serval-dna/meshmb.c

#include "serval_types.h"
#include "dataformats.h"
#include "cli.h"
#include "log.h"
#include "debug.h"
#include "instance.h"
#include "conf.h"
#include "commandline.h"
#include "overlay_buffer.h"

static int meshmb_send(keyring_identity *id, const char *message, size_t message_len,
  unsigned nassignments, const struct rhizome_manifest_field_assignment *assignments){

  struct message_ply ply;
  bzero(&ply, sizeof ply);

  bcopy(id->sign_pk, &ply.bundle_id, sizeof(ply.bundle_id));
  ply.known_bid = 1;

  struct overlay_buffer *b = ob_new();
  message_ply_append_message(b, message, message_len);
  message_ply_append_timestamp(b);
  assert(!ob_overrun(b));

  // TODO add id card details to manifest
  int ret = message_ply_append(id, RHIZOME_SERVICE_MESHMB, NULL, &ply, b, nassignments, assignments);
  ob_free(b);

  return ret;
}

DEFINE_CMD(app_meshmb_send, 0,
  "Append a public broadcast message to your feed",
  "meshmb", "send" KEYRING_PIN_OPTIONS, "<id>", "<message>", "...");
static int app_meshmb_send(const struct cli_parsed *parsed, struct cli_context *UNUSED(context))
{
  const char *idhex, *message;
  if (cli_arg(parsed, "id", &idhex, str_is_identity, "") == -1
    || cli_arg(parsed, "message", &message, NULL, "") == -1)
    return -1;

  unsigned nfields = (parsed->varargi == -1) ? 0 : parsed->argc - (unsigned)parsed->varargi;
  struct rhizome_manifest_field_assignment fields[nfields];
  if (nfields) {
    assert(parsed->varargi >= 0);
    if (rhizome_parse_field_assignments(fields, nfields, parsed->args + parsed->varargi)==-1)
      return -1;
  }

  identity_t identity;
  if (str_to_identity_t(&identity, idhex) == -1)
    return WHY("Invalid identity");

  if (create_serval_instance_dir() == -1)
    return -1;
  if (!(keyring = keyring_open_instance_cli(parsed)))
    return -1;

  int ret = -1;
  if (rhizome_opendb() == -1)
    goto end;

  keyring_identity *id = keyring_find_identity(keyring, &identity);
  if (!id){
    WHY("Invalid identity");
    goto end;
  }

  ret = meshmb_send(id, message, strlen(message)+1, nfields, fields);
end:
  keyring_free(keyring);
  keyring = NULL;
  return ret;
}

DEFINE_CMD(app_meshmb_read, 0,
  "Read a broadcast message feed.",
  "meshmb", "read", "<id>");
static int app_meshmb_read(const struct cli_parsed *parsed, struct cli_context *context)
{
  const char *hex_id;
  if (cli_arg(parsed, "id", &hex_id, str_is_identity, "") == -1)
    return -1;

  rhizome_bid_t bid;
  if (str_to_rhizome_bid_t(&bid, hex_id) == -1)
    return WHY("Invalid Identity");

  /* Ensure the Rhizome database exists and is open */
  if (create_serval_instance_dir() == -1)
    return -1;
  if (rhizome_opendb() == -1)
    return -1;

  struct message_ply_read read;
  bzero(&read, sizeof read);

  if (message_ply_read_open(&read, &bid)==-1)
    return -1;

  int ret=0;
  int row_id=0;
  const char *names[]={
    "_id","offset","age","message"
  };
  cli_columns(context, 4, names);
  time_s_t timestamp = 0;
  time_s_t now = gettime();

  while(message_ply_read_prev(&read)==0){
    switch(read.type){
      case MESSAGE_BLOCK_TYPE_TIME:
	if (read.record_length<4){
	  WARN("Malformed ply, expected 4 byte timestamp");
	  continue;
	}
	timestamp = read_uint32(read.record);
	break;

      case MESSAGE_BLOCK_TYPE_MESSAGE:
	cli_put_long(context, row_id++, ":");
	cli_put_long(context, read.record_end_offset, ":");
	cli_put_long(context, timestamp ? (long)(now - timestamp) : (long)-1, ":");
	cli_put_string(context, (const char *)read.record, "\n");

	break;

      case MESSAGE_BLOCK_TYPE_ACK:
	// TODO, link to some other ply?
	break;

      default:
	//ignore unknown types
	break;
    }
  }

  message_ply_read_close(&read);
  return ret;
}

DEFINE_CMD(app_meshmb_find, 0,
  "Browse available broadcast message feeds",
  "meshmb", "find", "[<search>]");
static int app_meshmb_find(const struct cli_parsed *parsed, struct cli_context *context)
{
  const char *search=NULL;
  cli_arg(parsed, "search", &search, NULL, "");
  // Ensure the Rhizome database exists and is open
  if (create_serval_instance_dir() == -1)
    return -1;
  if (rhizome_opendb() == -1)
    return -1;

  struct rhizome_list_cursor cursor;
  bzero(&cursor, sizeof cursor);
  cursor.service = RHIZOME_SERVICE_MESHMB;
  cursor.name = search && search[0] ? search : NULL;

  //TODO hide feeds that have been blocked

  if (rhizome_list_open(&cursor) == -1)
    return -1;

  const char *names[]={
    "_id",
    "id",
    "version",
    "date",
    "name"
  };
  cli_columns(context, 5, names);

  unsigned rowcount=0;
  int n;

  while ((n = rhizome_list_next(&cursor)) == 1) {
    rowcount++;
    rhizome_manifest *m = cursor.manifest;
    cli_put_long(context, m->rowid, ":");
    cli_put_hexvalue(context, m->cryptoSignPublic.binary, sizeof m->cryptoSignPublic.binary, ":");
    cli_put_long(context, m->version, ":");
    cli_put_long(context, m->has_date ? m->date : 0, ":");
    cli_put_string(context, m->name, "\n");
  }
  rhizome_list_release(&cursor);
  cli_row_count(context, rowcount);
  return 0;
}

/*
DEFINE_CMD(app_meshmb_follow, 0,
  "",
  "meshmb", "follow|ignore|block" KEYRING_PIN_OPTIONS, "<id>", "<peer>");
static int app_meshmb_follow(const struct cli_parsed *parsed, struct cli_context *context)
{
  return 0;
}

DEFINE_CMD(app_meshmb_list, 0,
  "",
  "meshmb", "list", "following|blocked" KEYRING_PIN_OPTIONS, "--last-message", "<id>");
static int app_meshmb_list(const struct cli_parsed *parsed, struct cli_context *context)
{
  return 0;
}

DEFINE_CMD(app_meshmb_news, 0,
  "",
  "meshmb", "news" KEYRING_PIN_OPTIONS, "<sid>");
static int app_meshmb_news(const struct cli_parsed *parsed, struct cli_context *context)
{
  return 0;
}
*/