aboutsummaryrefslogtreecommitdiffstats
path: root/util/jsonschema.lua
blob: 97068c5c1e9236acd2cb2acd9ff9a65241768ff9 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
local schema_t = {xml_t = {}}

local type_e = schema_t.type_e

local type_validators = {}

local function simple_validate(schema, data)
	if schema == "object" and type(data) == "table" then
		return type(data) == "table" and (next(data) == nil or type((next(data, nil))) == "string")
	elseif schema == "array" and type(data) == "table" then
		return type(data) == "table" and (next(data) == nil or type((next(data, nil))) == "number")
	elseif schema == "integer" then
		return math.type(data) == schema
	else
		return type(data) == schema
	end
end

type_validators.string = function(schema, data)

	if type(data) == "string" then
		if schema.maxLength and #data > schema.maxLength then
			return false
		end
		if schema.minLength and #data < schema.minLength then
			return false
		end
		return true
	end
	return false
end

type_validators.number = function(schema, data)
	if schema.multipleOf and data % schema.multipleOf ~= 0 then
		return false
	end

	if schema.maximum and not (data <= schema.maximum) then
		return false
	end

	if schema.exclusiveMaximum and not (data < schema.exclusiveMaximum) then
		return false
	end

	if schema.minimum and not (data >= schema.minimum) then
		return false
	end

	if schema.exclusiveMinimum and not (data > schema.exclusiveMinimum) then
		return false
	end

	return true
end

type_validators.integer = type_validators.number

local function validate(schema, data)
	if type(schema) == "boolean" then
		return schema
	end
	if type(schema) == "string" then
		return simple_validate(schema, data)
	end
	if type(schema) == "table" then
		if schema.allOf then
			for _, sub in ipairs(schema.allOf) do
				if not validate(sub, data) then
					return false
				end
			end
			return true
		end

		if schema.oneOf then
			local valid = 0
			for _, sub in ipairs(schema.oneOf) do
				if validate(sub, data) then
					valid = valid + 1
				end
			end
			return valid == 1
		end

		if schema.anyOf then
			for _, sub in ipairs(schema.anyOf) do
				if validate(sub, data) then
					return true
				end
			end
			return false
		end

		if schema["not"] then
			if validate(schema["not"], data) then
				return false
			end
		end

		if schema["if"] then
			if validate(schema["if"], data) then
				if schema["then"] then
					return validate(schema["then"], data)
				end
			else
				if schema["else"] then
					return validate(schema["else"], data)
				end
			end
		end

		if not simple_validate(schema.type, data) then
			return false
		end

		if schema.const ~= nil and schema.const ~= data then
			return false
		end

		if schema.enum ~= nil then
			for _, v in ipairs(schema.enum) do
				if v == data then
					return true
				end
			end
			return false
		end

		local validator = type_validators[schema.type]
		if not validator then
			return true
		end

		return validator(schema, data)
	end
end

type_validators.table = function(schema, data)
	if type(data) == "table" then

		if schema.maxItems and #data > schema.maxItems then
			return false
		end

		if schema.minItems and #data < schema.minItems then
			return false
		end

		if schema.required then
			for _, k in ipairs(schema.required) do
				if data[k] == nil then
					return false
				end
			end
		end

		if schema.properties then
			for k, s in pairs(schema.properties) do
				if data[k] ~= nil then
					if not validate(s, data[k]) then
						return false
					end
				end
			end
		end

		if schema.additionalProperties then
			for k, v in pairs(data) do
				if type(k) == "string" then
					if not (schema.properties and schema.properties[k]) then
						if not validate(schema.additionalProperties, v) then
							return false
						end
					end
				end
			end
		elseif schema.properties then
			for k in pairs(data) do
				if type(k) == "string" then
					if schema.properties[k] == nil then
						return false
					end
				end
			end
		end

		if schema.uniqueItems then

			local values = {}
			for _, v in pairs(data) do
				if values[v] then
					return false
				end
				values[v] = true
			end
			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 = p + 1, #data do
				if not validate(schema.items, data[i]) then
					return false
				end
			end
		end

		if schema.contains then
			local found = false
			for i = 1, #data do
				if validate(schema.contains, data[i]) then
					found = true
					break
				end
			end
			if not found then
				return false
			end
		end

		return true
	end
	return false
end

type_validators.object = function(schema, data)
	if type(data) == "table" then
		for k in pairs(data) do
			if not (type(k) == "string") then
				return false
			end
		end

		return type_validators.table(schema, data)
	end
	return false
end

type_validators.array = function(schema, data)
	if type(data) == "table" then

		for i in pairs(data) do
			if not (type(i) == "number") then
				return false
			end
		end

		return type_validators.table(schema, data)
	end
	return false
end

return {validate = validate; schema_t = schema_t}