add Block + Component, add TextComponent with min, max and regex validators and early NumberComponent

internal/block/block.go

@@ -0,0 +1,42 @@
+package block
+
+import (
+	"encoding/json"
+	"fmt"
+)
+
+type Block struct {
+	Components []Component
+}
+
+type BlockInstance struct {
+	Components []ComponentInstance
+}
+
+func (b *BlockInstance) FromJSON(block *Block, data []byte) error {
+	var raw map[string]json.RawMessage
+	if err := json.Unmarshal(data, &raw); err != nil {
+		return err
+	}
+
+	var components []ComponentInstance
+
+	for _, c := range block.Components {
+		jsonValue, ok := raw[c.Identifier()]
+		if !ok {
+			continue
+		}
+		instance := c.NewInstance()
+
+		if err := instance.FromJSON(c, jsonValue); err != nil {
+			return err
+		}
+		components = append(components, instance)
+
+		fmt.Println(c.Identifier(), instance)
+	}
+
+	b.Components = components
+
+	return nil
+}