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@ -2,17 +2,49 @@ package main
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import (
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"context"
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"database/sql"
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"encoding/json"
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"fmt"
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"log"
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"net/http"
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"github.com/jmoiron/sqlx"
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_ "github.com/mattn/go-sqlite3"
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translate "cloud.google.com/go/translate/apiv3"
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"cloud.google.com/go/translate/apiv3/translatepb"
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)
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const project_id string = "india-translate-testing-452100"
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type translationStruct struct {
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En string `db:"english" json:"en"`
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Hi string `db:"hindi" json:"hi"`
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Bn string `db:"bengali" json:"bn"`
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Mr string `db:"marathi" json:"mr"`
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Ta string `db:"tamil" json:"ta"`
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Te string `db:"telugu" json:"te"`
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Ml string `db:"malayalam" json:"ml"`
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Kn string `db:"kannada" json:"kn"`
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Gu string `db:"gujarati" json:"gu"`
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Or string `db:"oriya" json:"or"`
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Ur string `db:"urdu" json:"ur"`
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Lus string `db:"mizo" json:"lus"`
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As string `db:"assamese" json:"as"`
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Pa string `db:"punjabi" json:"pa"`
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Mai string `db:"maithili" json:"nai"`
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Mwr string `db:"marwari" json:"mwr"`
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Sat string `db:"santali" json:"sat"`
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Ne string `db:"nepali" json:"ne"`
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Gom string `db:"konkani" json:"gom"`
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Tcy string `db:"tulu" json:"tcy"`
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Bho string `db:"bhojpuri" json:"bho"`
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Doi string `db:"dogri" json:"doi"`
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Mni_mtei string `db:"manipuri" json:"mni_mtei"`
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Sd string `db:"sindhi" json:"sd"`
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Awa string `db:"awadhi" json:"awa"`
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}
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var lang_codes []string = []string{
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"hi", // Hindi
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"bn", // Bengali
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@ -40,6 +72,39 @@ var lang_codes []string = []string{
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"awa", // Awadhi
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}
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var db *sqlx.DB
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/*
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Returns the cached translation from the database, for the given english text. The first parameter
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indicates whether or not the translation exists.
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*/
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func getCachedTranslation(data string) (bool, translationStruct) {
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prepared, err := db.Preparex("SELECT * from TRANSLATIONS WHERE english = ? COLLATE NOCASE")
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if err != nil {
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panic(err)
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}
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translations := translationStruct{}
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err = prepared.Get(&translations, data)
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if err != nil {
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if err == sql.ErrNoRows {
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return false, translations
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} else {
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panic(err)
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}
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} else {
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return true, translations
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}
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}
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func addToDatabase(translation translationStruct) {
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_, err := db.NamedExec(`INSERT INTO translations VALUES (:english, :hindi, :bengali, :marathi, :tamil, :telugu, :kannada, :malayalam, :oriya, :gujarati, :marwari, :urdu, :mizo, :assamese, :punjabi, :maithili, :santali, :nepali, :konkani, :tulu, :bhojpuri, :dogri, :manipuri, :sindhi, :awadhi)`, &translation)
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if err != nil {
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panic(err)
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}
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}
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func translateText(text string, targetLang string) (result string, err error) {
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return translateTextHelper(project_id, "en-US", targetLang, text)
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}
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@ -80,22 +145,39 @@ func handler(w http.ResponseWriter, r *http.Request) {
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queries := r.URL.Query()
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toTranslate := queries["query"][0]
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langToTranslation := make(map[string]string)
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for _, lang_code := range lang_codes {
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translation, err := translateText(toTranslate, lang_code)
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if ok, translation := getCachedTranslation(toTranslate); ok {
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translationJson, _ := json.Marshal(translation)
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fmt.Fprintf(w, "%v", string(translationJson))
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} else {
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langToTranslation := make(map[string]string)
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for _, lang_code := range lang_codes {
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translation, err := translateText(toTranslate, lang_code)
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if err != nil {
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panic(err)
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}
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langToTranslation[lang_code] = translation
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}
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langToTranslationJson, _ := json.Marshal(langToTranslation)
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translation := translationStruct{}
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err := json.Unmarshal(langToTranslationJson, &translation)
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translation.En = toTranslate // langToTranslation doesn't contain the english value
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addToDatabase(translation)
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if err != nil {
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panic(err)
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}
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langToTranslation[lang_code] = translation
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fmt.Fprintf(w, "%v", string(langToTranslationJson))
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}
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langToTranslationJson, _ := json.Marshal(langToTranslation)
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fmt.Fprintf(w, "%v", string(langToTranslationJson))
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// fmt.Fprintf(w, "Hi there, I love %s!", r.URL.Path[1:])
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}
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func main() {
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fmt.Printf("Starting server...")
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var err error
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db, err = sqlx.Connect("sqlite3", "translations.db")
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if err != nil {
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panic(err)
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}
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defer db.Close()
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http.HandleFunc("/", handler)
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log.Fatal(http.ListenAndServe(":9090", nil))
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}
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