135 lines
2.6 KiB
Bash
135 lines
2.6 KiB
Bash
# functions for parsing and generating json
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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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eval "export -- \"$var=\${$var:+\${$var}\${value:+\$sep}}\$value\""
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}
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json_init() {
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[ -n "$JSON_UNSET" ] && eval "unset $JSON_UNSET"
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export -- JSON_SEQ=0 JSON_STACK= JSON_CUR="JSON_VAR" JSON_UNSET="" KEYS_JSON_VAR= TYPE_JSON_VAR=
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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:-$JSON_CUR}"
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if [ "${cur%%[0-9]*}" = "JSON_ARRAY" ]; then
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eval "local aseq=\"\${SEQ_$cur}\""
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var=$(( ${aseq:-0} + 1 ))
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export -- "SEQ_$cur=$var"
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else
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local name="$(echo -n "$var" | tr -C '[a-zA-Z0-9_]' _)"
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[[ "$name" == "$var" ]] || export -- "NAME_${cur}_${name}=$var"
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var="$name"
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fi
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export -- "${cur}_$var=$val"
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export -- "TYPE_${cur}_$var=$type"
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jshn_append JSON_UNSET "${cur}_$var TYPE_${cur}_$var"
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jshn_append "KEYS_${cur}" "$var"
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}
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json_add_table() {
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local TYPE="$1"
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JSON_SEQ=$(($JSON_SEQ + 1))
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jshn_append JSON_STACK "$JSON_CUR"
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local table="JSON_$TYPE$JSON_SEQ"
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export -- "UP_$table=$JSON_CUR"
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export -- "KEYS_$table="
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jshn_append JSON_UNSET "KEYS_$table UP_$table"
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[ "$TYPE" = "ARRAY" ] && jshn_append JSON_UNSET "SEQ_$table"
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JSON_CUR="$table"
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}
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json_add_object() {
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local cur="$JSON_CUR"
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json_add_table TABLE
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json_add_generic object "$1" "$JSON_CUR" "$cur"
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}
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json_close_object() {
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local oldstack="$JSON_STACK"
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JSON_CUR="${JSON_STACK##* }"
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JSON_STACK="${JSON_STACK% *}"
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[[ "$oldstack" == "$JSON_STACK" ]] && JSON_STACK=
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}
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json_add_array() {
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local cur="$JSON_CUR"
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json_add_table ARRAY
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json_add_generic array "$1" "$JSON_CUR" "$cur"
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}
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json_close_array() {
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json_close_object
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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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# functions read access to json variables
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json_load() {
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eval `jshn -r "$1"`
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}
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json_dump() {
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jshn "$@" -w
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}
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json_get_type() {
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local dest="$1"
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local var="$2"
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eval "export -- \"$dest=\${TYPE_${JSON_CUR}_$var}\""
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}
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json_get_var() {
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local dest="$1"
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local var="$(echo -n "$2" | tr -C '[a-zA-Z0-9_]' _)"
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eval "export -- \"$dest=\${${JSON_CUR}_$var}\""
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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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[ -z "$1" ] && {
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JSON_CUR="JSON_VAR"
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return
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}
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[[ "$1" == ".." ]] && {
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eval "JSON_CUR=\"\${UP_$JSON_CUR}\""
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return;
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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 JSON_CUR "$target"
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;;
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*)
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echo "WARNING: Variable '$target' does not exist or is not an array/object"
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;;
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esac
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}
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