feat: added changes for seq id changes #9
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,25 @@ | ||
| // | ||
| // BSONOIDGenerator.h | ||
| // ContentstackPersistence | ||
| // | ||
| // Created by Vikram Kalta on 13/02/2024. | ||
| // Copyright © 2024 Contentstack. All rights reserved. | ||
| // | ||
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| #ifndef BSONOIDGenerator_h | ||
| #define BSONOIDGenerator_h | ||
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| #import <Foundation/Foundation.h> | ||
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| typedef union { | ||
| char bytes[12]; | ||
| int ints[3]; | ||
| } bson_oid_t; | ||
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| @interface BSONOIDGenerator : NSObject | ||
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| + (NSString *)generate:(NSInteger)timestamp; | ||
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| @end | ||
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| #endif /* BSONOIDGenerator_h */ |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,103 @@ | ||
| // | ||
| // BSONOIDGenerator.m | ||
| // ContentstackPersistence | ||
| // | ||
| // Created by Vikram Kalta on 13/02/2024. | ||
| // Copyright © 2024 Contentstack. All rights reserved. | ||
| // | ||
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| #import <Foundation/Foundation.h> | ||
| #import <CommonCrypto/CommonDigest.h> | ||
| #import "BSONOIDGenerator.h" | ||
| #import <UIKit/UIKit.h> | ||
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| @implementation BSONOIDGenerator | ||
| static int _incr = 0; | ||
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| + (NSString *) generate:(NSInteger)timestamp { | ||
| int i = _incr++; | ||
| bson_oid_t *oid = malloc(sizeof(bson_oid_t)); | ||
| time_t t = time(NULL); | ||
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| // Grab the PID | ||
| int pid = [NSProcessInfo processInfo].processIdentifier; | ||
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| // Get a device identifier. The specification usually has this as the MAC address | ||
| // or hostname but we already have a unique device identifier. | ||
| // | ||
| NSString *identifier = [[[UIDevice currentDevice] identifierForVendor] UUIDString]; | ||
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| // MD5 hash the device identifier | ||
| NSString *md5HashOfIdentifier = [self md5HashFromString:identifier]; | ||
| const char *cIdentifier = [md5HashOfIdentifier cStringUsingEncoding:NSUTF8StringEncoding]; | ||
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| // Copy bytes over to our object id. Specification taken from http://www.mongodb.org/display/DOCS/Object+IDs | ||
| bson_swap_endian_len(&oid->bytes[0], ×tamp, 4); | ||
| bson_swap_endian_len(&oid->bytes[4], &cIdentifier, 3); | ||
| bson_swap_endian_len(&oid->bytes[7], &pid, 2); | ||
| bson_swap_endian_len(&oid->bytes[9], &i, 3); | ||
| NSString *str = [self bson_oid_to_string:oid]; | ||
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| free(oid); | ||
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| return str; | ||
| } | ||
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| /** | ||
| @discussion Given an NSString, returns the MD5 hash of it. Taken from | ||
| http://stackoverflow.com/questions/1524604/md5-algorithm-in-objective-c | ||
| @param source The source string | ||
| @return MD5 hash as a string | ||
| */ | ||
| + (NSString *) md5HashFromString:(NSString *)source { | ||
| const char *cStr = [source UTF8String]; | ||
| unsigned char result[16]; | ||
| CC_MD5(cStr, strlen(cStr), result); | ||
| return [NSString stringWithFormat: | ||
| @"%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x", | ||
| result[0], result[1], result[2], result[3], | ||
| result[4], result[5], result[6], result[7], | ||
| result[8], result[9], result[10], result[11], | ||
| result[12], result[13], result[14], result[15] | ||
| ]; | ||
| } | ||
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| /** | ||
| @discussion Converts a bson_oid_t to an NSString. Mostly taken from https://github.com/mongodb/mongo-c-driver/blob/master/src/bson.c | ||
| @param oid The bson_oid_t to convert | ||
| @return Autoreleased NSString of 24 hex characters | ||
| */ | ||
| + (NSString *) bson_oid_to_string:(bson_oid_t *)oid { | ||
| char *str = malloc(sizeof(char) * 25); | ||
| static const char hex[16] = {'0','1','2','3','4','5','6','7','8','9','a','b','c','d','e','f'}; | ||
| int i; | ||
| for ( i=0; i<12; i++ ) { | ||
| str[2*i] = hex[( oid->bytes[i] & 0xf0 ) >> 4]; | ||
| str[2*i + 1] = hex[ oid->bytes[i] & 0x0f ]; | ||
| } | ||
| str[24] = '\0'; | ||
| NSString *string = [NSString stringWithCString:str encoding:NSUTF8StringEncoding]; | ||
| free(str); | ||
| return string; | ||
| } | ||
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| /** | ||
| @discussion The ARM architecture is little endian while intel macs are big Endian, so we need to swap endianness if we're compiling on a big Endian architecture. | ||
| @param outp The destination pointer | ||
| @param inp The source pointer | ||
| @param len The length to copy | ||
| */ | ||
| void bson_swap_endian_len(void *outp, const void *inp, int len) { | ||
| const char *in = (const char *)inp; | ||
| char *out = (char *)outp; | ||
| for (int i = 0; i < len; i ++) { | ||
| #if __DARWIN_BIG_ENDIAN | ||
| out[i] = in[len - 1 - i]; | ||
| #elif __DARWIN_LITTLE_ENDIAN | ||
| out[i] = in[i]; | ||
| #endif | ||
| } | ||
| } | ||
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| @end |
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commented tokens should be removed