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const std = @import("std");
const Allocator = std.mem.Allocator;
const ParseOptions = @import("static.zig").ParseOptions;
const innerParse = @import("static.zig").innerParse;
const innerParseFromValue = @import("static.zig").innerParseFromValue;
const Value = @import("dynamic.zig").Value;
/// A thin wrapper around `std.StringArrayHashMapUnmanaged` that implements
/// `jsonParse`, `jsonParseFromValue`, and `jsonStringify`.
/// This is useful when your JSON schema has an object with arbitrary data keys
/// instead of comptime-known struct field names.
pub fn ArrayHashMap(comptime T: type) type {
return struct {
map: std.StringArrayHashMapUnmanaged(T) = .empty,
pub fn deinit(self: *@This(), allocator: Allocator) void {
self.map.deinit(allocator);
}
pub fn jsonParse(allocator: Allocator, source: anytype, options: ParseOptions) !@This() {
var map: std.StringArrayHashMapUnmanaged(T) = .empty;
errdefer map.deinit(allocator);
if (.object_begin != try source.next()) return error.UnexpectedToken;
while (true) {
const token = try source.nextAlloc(allocator, options.allocate.?);
switch (token) {
inline .string, .allocated_string => |k| {
const gop = try map.getOrPut(allocator, k);
if (gop.found_existing) {
switch (options.duplicate_field_behavior) {
.use_first => {
// Parse and ignore the redundant value.
// We don't want to skip the value, because we want type checking.
_ = try innerParse(T, allocator, source, options);
continue;
},
.@"error" => return error.DuplicateField,
.use_last => {},
}
}
gop.value_ptr.* = try innerParse(T, allocator, source, options);
},
.object_end => break,
else => unreachable,
}
}
return .{ .map = map };
}
pub fn jsonParseFromValue(allocator: Allocator, source: Value, options: ParseOptions) !@This() {
if (source != .object) return error.UnexpectedToken;
var map: std.StringArrayHashMapUnmanaged(T) = .empty;
errdefer map.deinit(allocator);
var it = source.object.iterator();
while (it.next()) |kv| {
try map.put(allocator, kv.key_ptr.*, try innerParseFromValue(T, allocator, kv.value_ptr.*, options));
}
return .{ .map = map };
}
pub fn jsonStringify(self: @This(), jws: anytype) !void {
try jws.beginObject();
var it = self.map.iterator();
while (it.next()) |kv| {
try jws.objectField(kv.key_ptr.*);
try jws.write(kv.value_ptr.*);
}
try jws.endObject();
}
};
}
test {
_ = @import("hashmap_test.zig");
}
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