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/* Copyright (c) 2016-2018 Dovecot authors, see the included COPYING file */
#include "lib.h"
#include "array.h"
#include "str.h"
#include "strescape.h"
#include "ostream.h"
#include "json-parser.h"
#include "doveadm.h"
#include "doveadm-server.h"
#include "doveadm-print.h"
#include "doveadm-print-private.h"
#include "client-connection.h"
struct doveadm_print_json_context {
unsigned int header_idx, header_count;
bool first_row;
bool in_stream;
bool flushed;
ARRAY(struct doveadm_print_header) headers;
pool_t pool;
string_t *str;
};
static struct doveadm_print_json_context ctx;
static void doveadm_print_json_flush_internal(void);
static void doveadm_print_json_init(void)
{
i_zero(&ctx);
ctx.pool = pool_alloconly_create("doveadm json print", 1024);
ctx.str = str_new(ctx.pool, 256);
p_array_init(&ctx.headers, ctx.pool, 1);
ctx.first_row = TRUE;
ctx.in_stream = FALSE;
}
static void
doveadm_print_json_header(const struct doveadm_print_header *hdr)
{
struct doveadm_print_header *lhdr;
lhdr = array_append_space(&ctx.headers);
lhdr->key = p_strdup(ctx.pool, hdr->key);
lhdr->flags = hdr->flags;
ctx.header_count++;
}
static void
doveadm_print_json_value_header(const struct doveadm_print_header *hdr)
{
// get header name
if (ctx.header_idx == 0) {
if (ctx.first_row == TRUE) {
ctx.first_row = FALSE;
str_append_c(ctx.str, '[');
} else {
str_append_c(ctx.str, ',');
}
str_append_c(ctx.str, '{');
} else {
str_append_c(ctx.str, ',');
}
str_append_c(ctx.str, '"');
json_append_escaped(ctx.str, hdr->key);
str_append_c(ctx.str, '"');
str_append_c(ctx.str, ':');
}
static void
doveadm_print_json_value_footer(void) {
if (++ctx.header_idx == ctx.header_count) {
ctx.header_idx = 0;
str_append_c(ctx.str, '}');
doveadm_print_json_flush_internal();
}
}
static void doveadm_print_json_print(const char *value)
{
const struct doveadm_print_header *hdr = array_idx(&ctx.headers, ctx.header_idx);
doveadm_print_json_value_header(hdr);
if (value == NULL) {
str_append(ctx.str, "null");
} else if ((hdr->flags & DOVEADM_PRINT_HEADER_FLAG_NUMBER) != 0) {
i_assert(str_is_float(value, '\0'));
str_append(ctx.str, value);
} else {
str_append_c(ctx.str, '"');
json_append_escaped(ctx.str, value);
str_append_c(ctx.str, '"');
}
doveadm_print_json_value_footer();
}
static void
doveadm_print_json_print_stream(const unsigned char *value, size_t size)
{
if (!ctx.in_stream) {
const struct doveadm_print_header *hdr =
array_idx(&ctx.headers, ctx.header_idx);
doveadm_print_json_value_header(hdr);
i_assert((hdr->flags & DOVEADM_PRINT_HEADER_FLAG_NUMBER) == 0);
str_append_c(ctx.str, '"');
ctx.in_stream = TRUE;
}
if (size == 0) {
str_append_c(ctx.str, '"');
doveadm_print_json_value_footer();
ctx.in_stream = FALSE;
return;
}
json_append_escaped_data(ctx.str, value, size);
if (str_len(ctx.str) >= IO_BLOCK_SIZE)
doveadm_print_json_flush_internal();
}
static void doveadm_print_json_flush_internal(void)
{
o_stream_nsend(doveadm_print_ostream, str_data(ctx.str), str_len(ctx.str));
str_truncate(ctx.str, 0);
}
static void doveadm_print_json_flush(void)
{
if (ctx.flushed)
return;
ctx.flushed = TRUE;
if (ctx.first_row == FALSE)
str_append_c(ctx.str,']');
else {
str_append_c(ctx.str,'[');
str_append_c(ctx.str,']');
}
doveadm_print_json_flush_internal();
}
static void doveadm_print_json_deinit(void)
{
pool_unref(&ctx.pool);
}
struct doveadm_print_vfuncs doveadm_print_json_vfuncs = {
"json",
doveadm_print_json_init,
doveadm_print_json_deinit,
doveadm_print_json_header,
doveadm_print_json_print,
doveadm_print_json_print_stream,
doveadm_print_json_flush
};
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