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nostrdb/blocks: add note block iterator

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This adds an api that walks along and pulls compact note block data out of
nostrdb.

Signed-off-by: William Casarin <jb55@jb55.com>
This commit is contained in:
William Casarin
2025-08-11 16:39:43 -07:00
committed by Daniel D’Aquino
parent 6f9bd6c4f4
commit 034f2cc02f
8 changed files with 247 additions and 152 deletions
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nostrdb/src/block.h
+12 -17
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@@ -4,12 +4,14 @@
#include "invoice.h"
#include "str_block.h"
#include "cursor.h"
#include "nostr_bech32.h"
#include "nostrdb.h"
#include <inttypes.h>
#pragma pack(push, 1)
struct ndb_note_blocks {
struct ndb_blocks {
unsigned char version;
unsigned char padding[3];
@@ -17,41 +19,34 @@ struct ndb_note_blocks {
uint32_t num_blocks;
uint32_t blocks_size;
// future expansion
uint32_t reserved[4];
uint32_t reserved[2];
unsigned char blocks[0]; // see ndb_block definition
};
#pragma pack(pop)
enum block_type {
BLOCK_HASHTAG = 1,
BLOCK_TEXT = 2,
BLOCK_MENTION_INDEX = 3,
BLOCK_MENTION_BECH32 = 4,
BLOCK_URL = 5,
BLOCK_INVOICE = 6,
};
struct ndb_mention_bech32_block {
struct str_block str;
struct ndb_str_block str;
struct nostr_bech32 bech32;
};
struct ndb_invoice_block {
struct str_block invstr;
struct ndb_str_block invstr;
struct ndb_invoice invoice;
};
struct note_block {
enum block_type type;
struct ndb_block {
enum ndb_block_type type;
union {
struct str_block str;
struct ndb_str_block str;
struct ndb_invoice_block invoice;
struct ndb_mention_bech32_block mention_bech32;
uint32_t mention_index;
} block;
};
int push_str_block(struct cursor *buf, const char *content, struct ndb_str_block *block);
int pull_str_block(struct cursor *buf, const char *content, struct ndb_str_block *block);
#endif // NDB_BLOCK_H