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googleimages.go
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googleimages.go
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package main // import "github.com/james-bowman/talbot"
import (
"encoding/json"
"fmt"
"github.com/james-bowman/talbot/brain"
"io/ioutil"
"log"
"math/rand"
"net/http"
"net/url"
"regexp"
"time"
)
func init() {
imageRegex := "(?i)(image|img)( me)? (.*)"
animateRegex := "(?i)(animate)( me)? (.*)"
mustacheRegex := "(?i)(?:mo?u)?s?ta(?:s|c)h(?:e|ify)?(?: me)? (.*)"
brain.Register(brain.Action{
Regex: regexp.MustCompile(imageRegex),
Usage: "image me <search expression>",
Description: "Queries Google Images for _search expression_ and returns random result",
Answerer: func(message string) string {
return processQueryAndSearch(message, imageRegex, false)
},
})
brain.Register(brain.Action{
Regex: regexp.MustCompile(animateRegex),
Usage: "animate me <search expression>",
Description: "The sames as `image me` except requests an animated gif matching _search expression_",
Answerer: func(message string) string {
return processQueryAndSearch(message, animateRegex, true)
},
})
brain.Register(brain.Action{
Regex: regexp.MustCompile(mustacheRegex),
Usage: "mustache me <search expression or URL>",
Description: "Queries Google Images for _search expression_ and adds a mustache or simply mustachifies the image at _url_",
Answerer: func(message string) string {
mustachify := "http://mustachify.me/rand?src=%s"
reExpression, err := regexp.Compile(mustacheRegex)
if err != nil {
log.Printf("Error compiling Regex to obtain query expression: %s", err)
return ""
}
searchExpression := reExpression.FindStringSubmatch(message)
expr := searchExpression[1]
reURL, err := regexp.Compile(`(?i)^<(https?:\/\/.*)>`)
if err != nil {
log.Printf("Error compiling Regex to obtain URL: %s", err)
return ""
}
if reURL.MatchString(expr) {
return fmt.Sprintf(mustachify, url.QueryEscape(reURL.FindStringSubmatch(expr)[1]))
}
return fmt.Sprintf(mustachify, url.QueryEscape(imageSearch(expr, false, true)))
},
})
}
func processQueryAndSearch(message string, regex string, animated bool) string {
reExpression, err := regexp.Compile(regex)
if err != nil {
log.Printf("Error compiling Regex to obtain query expression: %s", err)
return ""
}
searchExpression := reExpression.FindStringSubmatch(message)
if len(searchExpression) > 0 {
return imageSearch(searchExpression[3], animated, false)
}
return ""
}
func imageSearch(expr string, animated bool, faces bool) string {
googleURL, err := url.Parse("http://ajax.googleapis.com/ajax/services/search/images")
if err != nil {
log.Printf("Error parsing Google Images URL: %s", err)
return ""
}
q := googleURL.Query()
q.Set("v", "1.0")
q.Set("rsz", "8")
q.Set("safe", "active")
q.Set("q", expr)
if animated {
q.Set("imgtype", "animated")
}
if faces {
q.Set("imgtype", "face")
}
googleURL.RawQuery = q.Encode()
resp, err := http.Get(googleURL.String())
if err != nil {
log.Printf("Error calling url '%s' : %s ", googleURL, err)
return "Sorry I had a problem finding that image from Google"
}
defer resp.Body.Close()
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
log.Printf("Error reading results from HTTP Request '%s': %s", googleURL, err)
return "Sorry I had a problem finding that image from Google"
}
var results map[string]interface{}
if err = json.Unmarshal(body, &results); err != nil {
log.Printf("%T\n%s\n%#v\n", err, err, err)
switch v := err.(type) {
case *json.SyntaxError:
log.Println(string(body[v.Offset-40 : v.Offset]))
}
log.Printf("%s", body)
return "Sorry I had a problem finding that image from Google"
}
imageList, ok := results["responseData"].(map[string]interface{})["results"]
var image string
var images []interface{}
if ok {
images = imageList.([]interface{})
if len(images) > 0 {
rand.Seed(time.Now().Unix())
i := images[rand.Intn(len(images))].(map[string]interface{})
image = i["unescapedUrl"].(string)
}
reURL, err := regexp.Compile(`(?i).(png|jpe?g|gif)$`)
if err != nil {
log.Printf("Error compiling Regex to parse returned URL '%s': %s", image, err)
return ""
}
if !reURL.MatchString(image) {
image = image + ".png"
}
}
return image
}