support multiline stdin on decode, encode and fetch, and improve the helpers.

fetch.go

@@ -24,67 +24,71 @@ var fetch = &cli.Command{
 	},
 	ArgsUsage: "[nip19code]",
 	Action: func(c *cli.Context) error {
-		filter := nostr.Filter{}
-		code := getStdinOrFirstArgument(c)
+		for code := range getStdinLinesOrFirstArgument(c) {
+			filter := nostr.Filter{}
 
-		prefix, value, err := nip19.Decode(code)
-		if err != nil {
-			return err
-		}
-
-		relays := c.StringSlice("relay")
-		if err := validateRelayURLs(relays); err != nil {
-			return err
-		}
-		var authorHint string
-
-		switch prefix {
-		case "nevent":
-			v := value.(nostr.EventPointer)
-			filter.IDs = append(filter.IDs, v.ID)
-			if v.Author != "" {
-				authorHint = v.Author
+			prefix, value, err := nip19.Decode(code)
+			if err != nil {
+				lineProcessingError(c, "failed to decode: %s", err)
+				continue
 			}
-			relays = v.Relays
-		case "naddr":
-			v := value.(nostr.EntityPointer)
-			filter.Tags = nostr.TagMap{"d": []string{v.Identifier}}
-			filter.Kinds = append(filter.Kinds, v.Kind)
-			filter.Authors = append(filter.Authors, v.PublicKey)
-			authorHint = v.PublicKey
-			relays = v.Relays
-		case "nprofile":
-			v := value.(nostr.ProfilePointer)
-			filter.Authors = append(filter.Authors, v.PublicKey)
-			filter.Kinds = append(filter.Kinds, 0)
-			authorHint = v.PublicKey
-			relays = v.Relays
-		case "npub":
-			v := value.(string)
-			filter.Authors = append(filter.Authors, v)
-			filter.Kinds = append(filter.Kinds, 0)
-			authorHint = v
-		}
 
-		pool := nostr.NewSimplePool(c.Context)
-		if authorHint != "" {
-			relayList := sdk.FetchRelaysForPubkey(c.Context, pool, authorHint,
-				"wss://purplepag.es", "wss://offchain.pub", "wss://public.relaying.io")
-			for _, relayListItem := range relayList {
-				if relayListItem.Outbox {
-					relays = append(relays, relayListItem.URL)
+			relays := c.StringSlice("relay")
+			if err := validateRelayURLs(relays); err != nil {
+				return err
+			}
+			var authorHint string
+
+			switch prefix {
+			case "nevent":
+				v := value.(nostr.EventPointer)
+				filter.IDs = append(filter.IDs, v.ID)
+				if v.Author != "" {
+					authorHint = v.Author
+				}
+				relays = v.Relays
+			case "naddr":
+				v := value.(nostr.EntityPointer)
+				filter.Tags = nostr.TagMap{"d": []string{v.Identifier}}
+				filter.Kinds = append(filter.Kinds, v.Kind)
+				filter.Authors = append(filter.Authors, v.PublicKey)
+				authorHint = v.PublicKey
+				relays = v.Relays
+			case "nprofile":
+				v := value.(nostr.ProfilePointer)
+				filter.Authors = append(filter.Authors, v.PublicKey)
+				filter.Kinds = append(filter.Kinds, 0)
+				authorHint = v.PublicKey
+				relays = v.Relays
+			case "npub":
+				v := value.(string)
+				filter.Authors = append(filter.Authors, v)
+				filter.Kinds = append(filter.Kinds, 0)
+				authorHint = v
+			}
+
+			pool := nostr.NewSimplePool(c.Context)
+			if authorHint != "" {
+				relayList := sdk.FetchRelaysForPubkey(c.Context, pool, authorHint,
+					"wss://purplepag.es", "wss://offchain.pub", "wss://public.relaying.io")
+				for _, relayListItem := range relayList {
+					if relayListItem.Outbox {
+						relays = append(relays, relayListItem.URL)
+					}
 				}
 			}
+
+			if len(relays) == 0 {
+				lineProcessingError(c, "no relay hints found")
+				continue
+			}
+
+			for ie := range pool.SubManyEose(c.Context, relays, nostr.Filters{filter}) {
+				fmt.Println(ie.Event)
+			}
 		}
 
-		if len(relays) == 0 {
-			return fmt.Errorf("no relay hints found")
-		}
-
-		for ie := range pool.SubManyEose(c.Context, relays, nostr.Filters{filter}) {
-			fmt.Println(ie.Event)
-		}
-
+		exitIfLineProcessingError(c)
 		return nil
 	},
 }