From da85d37bcb847acf53031811277392afe2a17ed2 Mon Sep 17 00:00:00 2001
From: Kim Alvefur <zash@zash.se>
Date: Tue, 9 Mar 2021 02:36:08 +0100
Subject: util.jsonschema: Implement the "prefixItems" keyword

This may have been what got me confused about "items" being an array.
---
 util/jsonschema.lua | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

(limited to 'util')

diff --git a/util/jsonschema.lua b/util/jsonschema.lua
index 4ace2d2d..97068c5c 100644
--- a/util/jsonschema.lua
+++ b/util/jsonschema.lua
@@ -197,8 +197,19 @@ type_validators.table = function(schema, data)
 			return true
 		end
 
+		local p = 0
+		if schema.prefixItems then
+			for i, s in ipairs(schema.prefixItems) do
+				if validate(s, data[i]) then
+					p = i
+				else
+					return false
+				end
+			end
+		end
+
 		if schema.items then
-			for i = 1, #data do
+			for i = p + 1, #data do
 				if not validate(schema.items, data[i]) then
 					return false
 				end
-- 
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