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allow camel case conversion for json keys

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This commit is contained in:
Emil Lerch 2021-05-13 10:04:01 -07:00
parent 94266582b7
commit e76eb45003
Signed by: lobo
GPG Key ID: A7B62D657EF764F8
1 changed files with 17 additions and 1 deletions
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18
src/json.zig
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@ -1451,9 +1451,25 @@ pub const ParseOptions = struct {
UseLast, UseLast,
} = .Error, } = .Error,
allow_camel_case_conversion: bool = false,
allow_unknown_fields: bool = false, allow_unknown_fields: bool = false,
}; };
fn camelCaseComp(field: []const u8, key: []const u8, options: ParseOptions) !bool {
const allocator = options.allocator orelse return error.AllocatorRequired;
const source_key_camel_case = try allocator.dupeZ(u8, key);
defer allocator.free(source_key_camel_case);
var utf8_source_key = (std.unicode.Utf8View.init(source_key_camel_case) catch unreachable).iterator();
if (utf8_source_key.nextCodepoint()) |codepoint| {
if (codepoint >= 'A' and codepoint <= 'Z') {
// First codepoint is uppercase Latin char, which is all we're handling atm
source_key_camel_case[0] = source_key_camel_case[0] + ('a' - 'A');
// We will assume the target field is in camelCase
}
}
return std.mem.eql(u8, field, source_key_camel_case);
}
fn parseInternal(comptime T: type, token: Token, tokens: *TokenStream, options: ParseOptions) !T { fn parseInternal(comptime T: type, token: Token, tokens: *TokenStream, options: ParseOptions) !T {
switch (@typeInfo(T)) { switch (@typeInfo(T)) {
.Bool => { .Bool => {
@ -1556,7 +1572,7 @@ fn parseInternal(comptime T: type, token: Token, tokens: *TokenStream, options:
var found = false; var found = false;
inline for (structInfo.fields) |field, i| { inline for (structInfo.fields) |field, i| {
// TODO: using switches here segfault the compiler (#2727?) // TODO: using switches here segfault the compiler (#2727?)
if ((stringToken.escapes == .None and mem.eql(u8, field.name, key_source_slice)) or (stringToken.escapes == .Some and (field.name.len == stringToken.decodedLength() and encodesTo(field.name, key_source_slice)))) { if ((stringToken.escapes == .None and mem.eql(u8, field.name, key_source_slice)) or (stringToken.escapes == .Some and (field.name.len == stringToken.decodedLength() and encodesTo(field.name, key_source_slice))) or (stringToken.escapes == .None and options.allow_camel_case_conversion and try camelCaseComp(field.name, key_source_slice, options))) {
// if (switch (stringToken.escapes) { // if (switch (stringToken.escapes) {
// .None => mem.eql(u8, field.name, key_source_slice), // .None => mem.eql(u8, field.name, key_source_slice),
// .Some => (field.name.len == stringToken.decodedLength() and encodesTo(field.name, key_source_slice)), // .Some => (field.name.len == stringToken.decodedLength() and encodesTo(field.name, key_source_slice)),