From 05d44e314bba524aabfa45ba3af6d975e4254f87 Mon Sep 17 00:00:00 2001
From: SeanOMik <seanomik@gmail.com>
Date: Thu, 18 Jun 2020 17:48:36 -0500
Subject: [PATCH] Add permission type.

---
 src/permission.nim | 83 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 83 insertions(+)
 create mode 100644 src/permission.nim

diff --git a/src/permission.nim b/src/permission.nim
new file mode 100644
index 0000000..c0fca24
--- /dev/null
+++ b/src/permission.nim
@@ -0,0 +1,83 @@
+import json, discordobject, nimcordutils
+
+type 
+    PermissionType* = enum
+        permTypeRole,
+        permTypeMember
+    
+    Permission* = enum
+        permCreateInstantInvite = 0x00000001,
+        permKickMembers = 0x00000002,
+        permBanMembers = 0x00000004,
+        permAdministrator = 0x00000008,
+        permManageChannels = 0x00000010,
+        permManageGuilds = 0x00000020,
+        permAddReactions = 0x00000040,
+        permViewAuditLog = 0x00000080,
+        permPrioritySpeaker = 0x00000100,
+        permStream = 0x00000200,
+        permReadMessages = 0x00000400,
+        permSendMessages = 0x00000800,
+        permSendTTSMessages = 0x00001000,
+        permManageMessages = 0x00002000,
+        permEmbedLinks = 0x00004000,
+        permAttachFiles = 0x00008000,
+        permReadMessageHistory = 0x00010000,
+        permMentionEveryoneHereAllRoles = 0x00020000,
+        permUseExternalEmojis = 0x00040000,
+        permConnect = 0x00100000,
+        permSpeak = 0x00200000,
+        permMuteMembers = 0x00400000,
+        permDeafenMembers = 0x00800000,
+        permMoveMembers = 0x01000000,
+        permUseVAD = 0x02000000,
+        permChangeNickname = 0x04000000,
+        permManageNicknames = 0x08000000,
+        permManageRoles = 0x10000000,
+        permManageWebhooks = 0x20000000,
+        permManageEmojis = 0x40000000
+
+    Permissions* = ref object
+        ## This type referes to a user's permissions given by the role or per user.
+        roleUserID*: snowflake
+        allowPerms*: uint
+        denyPerms*: uint
+        permissionType*: PermissionType
+
+proc newPermissions*(json: JsonNode): Permissions =
+    ## Parses a `Permissions` from json.
+    result = Permissions(
+        roleUserID: getIDFromJson(json["id"].getStr()),
+        allowPerms: uint(json["allow"].getInt()),
+        denyPerms: uint(json["deny"].getInt())
+    )
+
+    if (json["type"].getStr() == "role"):
+        result.permissionType = PermissionType.permTypeRole
+    else:
+        result.permissionType = PermissionType.permTypeMember
+
+proc hasPermission*(perms: Permissions, perm: Permission): bool =
+    ## Check if Permissions has a specific permission.
+    ## This also checks if it is not a part of the denyPerms.
+    return (perms.allowPerms and uint(perm)) == uint(perm) and (perms.denyPerms and uint(perm)) != uint(perm)
+
+proc addAllowPermission*(perms: Permissions, perm: Permission): Permissions =
+    ## Add a `Permission` to the `Permissions` allow values.
+    ## If it finds the permission in denyPerms, it will remove it from that also.
+    
+    # Check if the permission is in deny, and remove it.
+    if ((perms.denyPerms and uint(perm)) == uint(perm)):
+        perms.denyPerms = perms.denyPerms and (not uint(perm))
+
+    perms.allowPerms = perms.allowPerms or uint(perm)
+
+proc addDenyPermission*(perms: Permissions, perm: Permission): Permissions =
+    ## Add a `Permission` to the `Permissions` deny values.
+    ## If it finds the permission in allowPerms, it will remove it from that also.
+    
+    # Check if the permission is in allowed, and remove it.
+    if ((perms.allowPerms and uint(perm)) == uint(perm)):
+        perms.allowPerms = perms.allowPerms and (not uint(perm))
+
+    perms.denyPerms = perms.denyPerms or uint(perm)
\ No newline at end of file