add frontend template + GET /users/{userRef} route

backend/db/db.go

@@ -2,8 +2,11 @@ package db
 
 import (
 	"context"
+	"encoding/json"
+	"fmt"
 	"os"
 
+	"emperror.dev/errors"
 	"github.com/Masterminds/squirrel"
 	"github.com/jackc/pgx/v4/pgxpool"
 	"github.com/mediocregopher/radix/v4"
@@ -47,3 +50,69 @@ func (db *DB) MultiCmd(ctx context.Context, cmds ...radix.Action) error {
 	}
 	return nil
 }
+
+// SetJSON sets the given key to v marshaled as JSON.
+func (db *DB) SetJSON(ctx context.Context, key string, v any, args ...string) error {
+	b, err := json.Marshal(v)
+	if err != nil {
+		return errors.Wrap(err, "marshaling json")
+	}
+
+	cmdArgs := make([]string, 0, len(args)+2)
+	cmdArgs = append(cmdArgs, key, string(b))
+	cmdArgs = append(cmdArgs, args...)
+
+	err = db.Redis.Do(ctx, radix.Cmd(nil, "SET", cmdArgs...))
+	if err != nil {
+		return errors.Wrap(err, "writing to Redis")
+	}
+	return nil
+}
+
+// GetJSON gets the given key as a JSON object.
+func (db *DB) GetJSON(ctx context.Context, key string, v any) error {
+	var b []byte
+
+	err := db.Redis.Do(ctx, radix.Cmd(&b, "GET", key))
+	if err != nil {
+		return errors.Wrap(err, "reading from Redis")
+	}
+
+	if b == nil {
+		return nil
+	}
+
+	if v == nil {
+		return fmt.Errorf("nil pointer passed into GetJSON")
+	}
+
+	err = json.Unmarshal(b, v)
+	if err != nil {
+		return errors.Wrap(err, "unmarshaling json")
+	}
+	return nil
+}
+
+// GetDelJSON gets the given key as a JSON object and deletes it.
+func (db *DB) GetDelJSON(ctx context.Context, key string, v any) error {
+	var b []byte
+
+	err := db.Redis.Do(ctx, radix.Cmd(&b, "GETDEL", key))
+	if err != nil {
+		return errors.Wrap(err, "reading from Redis")
+	}
+
+	if b == nil {
+		return nil
+	}
+
+	if v == nil {
+		return fmt.Errorf("nil pointer passed into GetDelJSON")
+	}
+
+	err = json.Unmarshal(b, v)
+	if err != nil {
+		return errors.Wrap(err, "unmarshaling json")
+	}
+	return nil
+}