w, "i"})
}
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}
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if len(reg) > 0 {
query["keywords"] = bson.M{"$all": reg}
}
return query
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}
type searchData struct {
S Status
Found int
Books []Book
ItemsPage int
Page int
Next string
Prev string
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}
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func searchHandler(w http.ResponseWriter, r *http.Request, sess *Session) {
err := r.ParseForm()
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
req := strings.Join(r.Form["q"], " ")
page := 0
if len(r.Form["p"]) != 0 {
page, err = strconv.Atoi(r.Form["p"][0])
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if err != nil {
page = 0
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}
}
items_page := itemsPage(r)
res, num, _ := db.GetBooks(buildQuery(req), items_page, page*items_page)
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var data searchData
data.S = GetStatus(w, r)
data.S.Search = req
data.Books = res
data.ItemsPage = items_page
data.Found = num
data.Page = page + 1
if num > (page+1)*items_page {
data.Next = "/search/?q=" + req + "&p=" + strconv.Itoa(page+1) + "&num=" + strconv.Itoa(items_page)
}
if page > 0 {
data.Prev = "/search/?q=" + req + "&p=" + strconv.Itoa(page-1) + "&num=" + strconv.Itoa(items_page)
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}
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format := r.Form["fmt"]
if (len(format) > 0) && (format[0] == "rss") {
loadTxtTemplate(w, "search_rss.xml", data)
} else {
loadTemplate(w, "search", data)
}
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}
func itemsPage(r *http.Request) int {
if len(r.Form["num"]) > 0 {
items_page, err := strconv.Atoi(r.Form["num"][0])
if err == nil {
return items_page
}
}
return SEARCH_ITEMS_PAGE
}