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package main
import (
"encoding/json"
"fmt"
"io"
"log"
"net/http"
"net/url"
"strconv"
"strings"
"time"
)
var wikiArticleClient = &http.Client{Timeout: 60 * time.Second}
// wikiArticleEntry holds extracted fields from a wiki article API response.
type wikiArticleEntry struct {
Description string
Year int
PosterURL string
Synopsis string
License string
LicenseURL string
NumAccolades int
}
func (a *App) queryWikiArticle(name string) (wikiArticleEntry, int, error) {
// Build URL — name is decoded from DB, encode it for the request
reqURL := fmt.Sprintf("%s?username=%s&name=%s",
a.Config.WikiServer, url.QueryEscape(a.Config.WikiUsername), url.PathEscape(name))
var resp *http.Response
var err error
for attempt := 0; attempt < 5; attempt++ {
if attempt > 0 {
backoff := 1 << attempt
log.Printf("retry %d/%d for %s after %ds backoff", attempt, 4, name, backoff)
time.Sleep(time.Duration(backoff) * time.Second)
}
resp, err = wikiArticleClient.Get(reqURL)
if err != nil {
continue
}
if resp.StatusCode == http.StatusTooManyRequests {
resp.Body.Close()
continue
}
if resp.StatusCode != http.StatusOK {
body, _ := io.ReadAll(io.LimitReader(resp.Body, 2048))
resp.Body.Close()
return wikiArticleEntry{}, resp.StatusCode, fmt.Errorf("HTTP %d: %s", resp.StatusCode, body)
}
break
}
if err != nil {
return wikiArticleEntry{}, 0, fmt.Errorf("http get: %w", err)
}
defer resp.Body.Close()
var articles []map[string]interface{}
if err := json.NewDecoder(resp.Body).Decode(&articles); err != nil {
return wikiArticleEntry{}, 200, fmt.Errorf("json decode: %w", err)
}
if len(articles) == 0 {
return wikiArticleEntry{}, 200, fmt.Errorf("no articles returned")
}
article := articles[0]
var entry wikiArticleEntry
// description
if desc, ok := article["description"]; ok {
entry.Description = fmt.Sprintf("%v", desc)
}
// synopsis from Plot section
entry.Synopsis = extractSynopsis(article)
// year, poster_url from infobox
entry.Year, entry.PosterURL = extractInfoboxData(article)
// license
if licList, ok := article["license"]; ok {
if arr, ok := licList.([]interface{}); ok && len(arr) > 0 {
if lic, ok := arr[0].(map[string]interface{}); ok {
entry.License = fmt.Sprintf("%v", lic["name"])
entry.LicenseURL = fmt.Sprintf("%v", lic["url"])
}
}
}
// num_accolades from tables
entry.NumAccolades = extractAccolades(article)
return entry, 200, nil
}
func extractSynopsis(article map[string]interface{}) string {
sections, ok := article["sections"].([]interface{})
if !ok {
return ""
}
for _, sec := range sections {
s, ok := sec.(map[string]interface{})
if !ok || s["name"] != "Plot" {
continue
}
var parts []string
if pp, ok := s["has_parts"].([]interface{}); ok {
for _, p := range pp {
if pp2, ok := p.(map[string]interface{}); ok && pp2["type"] == "paragraph" {
parts = append(parts, fmt.Sprintf("%v", pp2["value"]))
}
}
}
if len(parts) > 0 {
return strings.Join(parts, " ")
}
return ""
}
return ""
}
func extractInfoboxData(article map[string]interface{}) (year int, posterURL string) {
infoboxes, ok := article["infoboxes"].([]interface{})
if !ok || len(infoboxes) == 0 {
return
}
ib, ok := infoboxes[0].(map[string]interface{})
if !ok {
return
}
parts, ok := ib["has_parts"].([]interface{})
if !ok || len(parts) == 0 {
return
}
section, ok := parts[0].(map[string]interface{})
if !ok {
return
}
subParts, _ := section["has_parts"].([]interface{})
for _, p := range subParts {
fp, ok := p.(map[string]interface{})
if !ok {
continue
}
// poster from first image
if fp["type"] == "image" && posterURL == "" {
if imgs, ok := fp["images"].([]interface{}); ok && len(imgs) > 0 {
if img, ok := imgs[0].(map[string]interface{}); ok {
if cu, ok := img["content_url"]; ok {
posterURL = fmt.Sprintf("%v", cu)
}
}
}
}
// year from Release dates
if fp["name"] == "Release dates" && year == 0 {
if items, ok := fp["has_parts"].([]interface{}); ok && len(items) > 0 {
if item, ok := items[0].(map[string]interface{}); ok {
val := fmt.Sprintf("%v", item["value"])
year = extractYear(val)
}
}
}
}
return
}
func extractYear(s string) int {
// Look for 4-digit year pattern like "1972" or "(1972-03-14)"
for i := 0; i+3 < len(s); i++ {
if s[i] == '(' {
i++ // skip paren
}
if i+4 <= len(s) && s[i] >= '1' && s[i] <= '2' {
if y, err := strconv.Atoi(s[i : i+4]); err == nil && y >= 1800 && y <= 2100 {
return y
}
}
}
return 0
}
func extractAccolades(article map[string]interface{}) int {
tables, ok := article["tables"].([]interface{})
if !ok {
return 0
}
total := 0
for _, t := range tables {
tab, ok := t.(map[string]interface{})
if !ok {
continue
}
rows, _ := tab["rows"].([]interface{})
total += len(rows)
}
return total
}
|
