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// SPDX-License-Identifier: GPL-3.0-or-later
#include "json.h"
#define JSON_DATES_JS 1
#define JSON_DATES_TIMESTAMP 2
void rrdr2json(RRDR *r, BUFFER *wb, RRDR_OPTIONS options, int datatable) {
rrdset_check_rdlock(r->st);
//info("RRD2JSON(): %s: BEGIN", r->st->id);
int row_annotations = 0, dates, dates_with_new = 0;
char kq[2] = "", // key quote
sq[2] = "", // string quote
pre_label[101] = "", // before each label
post_label[101] = "", // after each label
pre_date[101] = "", // the beginning of line, to the date
post_date[101] = "", // closing the date
pre_value[101] = "", // before each value
post_value[101] = "", // after each value
post_line[101] = "", // at the end of each row
normal_annotation[201] = "", // default row annotation
overflow_annotation[201] = "", // overflow row annotation
data_begin[101] = "", // between labels and values
finish[101] = ""; // at the end of everything
if(datatable) {
dates = JSON_DATES_JS;
if( options & RRDR_OPTION_GOOGLE_JSON ) {
kq[0] = '\0';
sq[0] = '\'';
}
else {
kq[0] = '"';
sq[0] = '"';
}
row_annotations = 1;
snprintfz(pre_date, 100, " {%sc%s:[{%sv%s:%s", kq, kq, kq, kq, sq);
snprintfz(post_date, 100, "%s}", sq);
snprintfz(pre_label, 100, ",\n {%sid%s:%s%s,%slabel%s:%s", kq, kq, sq, sq, kq, kq, sq);
snprintfz(post_label, 100, "%s,%spattern%s:%s%s,%stype%s:%snumber%s}", sq, kq, kq, sq, sq, kq, kq, sq, sq);
snprintfz(pre_value, 100, ",{%sv%s:", kq, kq);
strcpy(post_value, "}");
strcpy(post_line, "]}");
snprintfz(data_begin, 100, "\n ],\n %srows%s:\n [\n", kq, kq);
strcpy(finish, "\n ]\n}");
snprintfz(overflow_annotation, 200, ",{%sv%s:%sRESET OR OVERFLOW%s},{%sv%s:%sThe counters have been wrapped.%s}", kq, kq, sq, sq, kq, kq, sq, sq);
snprintfz(normal_annotation, 200, ",{%sv%s:null},{%sv%s:null}", kq, kq, kq, kq);
buffer_sprintf(wb, "{\n %scols%s:\n [\n", kq, kq);
buffer_sprintf(wb, " {%sid%s:%s%s,%slabel%s:%stime%s,%spattern%s:%s%s,%stype%s:%sdatetime%s},\n", kq, kq, sq, sq, kq, kq, sq, sq, kq, kq, sq, sq, kq, kq, sq, sq);
buffer_sprintf(wb, " {%sid%s:%s%s,%slabel%s:%s%s,%spattern%s:%s%s,%stype%s:%sstring%s,%sp%s:{%srole%s:%sannotation%s}},\n", kq, kq, sq, sq, kq, kq, sq, sq, kq, kq, sq, sq, kq, kq, sq, sq, kq, kq, kq, kq, sq, sq);
buffer_sprintf(wb, " {%sid%s:%s%s,%slabel%s:%s%s,%spattern%s:%s%s,%stype%s:%sstring%s,%sp%s:{%srole%s:%sannotationText%s}}", kq, kq, sq, sq, kq, kq, sq, sq, kq, kq, sq, sq, kq, kq, sq, sq, kq, kq, kq, kq, sq, sq);
// remove the valueobjects flag
// google wants its own keys
if(options & RRDR_OPTION_OBJECTSROWS)
options &= ~RRDR_OPTION_OBJECTSROWS;
}
else {
kq[0] = '"';
sq[0] = '"';
if(options & RRDR_OPTION_GOOGLE_JSON) {
dates = JSON_DATES_JS;
dates_with_new = 1;
}
else {
dates = JSON_DATES_TIMESTAMP;
dates_with_new = 0;
}
if( options & RRDR_OPTION_OBJECTSROWS )
strcpy(pre_date, " { ");
else
strcpy(pre_date, " [ ");
strcpy(pre_label, ", \"");
strcpy(post_label, "\"");
strcpy(pre_value, ", ");
if( options & RRDR_OPTION_OBJECTSROWS )
strcpy(post_line, "}");
else
strcpy(post_line, "]");
snprintfz(data_begin, 100, "],\n %sdata%s:\n [\n", kq, kq);
strcpy(finish, "\n ]\n}");
buffer_sprintf(wb, "{\n %slabels%s: [", kq, kq);
buffer_sprintf(wb, "%stime%s", sq, sq);
}
// -------------------------------------------------------------------------
// print the JSON header
long c, i;
RRDDIM *rd;
// print the header lines
for(c = 0, i = 0, rd = r->st->dimensions; rd && c < r->d ;c++, rd = rd->next) {
if(unlikely(r->od[c] & RRDR_DIMENSION_HIDDEN)) continue;
if(unlikely((options & RRDR_OPTION_NONZERO) && !(r->od[c] & RRDR_DIMENSION_NONZERO))) continue;
buffer_strcat(wb, pre_label);
buffer_strcat(wb, rd->name);
buffer_strcat(wb, post_label);
i++;
}
if(!i) {
buffer_strcat(wb, pre_label);
buffer_strcat(wb, "no data");
buffer_strcat(wb, post_label);
}
// print the begin of row data
buffer_strcat(wb, data_begin);
// if all dimensions are hidden, print a null
if(!i) {
buffer_strcat(wb, finish);
return;
}
long start = 0, end = rrdr_rows(r), step = 1;
if(!(options & RRDR_OPTION_REVERSED)) {
start = rrdr_rows(r) - 1;
end = -1;
step = -1;
}
// for each line in the array
calculated_number total = 1;
for(i = start; i != end ;i += step) {
calculated_number *cn = &r->v[ i * r->d ];
RRDR_VALUE_FLAGS *co = &r->o[ i * r->d ];
time_t now = r->t[i];
if(dates == JSON_DATES_JS) {
// generate the local date time
struct tm tmbuf, *tm = localtime_r(&now, &tmbuf);
if(!tm) { error("localtime_r() failed."); continue; }
if(likely(i != start)) buffer_strcat(wb, ",\n");
buffer_strcat(wb, pre_date);
if( options & RRDR_OPTION_OBJECTSROWS )
buffer_sprintf(wb, "%stime%s: ", kq, kq);
if(dates_with_new)
buffer_strcat(wb, "new ");
buffer_jsdate(wb, tm->tm_year + 1900, tm->tm_mon, tm->tm_mday, tm->tm_hour, tm->tm_min, tm->tm_sec);
buffer_strcat(wb, post_date);
if(row_annotations) {
// google supports one annotation per row
int annotation_found = 0;
for(c = 0, rd = r->st->dimensions; rd ;c++, rd = rd->next) {
if(unlikely(!(r->od[c] & RRDR_DIMENSION_SELECTED))) continue;
if(co[c] & RRDR_VALUE_RESET) {
buffer_strcat(wb, overflow_annotation);
annotation_found = 1;
break;
}
}
if(!annotation_found)
buffer_strcat(wb, normal_annotation);
}
}
else {
// print the timestamp of the line
if(likely(i != start)) buffer_strcat(wb, ",\n");
buffer_strcat(wb, pre_date);
if( options & RRDR_OPTION_OBJECTSROWS )
buffer_sprintf(wb, "%stime%s: ", kq, kq);
buffer_rrd_value(wb, (calculated_number)r->t[i]);
// in ms
if(options & RRDR_OPTION_MILLISECONDS) buffer_strcat(wb, "000");
buffer_strcat(wb, post_date);
}
int set_min_max = 0;
if(unlikely(options & RRDR_OPTION_PERCENTAGE)) {
total = 0;
for(c = 0, rd = r->st->dimensions; rd && c < r->d ;c++, rd = rd->next) {
calculated_number n = cn[c];
if(likely((options & RRDR_OPTION_ABSOLUTE) && n < 0))
n = -n;
total += n;
}
// prevent a division by zero
if(total == 0) total = 1;
set_min_max = 1;
}
// for each dimension
for(c = 0, rd = r->st->dimensions; rd && c < r->d ;c++, rd = rd->next) {
if(unlikely(r->od[c] & RRDR_DIMENSION_HIDDEN)) continue;
if(unlikely((options & RRDR_OPTION_NONZERO) && !(r->od[c] & RRDR_DIMENSION_NONZERO))) continue;
calculated_number n = cn[c];
buffer_strcat(wb, pre_value);
if( options & RRDR_OPTION_OBJECTSROWS )
buffer_sprintf(wb, "%s%s%s: ", kq, rd->name, kq);
if(co[c] & RRDR_VALUE_EMPTY) {
if(options & RRDR_OPTION_NULL2ZERO)
buffer_strcat(wb, "0");
else
buffer_strcat(wb, "null");
}
else {
if(unlikely((options & RRDR_OPTION_ABSOLUTE) && n < 0))
n = -n;
if(unlikely(options & RRDR_OPTION_PERCENTAGE)) {
n = n * 100 / total;
if(unlikely(set_min_max)) {
r->min = r->max = n;
set_min_max = 0;
}
if(n < r->min) r->min = n;
if(n > r->max) r->max = n;
}
buffer_rrd_value(wb, n);
}
buffer_strcat(wb, post_value);
}
buffer_strcat(wb, post_line);
}
buffer_strcat(wb, finish);
//info("RRD2JSON(): %s: END", r->st->id);
}
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