308 lines
5.4 KiB
Bash
308 lines
5.4 KiB
Bash
# functions for parsing and generating json
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_json_get_var() {
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local ___dest="$1"
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local ___var="$2"
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eval "$___dest=\"\$${JSON_PREFIX}$___var\""
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}
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_json_set_var() {
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local ___var="$1"
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local ___val="$2"
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eval "${JSON_PREFIX}$___var=\"\$___val\""
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}
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__jshn_raw_append() {
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local var="$1"
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local value="$2"
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local sep="${3:- }"
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eval "export -- \"$var=\${$var:+\${$var}\${value:+\$sep}}\$value\""
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}
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_jshn_append() {
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local __var="$1"
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local __value="$2"
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local __sep="${3:- }"
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local __old_val
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_json_get_var __old_val "$__var"
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__value="${__old_val:+$__old_val$__sep}$__value"
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_json_set_var "$__var" "$__value"
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}
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_json_export() {
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local __var="${JSON_PREFIX}$1"
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local __val="$2"
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export -- "$__var=$__val"
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}
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_json_add_key() {
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local table="$1"
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local var="$2"
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_jshn_append "KEYS_${table}" "$var"
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}
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_get_var() {
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local __dest="$1"
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local __var="$2"
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eval "$__dest=\"\$$__var\""
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}
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_set_var() {
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local __var="$1"
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local __val="$2"
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eval "$__var=\"\$__val\""
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}
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_json_inc() {
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local _var="$1"
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local _dest="$2"
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local _seq
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_json_get_var _seq "$_var"
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_seq="$((${_seq:-0} + 1))"
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_json_set_var "$_var" "$_seq"
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[ -n "$_dest" ] && _set_var "$_dest" "$_seq"
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}
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_json_stack_push() {
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local new_cur="$1"
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local cur
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_json_get_var cur JSON_CUR
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_jshn_append JSON_STACK "$cur"
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_json_set_var JSON_CUR "$new_cur"
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}
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_json_add_generic() {
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local type="$1"
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local var="$2"
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local val="$3"
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local cur="$4"
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[ -n "$cur" ] || _json_get_var cur JSON_CUR
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if [ "${cur%%[0-9]*}" = "JSON_ARRAY" ]; then
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_json_inc "SEQ_$cur" var
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else
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local name="${var//[^a-zA-Z0-9_]/_}"
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[[ "$name" == "$var" ]] || _json_export "NAME_${cur}_${name}" "$var"
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var="$name"
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fi
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_json_export "${cur}_$var" "$val"
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_json_export "TYPE_${cur}_$var" "$type"
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_jshn_append "JSON_UNSET" "${cur}_$var"
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_json_add_key "$cur" "$var"
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}
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_json_add_table() {
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local name="$1"
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local type="$2"
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local itype="$3"
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local cur new_cur
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local seq
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_json_get_var cur JSON_CUR
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_json_inc JSON_SEQ seq
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local table="JSON_$itype$seq"
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_json_export "UP_$table" "$cur"
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_json_export "KEYS_$table" ""
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[ "$itype" = "ARRAY" ] && _json_export "SEQ_$table" ""
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_json_stack_push "$table"
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_jshn_append "JSON_UNSET" "$table"
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_json_get_var new_cur JSON_CUR
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_json_add_generic "$type" "$1" "$new_cur" "$cur"
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}
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_json_close_table() {
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local stack new_stack
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_json_get_var stack JSON_STACK
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_json_set_var JSON_CUR "${stack##* }"
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new_stack="${stack% *}"
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[[ "$stack" == "$new_stack" ]] && new_stack=
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_json_set_var JSON_STACK "$new_stack"
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}
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json_set_namespace() {
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local _new="$1"
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local _old="$2"
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[ -n "$_old" ] && _set_var "$_old" "$JSON_PREFIX"
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JSON_PREFIX="$_new"
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}
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json_cleanup() {
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local unset
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_json_get_var unset JSON_UNSET
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for tmp in $unset JSON_VAR; do
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unset \
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${JSON_PREFIX}UP_$tmp \
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${JSON_PREFIX}KEYS_$tmp \
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${JSON_PREFIX}SEQ_$tmp \
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${JSON_PREFIX}TYPE_$tmp \
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${JSON_PREFIX}NAME_$tmp \
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${JSON_PREFIX}$tmp
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done
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unset \
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${JSON_PREFIX}JSON_SEQ \
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${JSON_PREFIX}JSON_STACK \
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${JSON_PREFIX}JSON_CUR \
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${JSON_PREFIX}JSON_UNSET
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}
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json_init() {
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json_cleanup
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export -- \
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${JSON_PREFIX}JSON_SEQ=0 \
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${JSON_PREFIX}JSON_STACK= \
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${JSON_PREFIX}JSON_CUR="JSON_VAR" \
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${JSON_PREFIX}JSON_UNSET="" \
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${JSON_PREFIX}KEYS_JSON_VAR= \
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${JSON_PREFIX}TYPE_JSON_VAR=
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}
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json_add_object() {
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_json_add_table "$1" object TABLE
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}
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json_close_object() {
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_json_close_table
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}
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json_add_array() {
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_json_add_table "$1" array ARRAY
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}
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json_close_array() {
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_json_close_table
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}
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json_add_string() {
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_json_add_generic string "$1" "$2"
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}
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json_add_int() {
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_json_add_generic int "$1" "$2"
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}
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json_add_boolean() {
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_json_add_generic boolean "$1" "$2"
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}
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json_add_double() {
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_json_add_generic double "$1" "$2"
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}
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# functions read access to json variables
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json_load() {
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eval `jshn -r "$1"`
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}
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json_dump() {
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jshn "$@" ${JSON_PREFIX:+-p "$JSON_PREFIX"} -w
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}
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json_get_type() {
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local __dest="$1"
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local __cur
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_json_get_var __cur JSON_CUR
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local __var="${JSON_PREFIX}TYPE_${__cur}_${2//[^a-zA-Z0-9_]/_}"
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eval "export -- \"$__dest=\${$__var}\"; [ -n \"\${$__var+x}\" ]"
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}
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json_get_keys() {
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local __dest="$1"
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local _tbl_cur
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if [ -n "$2" ]; then
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json_get_var _tbl_cur "$2"
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else
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_json_get_var _tbl_cur JSON_CUR
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fi
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local __var="${JSON_PREFIX}KEYS_${_tbl_cur}"
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eval "export -- \"$__dest=\${$__var}\"; [ -n \"\${$__var+x}\" ]"
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}
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json_get_values() {
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local _v_dest="$1"
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local _v_keys _v_val _select=
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unset "$_v_dest"
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[ -n "$2" ] && {
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json_select "$2"
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_select=1
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}
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json_get_keys _v_keys
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set -- $_v_keys
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while [ "$#" -gt 0 ]; do
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json_get_var _v_val "$1"
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__jshn_raw_append "$_v_dest" "$_v_val"
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shift
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done
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[ -n "$_select" ] && json_select ..
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return 0
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}
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json_get_var() {
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local __dest="$1"
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local __cur
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_json_get_var __cur JSON_CUR
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local __var="${JSON_PREFIX}${__cur}_${2//[^a-zA-Z0-9_]/_}"
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eval "export -- \"$__dest=\${$__var}\"; [ -n \"\${$__var+x}\" ]"
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}
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json_get_vars() {
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while [ "$#" -gt 0 ]; do
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local _var="$1"; shift
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json_get_var "$_var" "$_var"
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done
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}
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json_select() {
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local target="$1"
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local type
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local cur
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[ -z "$1" ] && {
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_json_set_var JSON_CUR "JSON_VAR"
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return 0
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}
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[[ "$1" == ".." ]] && {
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_json_get_var cur JSON_CUR
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_json_get_var cur "UP_$cur"
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_json_set_var JSON_CUR "$cur"
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return 0
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}
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json_get_type type "$target"
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case "$type" in
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object|array)
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json_get_var cur "$target"
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_json_set_var JSON_CUR "$cur"
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;;
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*)
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echo "WARNING: Variable '$target' does not exist or is not an array/object"
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return 1
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;;
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esac
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}
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json_is_a() {
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local type
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json_get_type type "$1"
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[ "$type" = "$2" ]
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}
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