mirror of
https://github.com/bellard/quickjs.git
synced 2024-12-12 09:44:33 +08:00
Improve Date.parse
- rewrite Date.parse() with separate parsers - return `NaN` for out of bounds field values as specified - accept up to 9 decimals for millisecond fraction but truncate at 3 - accept many more alternative date/time formats - add test cases in tests/test_builtin.js
This commit is contained in:
parent
6428ce0c8b
commit
78db49cf95
543
quickjs.c
543
quickjs.c
@ -49765,7 +49765,7 @@ static JSValue js_Date_UTC(JSContext *ctx, JSValueConst this_val,
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int argc, JSValueConst *argv)
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{
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// UTC(y, mon, d, h, m, s, ms)
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double fields[] = { 0, 0, 1, 0, 0, 0, 0 };
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double fields[9] = { 0, 0, 1, 0, 0, 0, 0, 0, 0 };
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int i, n;
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double a;
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@ -49786,145 +49786,338 @@ static JSValue js_Date_UTC(JSContext *ctx, JSValueConst this_val,
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return JS_NewFloat64(ctx, set_date_fields(fields, 0));
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}
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static void string_skip_spaces(JSString *sp, int *pp) {
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while (*pp < sp->len && string_get(sp, *pp) == ' ')
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/* Date string parsing */
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static BOOL string_skip_char(const uint8_t *sp, int *pp, int c) {
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if (sp[*pp] == c) {
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*pp += 1;
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return TRUE;
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} else {
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return FALSE;
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}
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}
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/* skip spaces, update offset */
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static void string_skip_spaces(const uint8_t *sp, int *pp) {
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while (sp[*pp] == ' ')
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*pp += 1;
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}
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static void string_skip_non_spaces(JSString *sp, int *pp) {
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while (*pp < sp->len && string_get(sp, *pp) != ' ')
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/* skip dashes dots and commas */
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static void string_skip_separators(const uint8_t *sp, int *pp) {
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int c;
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while ((c = sp[*pp]) == '-' || c == '.' || c == ',')
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*pp += 1;
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}
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/* parse a numeric field with an optional sign if accept_sign is TRUE */
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static int string_get_digits(JSString *sp, int *pp, int64_t *pval) {
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int64_t v = 0;
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/* skip non spaces, update offset */
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static void string_skip_non_spaces(const uint8_t *sp, int *pp) {
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while (sp[*pp] != '\0' && sp[*pp] != ' ')
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*pp += 1;
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}
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/* parse a numeric field (max_digits = 0 -> no maximum) */
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static BOOL string_get_digits(const uint8_t *sp, int *pp, int *pval,
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int min_digits, int max_digits)
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{
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int v = 0;
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int c, p = *pp, p_start;
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if (p >= sp->len)
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return -1;
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p_start = p;
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while (p < sp->len) {
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c = string_get(sp, p);
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if (!(c >= '0' && c <= '9')) {
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if (p == p_start)
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return -1;
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else
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break;
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}
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while ((c = sp[p]) >= '0' && c <= '9') {
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v = v * 10 + c - '0';
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p++;
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if (p - p_start == max_digits)
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break;
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}
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if (p - p_start < min_digits)
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return FALSE;
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*pval = v;
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*pp = p;
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return 0;
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return TRUE;
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}
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static int string_get_signed_digits(JSString *sp, int *pp, int64_t *pval) {
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int res, sgn, p = *pp;
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static BOOL string_get_milliseconds(const uint8_t *sp, int *pp, int *pval) {
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/* parse optional fractional part as milliseconds and truncate. */
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/* spec does not indicate which rounding should be used */
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int mul = 1000, ms = 0, c, p_start, p = *pp;
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if (p >= sp->len)
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return -1;
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sgn = string_get(sp, p);
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if (sgn == '-' || sgn == '+')
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c = sp[p];
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if (c == '.' || c == ',') {
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p++;
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res = string_get_digits(sp, &p, pval);
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if (res == 0 && sgn == '-') {
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if (*pval == 0)
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return -1; // reject negative zero
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*pval = -*pval;
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}
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*pp = p;
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return res;
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}
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/* parse a fixed width numeric field */
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static int string_get_fixed_width_digits(JSString *sp, int *pp, int n, int64_t *pval) {
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int64_t v = 0;
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int i, c, p = *pp;
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for(i = 0; i < n; i++) {
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if (p >= sp->len)
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return -1;
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c = string_get(sp, p);
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if (!(c >= '0' && c <= '9'))
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return -1;
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v = v * 10 + c - '0';
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p++;
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}
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*pval = v;
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*pp = p;
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return 0;
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}
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static int string_get_milliseconds(JSString *sp, int *pp, int64_t *pval) {
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/* parse milliseconds as a fractional part, round to nearest */
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/* XXX: the spec does not indicate which rounding should be used */
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int mul = 1000, ms = 0, p = *pp, c, p_start;
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if (p >= sp->len)
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return -1;
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p_start = p;
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while (p < sp->len) {
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c = string_get(sp, p);
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if (!(c >= '0' && c <= '9')) {
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if (p == p_start)
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return -1;
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else
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p_start = p;
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while ((c = sp[p]) >= '0' && c <= '9') {
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ms += (c - '0') * (mul /= 10);
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p++;
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if (p - p_start == 9)
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break;
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}
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if (mul == 1 && c >= '5')
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ms += 1;
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ms += (c - '0') * (mul /= 10);
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p++;
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if (p > p_start) {
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/* only consume the separator if digits are present */
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*pval = ms;
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*pp = p;
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}
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}
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*pval = ms;
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*pp = p;
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return 0;
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return TRUE;
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}
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static BOOL string_get_timezone(const uint8_t *sp, int *pp, int *tzp) {
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int tz = 0, sgn, hh, mm, p = *pp;
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static int find_abbrev(JSString *sp, int p, const char *list, int count) {
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sgn = sp[p];
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if (sgn == '+' || sgn == '-') {
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p++;
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if (!string_get_digits(sp, &p, &hh, 2, 2))
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return FALSE;
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string_skip_char(sp, &p, ':'); /* optional separator */
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if (!string_get_digits(sp, &p, &mm, 2, 2))
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return FALSE;
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if (hh > 23 || mm > 59)
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return FALSE;
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tz = hh * 60 + mm;
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if (sgn != '+')
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tz = -tz;
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} else
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if (sgn == 'Z') {
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p++;
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} else {
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return FALSE;
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}
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*pp = p;
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*tzp = tz;
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return TRUE;
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}
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static BOOL string_match(const uint8_t *sp, int *pp, const char *s) {
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int p = *pp;
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while (*s != '\0') {
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if (sp[p] != (uint8_t)*s++)
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return FALSE;
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p++;
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}
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*pp = p;
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return TRUE;
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}
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static int find_abbrev(const uint8_t *sp, int p, const char *list, int count) {
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int n, i;
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if (p + 3 <= sp->len) {
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for (n = 0; n < count; n++) {
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for (i = 0; i < 3; i++) {
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if (string_get(sp, p + i) != month_names[n * 3 + i])
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goto next;
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}
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return n;
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next:;
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for (n = 0; n < count; n++) {
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for (i = 0;; i++) {
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if (sp[p + i] != (uint8_t)month_names[n * 3 + i])
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break;
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if (i == 2)
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return n;
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}
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}
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return -1;
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}
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static int string_get_month(JSString *sp, int *pp, int64_t *pval) {
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static BOOL string_get_month(const uint8_t *sp, int *pp, int *pval) {
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int n;
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string_skip_spaces(sp, pp);
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n = find_abbrev(sp, *pp, month_names, 12);
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if (n < 0)
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return -1;
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return FALSE;
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*pval = n;
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*pval = n + 1;
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*pp += 3;
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return 0;
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return TRUE;
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}
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/* parse toISOString format */
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static BOOL js_date_parse_isostring(const uint8_t *sp, int fields[9], BOOL *is_local) {
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int sgn, i, p = 0;
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/* initialize fields to the beginning of the Epoch */
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for (i = 0; i < 9; i++) {
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fields[i] = (i == 2);
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}
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*is_local = FALSE;
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/* year is either yyyy digits or [+-]yyyyyy */
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sgn = sp[p];
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if (sgn == '-' || sgn == '+') {
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p++;
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if (!string_get_digits(sp, &p, &fields[0], 6, 6))
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return FALSE;
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if (sgn == '-') {
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if (fields[0] == 0)
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return FALSE; // reject -000000
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fields[0] = -fields[0];
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}
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} else {
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if (!string_get_digits(sp, &p, &fields[0], 4, 4))
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return FALSE;
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}
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if (string_skip_char(sp, &p, '-')) {
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if (!string_get_digits(sp, &p, &fields[1], 2, 2)) /* month */
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return FALSE;
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if (fields[1] < 1)
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return FALSE;
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fields[1] -= 1;
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if (string_skip_char(sp, &p, '-')) {
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if (!string_get_digits(sp, &p, &fields[2], 2, 2)) /* day */
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return FALSE;
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if (fields[2] < 1)
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return FALSE;
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}
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}
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if (string_skip_char(sp, &p, 'T')) {
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*is_local = TRUE;
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if (!string_get_digits(sp, &p, &fields[3], 2, 2) /* hour */
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|| !string_skip_char(sp, &p, ':')
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|| !string_get_digits(sp, &p, &fields[4], 2, 2)) /* minute */
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return FALSE;
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if (string_skip_char(sp, &p, ':')) {
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if (!string_get_digits(sp, &p, &fields[5], 2, 2)) /* second */
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return FALSE;
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string_get_milliseconds(sp, &p, &fields[6]);
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}
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}
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/* parse the time zone offset if present: [+-]HH:mm or [+-]HHmm */
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if (sp[p]) {
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*is_local = FALSE;
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if (!string_get_timezone(sp, &p, &fields[8]))
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return FALSE;
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}
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/* error if extraneous characters */
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return sp[p] == '\0';
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}
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/* parse toString, toUTCString and other formats */
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static BOOL js_date_parse_otherstring(const uint8_t *sp, int fields[9], BOOL *is_local) {
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int c, i, val, p = 0, p_start;
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int num[3];
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BOOL has_year = FALSE;
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BOOL has_mon = FALSE;
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BOOL has_time = FALSE;
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int num_index = 0;
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/* initialize fields to the beginning of 2001-01-01 */
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fields[0] = 2001;
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fields[1] = 1;
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fields[2] = 1;
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for (i = 3; i < 9; i++) {
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fields[i] = 0;
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}
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*is_local = TRUE;
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while (sp[p] != '\0') {
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string_skip_spaces(sp, &p);
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p_start = p;
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if ((c = sp[p]) == '+' || c == '-') {
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if (has_time && string_get_timezone(sp, &p, &fields[8])) {
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*is_local = FALSE;
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} else {
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p++;
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if (string_get_digits(sp, &p, &val, 1, 9)) {
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if (c == '-') {
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if (val == 0)
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return FALSE;
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val = -val;
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}
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fields[0] = val;
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has_year = TRUE;
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}
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}
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} else
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if (string_get_digits(sp, &p, &val, 1, 9)) {
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if (string_skip_char(sp, &p, ':')) {
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/* time part */
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fields[3] = val;
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if (!string_get_digits(sp, &p, &fields[4], 1, 2))
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return FALSE;
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if (string_skip_char(sp, &p, ':')) {
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if (!string_get_digits(sp, &p, &fields[5], 1, 2))
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return FALSE;
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string_get_milliseconds(sp, &p, &fields[6]);
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}
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has_time = TRUE;
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} else {
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if (p - p_start > 2) {
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fields[0] = val;
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has_year = TRUE;
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} else
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if (val < 1 || val > 31) {
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fields[0] = val + (val < 100) * 1900;
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has_year = TRUE;
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} else {
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if (num_index == 3)
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return FALSE;
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num[num_index++] = val;
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}
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}
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} else
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if (string_get_month(sp, &p, &fields[1])) {
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has_mon = TRUE;
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} else
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if (c == 'Z') {
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*is_local = FALSE;
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p++;
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continue;
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} else
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if (string_match(sp, &p, "GMT") || string_match(sp, &p, "UTC")) {
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*is_local = FALSE;
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continue;
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} else {
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/* skip a word */
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string_skip_non_spaces(sp, &p);
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continue;
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}
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string_skip_separators(sp, &p);
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}
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if (num_index + has_year + has_mon > 3)
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return FALSE;
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switch (num_index) {
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case 0:
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if (!has_year)
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return FALSE;
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break;
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case 1:
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if (has_mon)
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fields[2] = num[0];
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else
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fields[1] = num[0];
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break;
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case 2:
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if (has_year) {
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fields[1] = num[0];
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fields[2] = num[1];
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} else
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if (has_mon) {
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fields[0] = num[1] + (num[1] < 100) * 1900;
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fields[2] = num[0];
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} else {
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fields[1] = num[0];
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fields[2] = num[1];
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}
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break;
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case 3:
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fields[0] = num[2] + (num[2] < 100) * 1900;
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fields[1] = num[0];
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fields[2] = num[1];
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break;
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default:
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return FALSE;
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}
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if (fields[1] < 1 || fields[2] < 1)
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return FALSE;
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fields[1] -= 1;
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return TRUE;
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}
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static JSValue js_Date_parse(JSContext *ctx, JSValueConst this_val,
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int argc, JSValueConst *argv)
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{
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// parse(s)
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JSValue s, rv;
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int64_t fields[] = { 0, 1, 1, 0, 0, 0, 0 };
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double fields1[7];
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int64_t tz, hh, mm;
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int fields[9];
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double fields1[9];
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double d;
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int p, i, c, sgn, l;
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int i, c;
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JSString *sp;
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uint8_t buf[128];
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BOOL is_local;
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rv = JS_NAN;
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@ -49934,145 +50127,33 @@ static JSValue js_Date_parse(JSContext *ctx, JSValueConst this_val,
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return JS_EXCEPTION;
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sp = JS_VALUE_GET_STRING(s);
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p = 0;
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if (p < sp->len && (((c = string_get(sp, p)) >= '0' && c <= '9') || c == '+' || c == '-')) {
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/* ISO format */
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/* year field can be negative */
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if (string_get_signed_digits(sp, &p, &fields[0]))
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goto done;
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for (i = 1; i < 7; i++) {
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if (p >= sp->len)
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break;
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switch(i) {
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case 1:
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case 2:
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c = '-';
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break;
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case 3:
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c = 'T';
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break;
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case 4:
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case 5:
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c = ':';
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break;
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case 6:
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c = '.';
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break;
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}
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if (string_get(sp, p) != c)
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break;
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p++;
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if (i == 6) {
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if (string_get_milliseconds(sp, &p, &fields[i]))
|
||||
goto done;
|
||||
} else {
|
||||
if (string_get_digits(sp, &p, &fields[i]))
|
||||
goto done;
|
||||
}
|
||||
/* convert the string as a byte array */
|
||||
for (i = 0; i < sp->len && i < (int)countof(buf) - 1; i++) {
|
||||
c = string_get(sp, i);
|
||||
if (c > 255)
|
||||
c = (c == 0x2212) ? '-' : 'x';
|
||||
buf[i] = c;
|
||||
}
|
||||
buf[i] = '\0';
|
||||
if (js_date_parse_isostring(buf, fields, &is_local)
|
||||
|| js_date_parse_otherstring(buf, fields, &is_local)) {
|
||||
static int const field_max[6] = { 0, 11, 31, 24, 59, 59 };
|
||||
BOOL valid = TRUE;
|
||||
/* check field maximum values */
|
||||
for (i = 1; i < 6; i++) {
|
||||
if (fields[i] > field_max[i])
|
||||
valid = FALSE;
|
||||
}
|
||||
/* no time: UTC by default */
|
||||
is_local = (i > 3);
|
||||
fields[1] -= 1;
|
||||
|
||||
/* parse the time zone offset if present: [+-]HH:mm or [+-]HHmm */
|
||||
tz = 0;
|
||||
if (p < sp->len) {
|
||||
sgn = string_get(sp, p);
|
||||
if (sgn == '+' || sgn == '-') {
|
||||
p++;
|
||||
l = sp->len - p;
|
||||
if (l != 4 && l != 5)
|
||||
goto done;
|
||||
if (string_get_fixed_width_digits(sp, &p, 2, &hh))
|
||||
goto done;
|
||||
if (l == 5) {
|
||||
if (string_get(sp, p) != ':')
|
||||
goto done;
|
||||
p++;
|
||||
}
|
||||
if (string_get_fixed_width_digits(sp, &p, 2, &mm))
|
||||
goto done;
|
||||
tz = hh * 60 + mm;
|
||||
if (sgn == '-')
|
||||
tz = -tz;
|
||||
is_local = FALSE;
|
||||
} else if (sgn == 'Z') {
|
||||
p++;
|
||||
is_local = FALSE;
|
||||
} else {
|
||||
goto done;
|
||||
}
|
||||
/* error if extraneous characters */
|
||||
if (p != sp->len)
|
||||
goto done;
|
||||
}
|
||||
} else {
|
||||
/* toString or toUTCString format */
|
||||
/* skip the day of the week */
|
||||
string_skip_non_spaces(sp, &p);
|
||||
string_skip_spaces(sp, &p);
|
||||
if (p >= sp->len)
|
||||
goto done;
|
||||
c = string_get(sp, p);
|
||||
if (c >= '0' && c <= '9') {
|
||||
/* day of month first */
|
||||
if (string_get_digits(sp, &p, &fields[2]))
|
||||
goto done;
|
||||
if (string_get_month(sp, &p, &fields[1]))
|
||||
goto done;
|
||||
} else {
|
||||
/* month first */
|
||||
if (string_get_month(sp, &p, &fields[1]))
|
||||
goto done;
|
||||
string_skip_spaces(sp, &p);
|
||||
if (string_get_digits(sp, &p, &fields[2]))
|
||||
goto done;
|
||||
}
|
||||
/* year */
|
||||
string_skip_spaces(sp, &p);
|
||||
if (string_get_signed_digits(sp, &p, &fields[0]))
|
||||
goto done;
|
||||
|
||||
/* hour, min, seconds */
|
||||
string_skip_spaces(sp, &p);
|
||||
for(i = 0; i < 3; i++) {
|
||||
if (i == 1 || i == 2) {
|
||||
if (p >= sp->len)
|
||||
goto done;
|
||||
if (string_get(sp, p) != ':')
|
||||
goto done;
|
||||
p++;
|
||||
}
|
||||
if (string_get_digits(sp, &p, &fields[3 + i]))
|
||||
goto done;
|
||||
}
|
||||
// XXX: parse optional milliseconds?
|
||||
|
||||
/* parse the time zone offset if present: [+-]HHmm */
|
||||
is_local = FALSE;
|
||||
tz = 0;
|
||||
for (tz = 0; p < sp->len; p++) {
|
||||
sgn = string_get(sp, p);
|
||||
if (sgn == '+' || sgn == '-') {
|
||||
p++;
|
||||
if (string_get_fixed_width_digits(sp, &p, 2, &hh))
|
||||
goto done;
|
||||
if (string_get_fixed_width_digits(sp, &p, 2, &mm))
|
||||
goto done;
|
||||
tz = hh * 60 + mm;
|
||||
if (sgn == '-')
|
||||
tz = -tz;
|
||||
break;
|
||||
}
|
||||
/* special case 24:00:00.000 */
|
||||
if (fields[3] == 24 && (fields[4] | fields[5] | fields[6]))
|
||||
valid = FALSE;
|
||||
if (valid) {
|
||||
for(i = 0; i < 7; i++)
|
||||
fields1[i] = fields[i];
|
||||
d = set_date_fields(fields1, is_local) - fields[8] * 60000;
|
||||
rv = JS_NewFloat64(ctx, d);
|
||||
}
|
||||
}
|
||||
for(i = 0; i < 7; i++)
|
||||
fields1[i] = fields[i];
|
||||
d = set_date_fields(fields1, is_local) - tz * 60000;
|
||||
rv = JS_NewFloat64(ctx, d);
|
||||
|
||||
done:
|
||||
JS_FreeValue(ctx, s);
|
||||
return rv;
|
||||
}
|
||||
|
@ -540,28 +540,65 @@ function test_date()
|
||||
// is not a valid instance of this format.
|
||||
// Hence the fractional part after . should have 3 digits and how
|
||||
// a different number of digits is handled is implementation defined.
|
||||
var d = new Date(1506098258091), a, s;
|
||||
assert(Date.parse(""), NaN);
|
||||
assert(Date.parse("2000"), 946684800000);
|
||||
assert(Date.parse("2000-01"), 946684800000);
|
||||
assert(Date.parse("2000-01-01"), 946684800000);
|
||||
//assert(Date.parse("2000-01-01T"), NaN);
|
||||
//assert(Date.parse("2000-01-01T00Z"), NaN);
|
||||
assert(Date.parse("2000-01-01T00:00Z"), 946684800000);
|
||||
assert(Date.parse("2000-01-01T00:00:00Z"), 946684800000);
|
||||
assert(Date.parse("2000-01-01T00:00:00.1Z"), 946684800100);
|
||||
assert(Date.parse("2000-01-01T00:00:00.10Z"), 946684800100);
|
||||
assert(Date.parse("2000-01-01T00:00:00.100Z"), 946684800100);
|
||||
assert(Date.parse("2000-01-01T00:00:00.1000Z"), 946684800100);
|
||||
assert(Date.parse("2000-01-01T00:00:00+00:00"), 946684800000);
|
||||
//assert(Date.parse("2000-01-01T00:00:00+00:30"), 946686600000);
|
||||
var d = new Date("2000T00:00"); // Jan 1st 2000, 0:00:00 local time
|
||||
assert(typeof d === 'object' && d.toString() != 'Invalid Date');
|
||||
assert((new Date('Jan 1 2000')).toISOString(),
|
||||
d.toISOString());
|
||||
assert((new Date('Jan 1 2000 00:00')).toISOString(),
|
||||
d.toISOString());
|
||||
assert((new Date('Jan 1 2000 00:00:00')).toISOString(),
|
||||
d.toISOString());
|
||||
assert((new Date('Jan 1 2000 00:00:00 GMT+0100')).toISOString(),
|
||||
'1999-12-31T23:00:00.000Z');
|
||||
assert((new Date('Jan 1 2000 00:00:00 GMT+0200')).toISOString(),
|
||||
'1999-12-31T22:00:00.000Z');
|
||||
assert((new Date('Sat Jan 1 2000')).toISOString(),
|
||||
d.toISOString());
|
||||
assert((new Date('Sat Jan 1 2000 00:00')).toISOString(),
|
||||
d.toISOString());
|
||||
assert((new Date('Sat Jan 1 2000 00:00:00')).toISOString(),
|
||||
d.toISOString());
|
||||
assert((new Date('Sat Jan 1 2000 00:00:00 GMT+0100')).toISOString(),
|
||||
'1999-12-31T23:00:00.000Z');
|
||||
assert((new Date('Sat Jan 1 2000 00:00:00 GMT+0200')).toISOString(),
|
||||
'1999-12-31T22:00:00.000Z');
|
||||
|
||||
var d = new Date(1506098258091);
|
||||
assert(d.toISOString(), "2017-09-22T16:37:38.091Z");
|
||||
d.setUTCHours(18, 10, 11);
|
||||
assert(d.toISOString(), "2017-09-22T18:10:11.091Z");
|
||||
a = Date.parse(d.toISOString());
|
||||
var a = Date.parse(d.toISOString());
|
||||
assert((new Date(a)).toISOString(), d.toISOString());
|
||||
s = new Date("2020-01-01T01:01:01.1Z").toISOString();
|
||||
assert(s, "2020-01-01T01:01:01.100Z");
|
||||
s = new Date("2020-01-01T01:01:01.12Z").toISOString();
|
||||
assert(s, "2020-01-01T01:01:01.120Z");
|
||||
s = new Date("2020-01-01T01:01:01.123Z").toISOString();
|
||||
assert(s, "2020-01-01T01:01:01.123Z");
|
||||
s = new Date("2020-01-01T01:01:01.1234Z").toISOString();
|
||||
assert(s, "2020-01-01T01:01:01.123Z");
|
||||
s = new Date("2020-01-01T01:01:01.12345Z").toISOString();
|
||||
assert(s, "2020-01-01T01:01:01.123Z");
|
||||
s = new Date("2020-01-01T01:01:01.1235Z").toISOString();
|
||||
assert(s == "2020-01-01T01:01:01.124Z" || // QuickJS
|
||||
s == "2020-01-01T01:01:01.123Z"); // nodeJS
|
||||
s = new Date("2020-01-01T01:01:01.9999Z").toISOString();
|
||||
assert(s == "2020-01-01T01:01:02.000Z" || // QuickJS
|
||||
s == "2020-01-01T01:01:01.999Z"); // nodeJS
|
||||
|
||||
assert((new Date("2020-01-01T01:01:01.123Z")).toISOString(),
|
||||
"2020-01-01T01:01:01.123Z");
|
||||
/* implementation defined behavior */
|
||||
assert((new Date("2020-01-01T01:01:01.1Z")).toISOString(),
|
||||
"2020-01-01T01:01:01.100Z");
|
||||
assert((new Date("2020-01-01T01:01:01.12Z")).toISOString(),
|
||||
"2020-01-01T01:01:01.120Z");
|
||||
assert((new Date("2020-01-01T01:01:01.1234Z")).toISOString(),
|
||||
"2020-01-01T01:01:01.123Z");
|
||||
assert((new Date("2020-01-01T01:01:01.12345Z")).toISOString(),
|
||||
"2020-01-01T01:01:01.123Z");
|
||||
assert((new Date("2020-01-01T01:01:01.1235Z")).toISOString(),
|
||||
"2020-01-01T01:01:01.123Z");
|
||||
assert((new Date("2020-01-01T01:01:01.9999Z")).toISOString(),
|
||||
"2020-01-01T01:01:01.999Z");
|
||||
|
||||
assert(Date.UTC(NaN), NaN);
|
||||
assert(Date.UTC(2017, NaN), NaN);
|
||||
|
Loading…
Reference in New Issue
Block a user