start moving some database stuff around

internal/db/pg/basic.go

@@ -0,0 +1,97 @@
+package pg
+
+import (
+	"errors"
+	"strings"
+
+	"github.com/go-pg/pg/v10"
+	"github.com/superseriousbusiness/gotosocial/internal/db"
+)
+
+func (ps *postgresService) Put(i interface{}) error {
+	_, err := ps.conn.Model(i).Insert(i)
+	if err != nil && strings.Contains(err.Error(), "duplicate key value violates unique constraint") {
+		return db.ErrAlreadyExists{}
+	}
+	return err
+}
+
+func (ps *postgresService) GetByID(id string, i interface{}) error {
+	if err := ps.conn.Model(i).Where("id = ?", id).Select(); err != nil {
+		if err == pg.ErrNoRows {
+			return db.ErrNoEntries{}
+		}
+		return err
+
+	}
+	return nil
+}
+
+func (ps *postgresService) GetWhere(where []db.Where, i interface{}) error {
+	if len(where) == 0 {
+		return errors.New("no queries provided")
+	}
+
+	q := ps.conn.Model(i)
+	for _, w := range where {
+
+		if w.Value == nil {
+			q = q.Where("? IS NULL", pg.Ident(w.Key))
+		} else {
+			if w.CaseInsensitive {
+				q = q.Where("LOWER(?) = LOWER(?)", pg.Safe(w.Key), w.Value)
+			} else {
+				q = q.Where("? = ?", pg.Safe(w.Key), w.Value)
+			}
+		}
+	}
+
+	if err := q.Select(); err != nil {
+		if err == pg.ErrNoRows {
+			return db.ErrNoEntries{}
+		}
+		return err
+	}
+	return nil
+}
+
+func (ps *postgresService) GetAll(i interface{}) error {
+	if err := ps.conn.Model(i).Select(); err != nil {
+		if err == pg.ErrNoRows {
+			return db.ErrNoEntries{}
+		}
+		return err
+	}
+	return nil
+}
+
+func (ps *postgresService) DeleteByID(id string, i interface{}) error {
+	if _, err := ps.conn.Model(i).Where("id = ?", id).Delete(); err != nil {
+		// if there are no rows *anyway* then that's fine
+		// just return err if there's an actual error
+		if err != pg.ErrNoRows {
+			return err
+		}
+	}
+	return nil
+}
+
+func (ps *postgresService) DeleteWhere(where []db.Where, i interface{}) error {
+	if len(where) == 0 {
+		return errors.New("no queries provided")
+	}
+
+	q := ps.conn.Model(i)
+	for _, w := range where {
+		q = q.Where("? = ?", pg.Safe(w.Key), w.Value)
+	}
+
+	if _, err := q.Delete(); err != nil {
+		// if there are no rows *anyway* then that's fine
+		// just return err if there's an actual error
+		if err != pg.ErrNoRows {
+			return err
+		}
+	}
+	return nil
+}