builder.go

// Package querybm provides a simple SQL query builder and mapper that works well with models generated by sqlc.
package querybm

import "github.com/tecowl/querybm/statement"

// Builder defines the interface for components that can build SQL statement parts.
type Builder interface {
	// Build modifies the given statement by adding SQL components to it.
	Build(st *statement.Statement)
}

// Condition is an alias for Builder used specifically for WHERE clause conditions.
type Condition = Builder

// BuildFunc is a function type that takes a statement and modifies it.
// It is used to create a Builder from a function.
// This allows for more flexible and functional-style building of SQL statements.
type BuildFunc = func(st *statement.Statement)

type buildFuncWrapper struct {
	fn BuildFunc
}

var _ Builder = (*buildFuncWrapper)(nil)

// NewBuilder creates a new Builder from a BuildFunc.
// This allows you to define how the SQL statement should be built using a function.
// This is useful for cases where you want to encapsulate the building logic in a function rather than a struct.
func NewBuilder(fn BuildFunc) Builder { // nolint:ireturn
	return &buildFuncWrapper{fn: fn}
}

// Build implements Builder.
func (b *buildFuncWrapper) Build(st *statement.Statement) {
	b.fn(st)
}

// BuildFuncs is a slice of BuildFunc that implements the Builder interface.
type BuildFuncs []BuildFunc

// Build implements Builder for BuildFuncs.
func (s BuildFuncs) Build(st *statement.Statement) {
	for _, fn := range s {
		fn(st)
	}
}