Move go-sql-queryrepo package into go-kit/sqr

Signed-off-by: Jan Tytgat <jan.tytgat@corelayer.eu>

sqr/preparer.go

@@ -0,0 +1,76 @@
+package queryrepo
+
+import (
+	"context"
+	"database/sql"
+	"errors"
+	"io/fs"
+)
+
+// Preparer defines the interface to create a prepared statement.
+type Preparer interface {
+	Prepare(query string) (*sql.Stmt, error)
+	PrepareContext(ctx context.Context, query string) (*sql.Stmt, error)
+}
+
+// Prepare creates a prepared statement for the supplied Preparer by looking up a query in the supplied repository.
+// It returns an nil pointer and an error if either the query cannot be found in the supplied repository, or the statement preparation fails.
+func Prepare[T Preparer](t T, r *Repository, collectionName, queryName string) (*sql.Stmt, error) {
+	if r == nil {
+		return nil, errors.New("repository is nil")
+	}
+
+	var err error
+	var query string
+
+	if query, err = r.Get(collectionName, queryName); err != nil {
+		return nil, err
+	}
+	return t.Prepare(query)
+}
+
+// Prepare creates a prepared statement for the supplied Preparer by looking up a query in the supplied repository using a context.
+// It returns an nil pointer and an error if either the query cannot be found in the supplied repository, or the statement preparation fails.
+func PrepareContext[T Preparer](ctx context.Context, t T, r *Repository, collectionName, queryName string) (*sql.Stmt, error) {
+	if r == nil {
+		return nil, errors.New("repository is nil")
+	}
+
+	var err error
+	var query string
+
+	if query, err = r.Get(collectionName, queryName); err != nil {
+		return nil, err
+	}
+	return t.PrepareContext(ctx, query)
+}
+
+// PrepareFromFs creates a prepared statement for the supplied Preparer by looking up a query in the supplied filesystem.
+// It returns an nil pointer and an error if either the query cannot be found in the supplied filesystem, or the statement preparation fails.
+func PrepareFromFs[T Preparer](t T, f fs.FS, rootPath, collectionName, queryName string) (*sql.Stmt, error) {
+	if f == nil {
+		return nil, errors.New("invalid filesystem")
+	}
+	var err error
+	var query string
+
+	if query, err = LoadQueryFromFs(f, rootPath, collectionName, queryName); err != nil {
+		return nil, err
+	}
+	return t.Prepare(query)
+}
+
+// PrepareFromFs creates a prepared statement for the supplied Preparer by looking up a query in the supplied filesystem using a context.
+// It returns an nil pointer and an error if either the query cannot be found in the supplied filesystem, or the statement preparation fails.
+func PrepareFromFsContext[T Preparer](ctx context.Context, t T, f fs.FS, rootPath, collectionName, queryName string) (*sql.Stmt, error) {
+	if f == nil {
+		return nil, errors.New("invalid filesystem")
+	}
+	var err error
+	var query string
+
+	if query, err = LoadQueryFromFs(f, rootPath, collectionName, queryName); err != nil {
+		return nil, err
+	}
+	return t.PrepareContext(ctx, query)
+}