From bb0c830b2a259b7c5ffa7c309ce9d3004f3c41a1 Mon Sep 17 00:00:00 2001
From: Hans Dedecker <dedeckeh@gmail.com>
Date: Thu, 1 Feb 2018 16:41:27 +0100
Subject: [PATCH] sh/jshn.sh: add json_for_each_item()

Function usefull to iterate through the different elements of an
array or object; the provided callback function is called for each
element which is passed the value, key and user provided arguments.
For field types different from array or object the callback is called
with the retrieved value.

Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
Acked-by: Jo-Philipp Wich <jo@mein.io>
---
 sh/jshn.sh | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/sh/jshn.sh b/sh/jshn.sh
index 66baccb..7b0155d 100644
--- a/sh/jshn.sh
+++ b/sh/jshn.sh
@@ -288,3 +288,28 @@ json_is_a() {
 	json_get_type type "$1"
 	[ "$type" = "$2" ]
 }
+
+json_for_each_item() {
+	[ "$#" -ge 2 ] || return 0
+	local function="$1"; shift
+	local target="$1"; shift
+	local type val
+
+	json_get_type type "$target"
+	case "$type" in
+		object|array)
+			local keys key
+			json_select "$target"
+			json_get_keys keys
+			for key in $keys; do
+				json_get_var val "$key"
+				eval "$function \"\$val\" \"\$key\" \"\$@\""
+			done
+			json_select ..
+		;;
+		*)
+			json_get_var val "$target"
+			eval "$function \"\$val\" \"\" \"\$@\""
+		;;
+	esac
+}