add /api/engines; move stuff to utils (closes #17)

utils/main.go

@@ -3,6 +3,8 @@ package utils
 import (
 	"github.com/gofiber/fiber/v2"
 	"regexp"
+	"os"
+	"codeberg.org/aryak/libmozhi"
 )
 
 func GetQueryOrFormValue(c *fiber.Ctx, key string) string {
@@ -13,6 +15,13 @@ func GetQueryOrFormValue(c *fiber.Ctx, key string) string {
 	}
 }
 
+func EnvTrueNoExist(env string) bool {
+	if _, ok := os.LookupEnv(env); ok == false || os.Getenv(env) == "true" {
+		return true
+	}
+	return false
+}
+
 func Sanitize(str string, strip string) string {
 	nonAlphanumericRegex := regexp.MustCompile(`[^a-zA-Z]+`)
 	nonAlphaRegex := regexp.MustCompile(`[^a-zA-Z0-9]+`)
@@ -23,3 +32,44 @@ func Sanitize(str string, strip string) string {
 	}
 	return ""
 }
+
+func EngineList() map[string]string {
+	engines := map[string]string{"all": "All Engines", "google": "Google", "deepl": "DeepL", "duckduckgo": "DuckDuckGo", "libre": "LibreTranslate", "mymemory": "MyMemory", "reverso": "Reverso", "watson": "Watson", "yandex": "Yandex"}
+	if EnvTrueNoExist("MOZHI_GOOGLE_ENABLED") == false {
+		delete(engines, "google")
+	} else if EnvTrueNoExist("MOZHI_DEEPL_ENABLED") == false {
+		delete(engines, "deepl")
+	} else if EnvTrueNoExist("MOZHI_DUCKDUCKGO_ENABLED") == false {
+		delete(engines, "duckduckgo")
+	} else if EnvTrueNoExist("MOZHI_LIBRETRANSLATE_ENABLED") == false || EnvTrueNoExist("MOZHI_LIBRETRANSLATE_URL") {
+		delete(engines, "libre")
+	} else if EnvTrueNoExist("MOZHI_MYMEMORY_ENABLED") == false {
+		delete(engines, "mymemory")
+	} else if EnvTrueNoExist("MOZHI_REVERSO_ENABLED") == false {
+		delete(engines, "reverso")
+	} else if EnvTrueNoExist("MOZHI_WATSON_ENABLED") == false {
+		delete(engines, "watson")
+	} else if EnvTrueNoExist("MOZHI_YANDEX_ENABLED") == false {
+		delete(engines, "yandex")
+	}
+	return engines
+}
+
+// DeduplicateLists deduplicates a slice of List based on the Id field
+func DeDuplicateLists(input []libmozhi.List) []libmozhi.List {
+	// Create a map to store unique Ids
+	uniqueIds := make(map[string]struct{})
+	result := []libmozhi.List{}
+
+	// Iterate over the input slice
+	for _, item := range input {
+		// Check if the Id is unique
+		if _, found := uniqueIds[item.Id]; !found {
+			// Add the Id to the map and append the List to the result slice
+			uniqueIds[item.Id] = struct{}{}
+			result = append(result, item)
+		}
+	}
+
+	return result
+}