Feat: add memory [wip]

storage/memory.go

@@ -0,0 +1,44 @@
+package storage
+
+import "elefant/models"
+
+type Memories interface {
+	Memorise(m *models.Memory) (*models.Memory, error)
+	Recall(agent, topic string) (string, error)
+	RecallTopics(agent string) ([]string, error)
+}
+
+func (p ProviderSQL) Memorise(m *models.Memory) (*models.Memory, error) {
+	query := "INSERT INTO memories (agent, topic, mind) VALUES (:agent, :topic, :mind) RETURNING *;"
+	stmt, err := p.db.PrepareNamed(query)
+	if err != nil {
+		return nil, err
+	}
+	defer stmt.Close()
+	var memory models.Memory
+	err = stmt.Get(&memory, m)
+	if err != nil {
+		return nil, err
+	}
+	return &memory, nil
+}
+
+func (p ProviderSQL) Recall(agent, topic string) (string, error) {
+	query := "SELECT mind FROM memories WHERE agent = $1 AND topic = $2"
+	var mind string
+	err := p.db.Get(&mind, query, agent, topic)
+	if err != nil {
+		return "", err
+	}
+	return mind, nil
+}
+
+func (p ProviderSQL) RecallTopics(agent string) ([]string, error) {
+	query := "SELECT DISTINCT topic FROM memories WHERE agent = $1"
+	var topics []string
+	err := p.db.Select(&topics, query, agent)
+	if err != nil {
+		return nil, err
+	}
+	return topics, nil
+}