From 0c49180c462402785d5abceb59a67afcfa172875 Mon Sep 17 00:00:00 2001 From: me Date: Tue, 17 Dec 2024 10:46:59 +0200 Subject: [PATCH] init --- .dir-locals.el | 5 + .gitignore | 6 + LICENSE | 373 ++++++++++++++++++++++++++++++++++++++++++ app/Main.hs | 49 ++++++ cabal.project | 1 + fedi.cabal | 79 +++++++++ readme.md | 3 + src/Fedi.hs | 7 + src/Fedi/Activity.hs | 114 +++++++++++++ src/Fedi/Actor.hs | 81 +++++++++ src/Fedi/Routes.hs | 67 ++++++++ src/Fedi/Types.hs | 40 +++++ src/Fedi/Webfinger.hs | 72 ++++++++ 13 files changed, 897 insertions(+) create mode 100644 .dir-locals.el create mode 100644 .gitignore create mode 100644 LICENSE create mode 100644 app/Main.hs create mode 100644 cabal.project create mode 100644 fedi.cabal create mode 100644 readme.md create mode 100644 src/Fedi.hs create mode 100644 src/Fedi/Activity.hs create mode 100644 src/Fedi/Actor.hs create mode 100644 src/Fedi/Routes.hs create mode 100644 src/Fedi/Types.hs create mode 100644 src/Fedi/Webfinger.hs diff --git a/.dir-locals.el b/.dir-locals.el new file mode 100644 index 0000000..e17e58e --- /dev/null +++ b/.dir-locals.el @@ -0,0 +1,5 @@ +( + ("src" . ((nil . ((dante-target . "fedi"))))) + + ("app" . ((nil . ((dante-target . "exe:fedi"))))) +) diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..460286e --- /dev/null +++ b/.gitignore @@ -0,0 +1,6 @@ +dist-newstyle/ +newdist/ +templates/ +website/ +user-data/ +out/ diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..a612ad9 --- /dev/null +++ b/LICENSE @@ -0,0 +1,373 @@ +Mozilla Public License Version 2.0 +================================== + +1. Definitions +-------------- + +1.1. "Contributor" + means each individual or legal entity that creates, contributes to + the creation of, or owns Covered Software. + +1.2. "Contributor Version" + means the combination of the Contributions of others (if any) used + by a Contributor and that particular Contributor's Contribution. + +1.3. "Contribution" + means Covered Software of a particular Contributor. + +1.4. "Covered Software" + means Source Code Form to which the initial Contributor has attached + the notice in Exhibit A, the Executable Form of such Source Code + Form, and Modifications of such Source Code Form, in each case + including portions thereof. + +1.5. "Incompatible With Secondary Licenses" + means + + (a) that the initial Contributor has attached the notice described + in Exhibit B to the Covered Software; or + + (b) that the Covered Software was made available under the terms of + version 1.1 or earlier of the License, but not also under the + terms of a Secondary License. + +1.6. "Executable Form" + means any form of the work other than Source Code Form. + +1.7. "Larger Work" + means a work that combines Covered Software with other material, in + a separate file or files, that is not Covered Software. + +1.8. "License" + means this document. + +1.9. "Licensable" + means having the right to grant, to the maximum extent possible, + whether at the time of the initial grant or subsequently, any and + all of the rights conveyed by this License. + +1.10. "Modifications" + means any of the following: + + (a) any file in Source Code Form that results from an addition to, + deletion from, or modification of the contents of Covered + Software; or + + (b) any new file in Source Code Form that contains any Covered + Software. + +1.11. "Patent Claims" of a Contributor + means any patent claim(s), including without limitation, method, + process, and apparatus claims, in any patent Licensable by such + Contributor that would be infringed, but for the grant of the + License, by the making, using, selling, offering for sale, having + made, import, or transfer of either its Contributions or its + Contributor Version. + +1.12. "Secondary License" + means either the GNU General Public License, Version 2.0, the GNU + Lesser General Public License, Version 2.1, the GNU Affero General + Public License, Version 3.0, or any later versions of those + licenses. + +1.13. "Source Code Form" + means the form of the work preferred for making modifications. + +1.14. "You" (or "Your") + means an individual or a legal entity exercising rights under this + License. For legal entities, "You" includes any entity that + controls, is controlled by, or is under common control with You. For + purposes of this definition, "control" means (a) the power, direct + or indirect, to cause the direction or management of such entity, + whether by contract or otherwise, or (b) ownership of more than + fifty percent (50%) of the outstanding shares or beneficial + ownership of such entity. + +2. License Grants and Conditions +-------------------------------- + +2.1. Grants + +Each Contributor hereby grants You a world-wide, royalty-free, +non-exclusive license: + +(a) under intellectual property rights (other than patent or trademark) + Licensable by such Contributor to use, reproduce, make available, + modify, display, perform, distribute, and otherwise exploit its + Contributions, either on an unmodified basis, with Modifications, or + as part of a Larger Work; and + +(b) under Patent Claims of such Contributor to make, use, sell, offer + for sale, have made, import, and otherwise transfer either its + Contributions or its Contributor Version. + +2.2. Effective Date + +The licenses granted in Section 2.1 with respect to any Contribution +become effective for each Contribution on the date the Contributor first +distributes such Contribution. + +2.3. Limitations on Grant Scope + +The licenses granted in this Section 2 are the only rights granted under +this License. No additional rights or licenses will be implied from the +distribution or licensing of Covered Software under this License. +Notwithstanding Section 2.1(b) above, no patent license is granted by a +Contributor: + +(a) for any code that a Contributor has removed from Covered Software; + or + +(b) for infringements caused by: (i) Your and any other third party's + modifications of Covered Software, or (ii) the combination of its + Contributions with other software (except as part of its Contributor + Version); or + +(c) under Patent Claims infringed by Covered Software in the absence of + its Contributions. + +This License does not grant any rights in the trademarks, service marks, +or logos of any Contributor (except as may be necessary to comply with +the notice requirements in Section 3.4). + +2.4. Subsequent Licenses + +No Contributor makes additional grants as a result of Your choice to +distribute the Covered Software under a subsequent version of this +License (see Section 10.2) or under the terms of a Secondary License (if +permitted under the terms of Section 3.3). + +2.5. Representation + +Each Contributor represents that the Contributor believes its +Contributions are its original creation(s) or it has sufficient rights +to grant the rights to its Contributions conveyed by this License. + +2.6. Fair Use + +This License is not intended to limit any rights You have under +applicable copyright doctrines of fair use, fair dealing, or other +equivalents. + +2.7. Conditions + +Sections 3.1, 3.2, 3.3, and 3.4 are conditions of the licenses granted +in Section 2.1. + +3. Responsibilities +------------------- + +3.1. Distribution of Source Form + +All distribution of Covered Software in Source Code Form, including any +Modifications that You create or to which You contribute, must be under +the terms of this License. You must inform recipients that the Source +Code Form of the Covered Software is governed by the terms of this +License, and how they can obtain a copy of this License. You may not +attempt to alter or restrict the recipients' rights in the Source Code +Form. + +3.2. Distribution of Executable Form + +If You distribute Covered Software in Executable Form then: + +(a) such Covered Software must also be made available in Source Code + Form, as described in Section 3.1, and You must inform recipients of + the Executable Form how they can obtain a copy of such Source Code + Form by reasonable means in a timely manner, at a charge no more + than the cost of distribution to the recipient; and + +(b) You may distribute such Executable Form under the terms of this + License, or sublicense it under different terms, provided that the + license for the Executable Form does not attempt to limit or alter + the recipients' rights in the Source Code Form under this License. + +3.3. Distribution of a Larger Work + +You may create and distribute a Larger Work under terms of Your choice, +provided that You also comply with the requirements of this License for +the Covered Software. If the Larger Work is a combination of Covered +Software with a work governed by one or more Secondary Licenses, and the +Covered Software is not Incompatible With Secondary Licenses, this +License permits You to additionally distribute such Covered Software +under the terms of such Secondary License(s), so that the recipient of +the Larger Work may, at their option, further distribute the Covered +Software under the terms of either this License or such Secondary +License(s). + +3.4. Notices + +You may not remove or alter the substance of any license notices +(including copyright notices, patent notices, disclaimers of warranty, +or limitations of liability) contained within the Source Code Form of +the Covered Software, except that You may alter any license notices to +the extent required to remedy known factual inaccuracies. + +3.5. Application of Additional Terms + +You may choose to offer, and to charge a fee for, warranty, support, +indemnity or liability obligations to one or more recipients of Covered +Software. However, You may do so only on Your own behalf, and not on +behalf of any Contributor. You must make it absolutely clear that any +such warranty, support, indemnity, or liability obligation is offered by +You alone, and You hereby agree to indemnify every Contributor for any +liability incurred by such Contributor as a result of warranty, support, +indemnity or liability terms You offer. You may include additional +disclaimers of warranty and limitations of liability specific to any +jurisdiction. + +4. Inability to Comply Due to Statute or Regulation +--------------------------------------------------- + +If it is impossible for You to comply with any of the terms of this +License with respect to some or all of the Covered Software due to +statute, judicial order, or regulation then You must: (a) comply with +the terms of this License to the maximum extent possible; and (b) +describe the limitations and the code they affect. Such description must +be placed in a text file included with all distributions of the Covered +Software under this License. Except to the extent prohibited by statute +or regulation, such description must be sufficiently detailed for a +recipient of ordinary skill to be able to understand it. + +5. Termination +-------------- + +5.1. The rights granted under this License will terminate automatically +if You fail to comply with any of its terms. However, if You become +compliant, then the rights granted under this License from a particular +Contributor are reinstated (a) provisionally, unless and until such +Contributor explicitly and finally terminates Your grants, and (b) on an +ongoing basis, if such Contributor fails to notify You of the +non-compliance by some reasonable means prior to 60 days after You have +come back into compliance. Moreover, Your grants from a particular +Contributor are reinstated on an ongoing basis if such Contributor +notifies You of the non-compliance by some reasonable means, this is the +first time You have received notice of non-compliance with this License +from such Contributor, and You become compliant prior to 30 days after +Your receipt of the notice. + +5.2. If You initiate litigation against any entity by asserting a patent +infringement claim (excluding declaratory judgment actions, +counter-claims, and cross-claims) alleging that a Contributor Version +directly or indirectly infringes any patent, then the rights granted to +You by any and all Contributors for the Covered Software under Section +2.1 of this License shall terminate. + +5.3. In the event of termination under Sections 5.1 or 5.2 above, all +end user license agreements (excluding distributors and resellers) which +have been validly granted by You or Your distributors under this License +prior to termination shall survive termination. + +************************************************************************ +* * +* 6. Disclaimer of Warranty * +* ------------------------- * +* * +* Covered Software is provided under this License on an "as is" * +* basis, without warranty of any kind, either expressed, implied, or * +* statutory, including, without limitation, warranties that the * +* Covered Software is free of defects, merchantable, fit for a * +* particular purpose or non-infringing. The entire risk as to the * +* quality and performance of the Covered Software is with You. * +* Should any Covered Software prove defective in any respect, You * +* (not any Contributor) assume the cost of any necessary servicing, * +* repair, or correction. This disclaimer of warranty constitutes an * +* essential part of this License. No use of any Covered Software is * +* authorized under this License except under this disclaimer. * +* * +************************************************************************ + +************************************************************************ +* * +* 7. Limitation of Liability * +* -------------------------- * +* * +* Under no circumstances and under no legal theory, whether tort * +* (including negligence), contract, or otherwise, shall any * +* Contributor, or anyone who distributes Covered Software as * +* permitted above, be liable to You for any direct, indirect, * +* special, incidental, or consequential damages of any character * +* including, without limitation, damages for lost profits, loss of * +* goodwill, work stoppage, computer failure or malfunction, or any * +* and all other commercial damages or losses, even if such party * +* shall have been informed of the possibility of such damages. This * +* limitation of liability shall not apply to liability for death or * +* personal injury resulting from such party's negligence to the * +* extent applicable law prohibits such limitation. Some * +* jurisdictions do not allow the exclusion or limitation of * +* incidental or consequential damages, so this exclusion and * +* limitation may not apply to You. * +* * +************************************************************************ + +8. Litigation +------------- + +Any litigation relating to this License may be brought only in the +courts of a jurisdiction where the defendant maintains its principal +place of business and such litigation shall be governed by laws of that +jurisdiction, without reference to its conflict-of-law provisions. +Nothing in this Section shall prevent a party's ability to bring +cross-claims or counter-claims. + +9. Miscellaneous +---------------- + +This License represents the complete agreement concerning the subject +matter hereof. If any provision of this License is held to be +unenforceable, such provision shall be reformed only to the extent +necessary to make it enforceable. Any law or regulation which provides +that the language of a contract shall be construed against the drafter +shall not be used to construe this License against a Contributor. + +10. Versions of the License +--------------------------- + +10.1. New Versions + +Mozilla Foundation is the license steward. Except as provided in Section +10.3, no one other than the license steward has the right to modify or +publish new versions of this License. Each version will be given a +distinguishing version number. + +10.2. Effect of New Versions + +You may distribute the Covered Software under the terms of the version +of the License under which You originally received the Covered Software, +or under the terms of any subsequent version published by the license +steward. + +10.3. Modified Versions + +If you create software not governed by this License, and you want to +create a new license for such software, you may create and use a +modified version of this License if you rename the license and remove +any references to the name of the license steward (except to note that +such modified license differs from this License). + +10.4. Distributing Source Code Form that is Incompatible With Secondary +Licenses + +If You choose to distribute Source Code Form that is Incompatible With +Secondary Licenses under the terms of this version of the License, the +notice described in Exhibit B of this License must be attached. + +Exhibit A - Source Code Form License Notice +------------------------------------------- + + This Source Code Form is subject to the terms of the Mozilla Public + License, v. 2.0. If a copy of the MPL was not distributed with this + file, You can obtain one at http://mozilla.org/MPL/2.0/. + +If it is not possible or desirable to put the notice in a particular +file, then You may include the notice in a location (such as a LICENSE +file in a relevant directory) where a recipient would be likely to look +for such a notice. + +You may add additional accurate notices of copyright ownership. + +Exhibit B - "Incompatible With Secondary Licenses" Notice +--------------------------------------------------------- + + This Source Code Form is "Incompatible With Secondary Licenses", as + defined by the Mozilla Public License, v. 2.0. diff --git a/app/Main.hs b/app/Main.hs new file mode 100644 index 0000000..2321f01 --- /dev/null +++ b/app/Main.hs @@ -0,0 +1,49 @@ +module Main where + +import Data.Aeson qualified as A +import Network.Wai.Handler.Warp (run, Port) +import Network.Wai.Middleware.RequestLogger qualified as Logger +import System.Environment (getArgs) +import System.Environment (lookupEnv) +import Web.Twain qualified as Twain +import Fedi qualified as Fedi +import Data.Functor ((<&>)) + +main :: IO () +main = do + getArgs >>= \case + [] -> pure () + _ -> usageError + fediPort <- maybe 3001 read <$> lookupEnv "FEDI_PORT" + runServer fediPort =<< mkFediApp + +usageError :: err +usageError = + errorWithoutStackTrace $ unlines + [ "Usage: fedi" + , "Env vars:" + , " - FEDI_PORT=" + , " - FEDI_DETAILS=" + ] + +-- | Run server at at specific port. +runServer :: Port -> Twain.Application -> IO () +runServer port app = do + putStrLn $ unwords + [ "Running fedi at" + , "http://localhost:" <> show port + , "(ctrl-c to quit)" + ] + run port (Logger.logStdoutDev app) + +-- | Application description. +mkFediApp :: IO Twain.Application +mkFediApp = do + detailsFile <- lookupEnv "FEDI_DETAILS" + <&> maybe (error "missing FEDI_DETAILS") id + details <- A.decodeFileStrict detailsFile + <&> maybe (error $ "could not read file '" <> detailsFile <> "'.") id + + pure $ foldr ($) + (Twain.notFound $ Twain.send $ Twain.text "Error: not found.") + (Fedi.routes details) diff --git a/cabal.project b/cabal.project new file mode 100644 index 0000000..0d7f076 --- /dev/null +++ b/cabal.project @@ -0,0 +1 @@ +packages: *.cabal diff --git a/fedi.cabal b/fedi.cabal new file mode 100644 index 0000000..0507b5a --- /dev/null +++ b/fedi.cabal @@ -0,0 +1,79 @@ +cabal-version: 3.4 +name: fedi +version: 0.1.0.0 +license: MPL-2.0 +license-file: LICENSE +author: campxfire +maintainer: me@campxfire.space +category: Web +build-type: Simple +extra-doc-files: readme.md +-- extra-source-files: + +common warnings + ghc-options: -Wall -fno-warn-type-defaults + +library + import: warnings + exposed-modules: + Fedi + Fedi.Activity + Fedi.Actor + Fedi.Routes + Fedi.Types + Fedi.Webfinger + -- other-modules: + -- other-extensions: + build-depends: + aeson + , base + , bytestring + , cmark-gfm + , unordered-containers + , containers + , directory + , filepath + , htoml-megaparsec + , process + , text >= 2.0.1 + , twain + , mime-types + , time + + hs-source-dirs: src + default-language: GHC2021 + default-extensions: + BlockArguments + LambdaCase + OverloadedRecordDot + OverloadedStrings + QuasiQuotes + DerivingVia + GeneralizedNewtypeDeriving + DeriveAnyClass + DerivingStrategies + +executable fedi + import: warnings + main-is: Main.hs + -- other-modules: + -- other-extensions: + build-depends: + aeson + , async + , base + , fedi + , wai-extra + , warp + , twain + , text + + hs-source-dirs: app + default-language: GHC2021 + default-extensions: + BlockArguments + LambdaCase + OverloadedRecordDot + OverloadedStrings + QuasiQuotes + ghc-options: -Wall -O -threaded -rtsopts -with-rtsopts=-N diff --git a/readme.md b/readme.md new file mode 100644 index 0000000..6501a18 --- /dev/null +++ b/readme.md @@ -0,0 +1,3 @@ +# fedi + +Activitypub library. diff --git a/src/Fedi.hs b/src/Fedi.hs new file mode 100644 index 0000000..50d52ea --- /dev/null +++ b/src/Fedi.hs @@ -0,0 +1,7 @@ +module Fedi (module Export) where + +import Fedi.Activity as Export +import Fedi.Actor as Export +import Fedi.Routes as Export +import Fedi.Types as Export +import Fedi.Webfinger as Export diff --git a/src/Fedi/Activity.hs b/src/Fedi/Activity.hs new file mode 100644 index 0000000..3720b2e --- /dev/null +++ b/src/Fedi/Activity.hs @@ -0,0 +1,114 @@ +module Fedi.Activity where + +import Data.Aeson qualified as A +import Data.Text qualified as T +import Fedi.Types +import Fedi.Actor +import Data.Time (UTCTime) + +data Activity + = Create + { createId :: ActivityUrl + , actor :: ActorId + , object :: Object + } + +type ActivityUrl = Url + +data Object + = NoteObject Note + +data Note + = Note + { noteId :: NoteId + , notePublished :: UTCTime + , noteActor :: ActorId + , noteContent :: T.Text + , noteName :: Maybe String + , noteUrl :: Maybe Url + , noteReplies :: Collection Unordered Note + } +type NoteId = Url + +type Followers = [Actor] +type Following = [Actor] + +type Inbox = Collection Ordered Activity +type Outbox = Collection Unordered Activity + +data Ordered +data Unordered + +data Collection order a + = Collection + { collectionSummary :: String + , collectionItems :: [a] + } + +instance A.ToJSON Note where + toJSON note = + A.object + [ "type" A..= ("Note" :: String) + , "id" A..= note.noteId + , "published" A..= note.notePublished + , "attributedTo" A..= note.noteActor + , "content" A..= note.noteContent + ] + +instance A.ToJSON Object where + toJSON = \case + NoteObject note -> A.toJSON note + +instance A.ToJSON Activity where + toJSON = \case + create@Create{} -> + A.object + [ "@context" A..= + [ "https://www.w3.org/ns/activitystreams" :: String + ] + , "type" A..= ("Create" :: String) + , "id" A..= create.createId + , "actor" A..= create.actor + , "object" A..= create.object + ] + +instance A.ToJSON a => A.ToJSON (Collection Ordered a) where + toJSON collection = + A.object + [ "@context" A..= + [ "https://www.w3.org/ns/activitystreams" :: String + ] + , "type" A..= ("OrderedCollection" :: String) + , "summary" A..= collection.collectionSummary + , "totalItems" A..= length collection.collectionItems + , "orderedItems" A..= collection.collectionItems + ] + +instance A.ToJSON a => A.ToJSON (Collection Unordered a) where + toJSON collection = + A.object + [ "@context" A..= + [ "https://www.w3.org/ns/activitystreams" :: String + ] + , "type" A..= ("Collection" :: String) + , "summary" A..= collection.collectionSummary + , "totalItems" A..= length collection.collectionItems + , "items" A..= collection.collectionItems + ] + +{- + "@context": "https://www.w3.org/ns/activitystreams", + "summary": "Sally's notes", + "type": "OrderedCollection", + "totalItems": 2, + "orderedItems": [ + { + "type": "Note", + "name": "A Simple Note" + }, + { + "type": "Note", + "name": "Another Simple Note" + } + ] +-} diff --git a/src/Fedi/Actor.hs b/src/Fedi/Actor.hs new file mode 100644 index 0000000..1b3be22 --- /dev/null +++ b/src/Fedi/Actor.hs @@ -0,0 +1,81 @@ +module Fedi.Actor where + +import Data.Aeson qualified as A +import Fedi.Types + +data Actor + = Actor + { actorId :: Url + , actorName :: String + , actorPreferredUsername :: String + , actorSummary :: String + , actorIcon :: Url + , actorPublicKey :: PublicKey + } + deriving Show + +type ActorId = Url + +data ActorType + = Person + deriving Show + +data PublicKey + = PublicKey + { pkId :: Url + , pkOwner :: Url + , pkPublicKeyPem :: Pem + } + deriving Show + +makeActor :: UserDetails -> Actor +makeActor details = + let + url = "https://" <> details.domain + actorUrl = url <> "/" <> details.username + in Actor + { actorId = actorUrl + , actorName = details.name + , actorPreferredUsername = details.username + , actorSummary = details.summary + , actorIcon = details.icon + , actorPublicKey = + PublicKey + { pkId = actorUrl <> "#main-key" + , pkOwner = actorUrl + , pkPublicKeyPem = details.pem + } + } + +instance A.ToJSON Actor where + toJSON actor = + A.object + [ "@context" A..= + [ "https://www.w3.org/ns/activitystreams" :: String + , "https://w3id.org/security/v1" + ] + , "id" A..= actor.actorId + , "type" A..= Person + , "name" A..= actor.actorName + , "preferredUsername" A..= actor.actorPreferredUsername + , "summary" A..= actor.actorSummary + , "icon" A..= A.object + [ "type" A..= ("Image" :: String) + , "mediaType" A..= ("image/png" :: String) + , "url" A..= actor.actorIcon + ] + , "inbox" A..= (actor.actorId <> "/inbox") + , "outbox" A..= (actor.actorId <> "/outbox") + , "publicKey" A..= actor.actorPublicKey + ] + +instance A.ToJSON ActorType where + toJSON Person = A.String "Person" + +instance A.ToJSON PublicKey where + toJSON pk = + A.object + [ "id" A..= pk.pkId + , "owner" A..= pk.pkOwner + , "publicKeyPem" A..= pk.pkPublicKeyPem + ] diff --git a/src/Fedi/Routes.hs b/src/Fedi/Routes.hs new file mode 100644 index 0000000..4f0a241 --- /dev/null +++ b/src/Fedi/Routes.hs @@ -0,0 +1,67 @@ +module Fedi.Routes where + +import Web.Twain qualified as Twain +import Web.Twain.Types qualified as Twain +import Data.String (fromString) +import Data.Aeson qualified as A +import Data.ByteString.Lazy qualified as BSL +import Fedi.Types +import Fedi.Activity +import Fedi.Actor +import Fedi.Webfinger + +-- * Routes + +routes :: UserDetails -> [Twain.Middleware] +routes details = + [ Twain.get (matchUser details) do + handleUser details + + , Twain.get (matchOutbox details) do + handleOutbox details + + , Twain.get matchWebfinger do + handleWebfinger details + ] + +jsonLD :: BSL.ByteString -> Twain.Response +jsonLD = + Twain.raw + Twain.status200 + [(Twain.hContentType, "application/activity+json; charset=utf-8")] + +-- * User + +matchUser :: UserDetails -> Twain.PathPattern +matchUser details = fromString ("/" <> details.username) + +handleUser :: UserDetails -> Twain.ResponderM a +handleUser details = do + let content = makeActor details + Twain.send $ jsonLD (A.encode content) + +-- * Webfinger + +matchWebfinger :: Twain.PathPattern +matchWebfinger = "/.well-known/webfinger" + +handleWebfinger :: UserDetails -> Twain.ResponderM b +handleWebfinger details = do + resource <- Twain.param "resource" + let webfinger = makeWebfinger details + if resource == ppSubject webfinger.wfSubject + then do + Twain.send $ jsonLD (A.encode webfinger) + else do + Twain.next + +-- * Outbox + +matchOutbox :: UserDetails -> Twain.PathPattern +matchOutbox details = + fromString ("/" <> details.username <> "/outbox") + +handleOutbox :: UserDetails -> Twain.ResponderM b +handleOutbox details = do + let content = Collection { collectionSummary = details.username <> "'s notes", collectionItems = [] } :: Outbox + Twain.send $ jsonLD (A.encode content) diff --git a/src/Fedi/Types.hs b/src/Fedi/Types.hs new file mode 100644 index 0000000..c54fec7 --- /dev/null +++ b/src/Fedi/Types.hs @@ -0,0 +1,40 @@ +module Fedi.Types where + +import GHC.Generics (Generic) +import Data.Aeson qualified as A +import Data.Text qualified as T + +data Rel = Self + deriving Show + +instance A.ToJSON Rel where + toJSON Self = A.String "self" + + +data LinkType = ActivityJson + deriving Show + +instance A.ToJSON LinkType where + toJSON ActivityJson = A.String "application/activity+json" + +type Url = String +type Domain = String +type Username = String + +newtype Pem = Pem T.Text + deriving Show + deriving A.FromJSON via T.Text + +instance A.ToJSON Pem where + toJSON (Pem pem) = A.String pem + +data UserDetails + = UserDetails + { domain :: Domain + , username :: String + , name :: String + , summary :: String + , icon :: Url + , pem :: Pem + } + deriving (Generic, A.FromJSON) diff --git a/src/Fedi/Webfinger.hs b/src/Fedi/Webfinger.hs new file mode 100644 index 0000000..1d577e2 --- /dev/null +++ b/src/Fedi/Webfinger.hs @@ -0,0 +1,72 @@ +module Fedi.Webfinger where + +import Data.String (fromString) +import Data.Aeson qualified as A +import Fedi.Types + +data Webfinger + = Webfinger + { wfSubject :: Subject + , wfLinks :: [Link] + } + deriving Show + +data Subject + = Subject + { subjectUsername :: Username + , subjectDomain :: Domain + } + deriving Show + +ppSubject :: Subject -> String +ppSubject subject = + "acct:" <> subject.subjectUsername <> "@" <> subject.subjectDomain + +data Link + = Link + { linkRel :: Rel + , linkType :: LinkType + , linkHref :: Url + } + deriving Show + +makeWebfinger :: UserDetails -> Webfinger +makeWebfinger details = + let + url = "https://" <> details.domain + in + Webfinger + { wfSubject = Subject + { subjectUsername = details.username + , subjectDomain = details.domain + } + , wfLinks = + [ Link + { linkRel = Self + , linkType = ActivityJson + , linkHref = url <> "/" <> details.username + } + ] + } + +-- * ------------------------- +--- + +instance A.ToJSON Webfinger where + toJSON webfinger = + A.object + [ "subject" A..= webfinger.wfSubject + , "links" A..= webfinger.wfLinks + ] + +instance A.ToJSON Subject where + toJSON subject = + fromString $ ppSubject subject + +instance A.ToJSON Link where + toJSON link = + A.object + [ "rel" A..= link.linkRel + , "type" A..= link.linkType + , "href" A..= link.linkHref + ]