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comparison src/ur/openidUser.urs @ 28:fcd3a977d77b

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More type class instances for user type; allow choose to fail
author Adam Chlipala <adam@chlipala.net>
date Thu, 24 Feb 2011 17:29:05 -0500
parents ee97bc0e08fa
children 1be573ac8e2b
comparison
equal deleted inserted replaced
27:f129ddee75f3 28:fcd3a977d77b
4 * to log in as that user. This module provides all the code you need to sign 4 * to log in as that user. This module provides all the code you need to sign
5 * users up, log them in, and check which user is logged in. 5 * users up, log them in, and check which user is logged in.
6 * 6 *
7 * Module author: Adam Chlipala 7 * Module author: Adam Chlipala
8 *) 8 *)
9
10 datatype choose_result a = Success of a | Failure of string
9 11
10 (* Instantiate this functor to create your customized authentication scheme. *) 12 (* Instantiate this functor to create your customized authentication scheme. *)
11 functor Make(M: sig 13 functor Make(M: sig
12 con cols :: {Type} 14 con cols :: {Type}
13 constraint [Id] ~ cols 15 constraint [Id] ~ cols
33 35
34 val tabulate : creationState -> signal creationData 36 val tabulate : creationState -> signal creationData
35 (* Functionalize current state. *) 37 (* Functionalize current state. *)
36 38
37 val choose : sql_table ([Id = string] ++ cols) [Pkey = [Id]] 39 val choose : sql_table ([Id = string] ++ cols) [Pkey = [Id]]
38 -> creationData -> transaction $cols 40 -> creationData -> transaction (choose_result $cols)
39 (* Use functionalized state to choose initial column values, 41 (* Use functionalized state to choose initial column values,
40 * given a handle to the users table. *) 42 * given a handle to the users table. *)
41 43
42 val sessionLifetime : int 44 val sessionLifetime : int
43 (* Number of seconds a session may live *) 45 (* Number of seconds a session may live *)
65 * identifier, which can be useful during development (say, 67 * identifier, which can be useful during development (say,
66 * when you're off-network). *) 68 * when you're off-network). *)
67 end) : sig 69 end) : sig
68 70
69 type user 71 type user
72 val eq_user : eq user
70 val show_user : show user 73 val show_user : show user
74 val read_user : read user
71 val inj_user : sql_injectable_prim user 75 val inj_user : sql_injectable_prim user
72 (* The abstract type of user IDs. It's really [string], but this is only 76 (* The abstract type of user IDs. It's really [string], but this is only
73 * exposed via some standard type class instances. *) 77 * exposed via some standard type class instances. *)
74 78
75 table user : ([Id = user] ++ M.cols) 79 table user : ([Id = user] ++ M.cols)