refactor: move pkg/ to internal/ and update imports

Restructure project by relocating package contents from pkg/ to internal/ to better reflect internal-only usage. This commit is initial step to prepare project for public api

internal/search/search_options_builder.go

@@ -0,0 +1,86 @@
+// ALR - Any Linux Repository
+// Copyright (C) 2025 The ALR Authors
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package search
+
+import (
+	"fmt"
+	"strings"
+)
+
+type SearchOptions struct {
+	conditions []string
+	args       []any
+}
+
+func (o *SearchOptions) WhereClause() (string, []any) {
+	if len(o.conditions) == 0 {
+		return "", nil
+	}
+	return strings.Join(o.conditions, " AND "), o.args
+}
+
+type SearchOptionsBuilder struct {
+	options SearchOptions
+}
+
+func NewSearchOptions() *SearchOptionsBuilder {
+	return &SearchOptionsBuilder{}
+}
+
+func (b *SearchOptionsBuilder) withGeneralLike(key, value string) *SearchOptionsBuilder {
+	if value != "" {
+		b.options.conditions = append(b.options.conditions, fmt.Sprintf("%s LIKE ?", key))
+		b.options.args = append(b.options.args, "%"+value+"%")
+	}
+	return b
+}
+
+func (b *SearchOptionsBuilder) withGeneralEqual(key string, value any) *SearchOptionsBuilder {
+	if value != "" {
+		b.options.conditions = append(b.options.conditions, fmt.Sprintf("%s = ?", key))
+		b.options.args = append(b.options.args, value)
+	}
+	return b
+}
+
+func (b *SearchOptionsBuilder) withGeneralJsonArrayContains(key string, value any) *SearchOptionsBuilder {
+	if value != "" {
+		b.options.conditions = append(b.options.conditions, fmt.Sprintf("json_array_contains(%s, ?)", key))
+		b.options.args = append(b.options.args, value)
+	}
+	return b
+}
+
+func (b *SearchOptionsBuilder) WithName(name string) *SearchOptionsBuilder {
+	return b.withGeneralLike("name", name)
+}
+
+func (b *SearchOptionsBuilder) WithDescription(description string) *SearchOptionsBuilder {
+	return b.withGeneralLike("description", description)
+}
+
+func (b *SearchOptionsBuilder) WithRepository(repository string) *SearchOptionsBuilder {
+	return b.withGeneralEqual("repository", repository)
+}
+
+func (b *SearchOptionsBuilder) WithProvides(provides string) *SearchOptionsBuilder {
+	return b.withGeneralJsonArrayContains("provides", provides)
+}
+
+func (b *SearchOptionsBuilder) Build() *SearchOptions {
+	return &b.options
+}