add new command EXPIRE

Signed-off-by: Issif <issif+github@gadz.org>

Author: Issif

redisearch/document.go

@@ -17,6 +17,7 @@ type Document struct {
 	Id         string
 	Score      float32
 	Payload    []byte
+	TTL        int
 	Properties map[string]interface{}
 }
 
@@ -70,6 +71,12 @@ func (d Document) Set(name string, value interface{}) Document {
 	return d
 }
 
+// SetTTL sets the ttl and its option in the document
+func (d Document) SetTTL(ttl int) Document {
+	d.TTL = ttl
+	return d
+}
+
 // All punctuation marks and whitespaces (besides underscores) separate the document and queries into tokens.
 // e.g. any character of `,.<>{}[]"':;!@#$%^&*()-+=~` will break the text into terms.
 // So the text `foo-bar.baz...bag` will be tokenized into `[foo, bar, baz, bag]`

redisearch/query.go

@@ -445,6 +445,18 @@ func (i *Client) IndexOptions(opts IndexingOptions, docs ...Document) error {
 
 			return merr
 		}
+		if doc.TTL > 0 {
+			argsttl := make(redis.Args, 0, 2)
+			argsttl = append(argsttl, doc.Id, doc.TTL)
+			if err := conn.Send("EXPIRE", argsttl...); err != nil {
+				if merr == nil {
+					merr = NewMultiError(len(docs))
+				}
+				merr[ii] = err
+
+				return merr
+			}
+		}
 		n++
 	}