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|
package main
import (
"fmt"
"html/template"
"math"
"net/http"
"os"
"strconv"
"github.com/joho/godotenv"
"github.com/meilisearch/meilisearch-go"
)
type SearchQuery struct {
Query string
MaxResults int64
Offset int64
}
type SearchResponse struct {
Success bool
SearchResults []interface{}
NumResults int
TotalResults int64
MoreResults bool
OriginalQuery SearchQuery
Offset int64
LastOffset int64
NumPages int
}
func pageCount(total int, perPage int) int {
return int(math.Ceil(float64(total) / float64(perPage)))
}
func main() {
err := godotenv.Load(".env")
if err != nil {
fmt.Println("Error loading .env file")
os.Exit(1)
}
meili_host, ok := os.LookupEnv("MEILI_HOST")
if !ok {
fmt.Println("Error loading MEILI_HOST from .env file")
os.Exit(1)
}
client := meilisearch.NewClient(meilisearch.ClientConfig{
Host: meili_host,
})
index := client.Index("fda510k")
http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
t, _ := template.ParseFiles("search.gtpl")
t.Execute(w, nil)
})
funcMap := template.FuncMap{
"unescapeHTML": func(s string) template.HTML {
return template.HTML(s)
},
}
//searchResTemplate := template.Must(template.ParseFiles("results.gtpl"))
searchResTemplate := template.Must(template.New("results.gtpl").Funcs(funcMap).ParseFiles("results.gtpl"))
if err != nil {
fmt.Println("Error parsing template")
os.Exit(1)
}
http.HandleFunc("/search", func(w http.ResponseWriter, r *http.Request) {
r.ParseForm()
fmt.Println(r.Form)
if r.Form["query"] != nil || r.FormValue("query") != "" {
fmt.Println("query:", r.Form["query"])
var myOffset int64
if r.Form["offset"] != nil {
offset, _ := strconv.ParseInt(r.FormValue("offset"), 10, 64)
myOffset = offset
if offset < 0 {
myOffset = 0
}
} else {
offset := int64(0)
myOffset = offset
}
query := SearchQuery{
Query: r.FormValue("query"),
MaxResults: 100,
Offset: myOffset,
}
res, err := index.Search(query.Query, &meilisearch.SearchRequest{
Limit: query.MaxResults,
Offset: query.Offset,
AttributesToRetrieve: []string{
"title",
"applicant",
"submission_date",
"predicates",
"id",
},
AttributesToCrop: []string{"full_text"},
AttributesToHighlight: []string{"full_text"},
HighlightPreTag: "<mark>",
HighlightPostTag: "</mark>",
})
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
numPages := pageCount(int(res.EstimatedTotalHits), int(query.MaxResults))
searchResTemplate.Execute(w, SearchResponse{
Success: true,
SearchResults: res.Hits,
NumResults: len(res.Hits) + int(query.Offset),
TotalResults: res.EstimatedTotalHits,
MoreResults: res.EstimatedTotalHits > query.MaxResults,
OriginalQuery: query,
Offset: query.Offset + query.MaxResults,
LastOffset: query.Offset - query.MaxResults,
NumPages: numPages,
})
} else {
fmt.Println("query is empty")
}
})
fmt.Println("Listening on port 8080")
http.ListenAndServe(":8080", nil)
}
|
