use aeson fork with the option to encode/decode nullary constructors as empty objects (#312)

* use aeson fork with the option to encode/decode nullary constructors as empty objects

* update dependencies

cabal.project

@@ -1,7 +1,6 @@
 packages: .
 
--- source-repository-package
---   type: git
---   location: git://github.com/simplex-chat/hs-tls.git
---   tag: f6cc753611f80af300401cfae63846e9d7c40d9e
---   subdir: core
+source-repository-package
+    type: git
+    location: git://github.com/simplex-chat/aeson.git
+    tag: 3eb66f9a68f103b5f1489382aad89f5712a64db7

package.yaml

@@ -22,12 +22,12 @@ extra-source-files:
   - CHANGELOG.md
 
 dependencies:
-  - aeson == 1.5.*
+  - aeson == 2.0.*
   - ansi-terminal >= 0.10 && < 0.12
   - asn1-encoding == 0.9.*
   - asn1-types == 0.3.*
   - async == 2.2.*
-  - attoparsec == 0.13.*
+  - attoparsec == 0.14.*
   - base >= 4.7 && < 5
   - base64-bytestring >= 1.0 && < 1.3
   - bytestring == 0.10.*

simplexmq.cabal

@@ -67,12 +67,12 @@ library
   ghc-options: -Wall -Wcompat -Werror=incomplete-patterns -Wredundant-constraints -Wincomplete-record-updates -Wincomplete-uni-patterns -Wunused-type-patterns
   build-depends:
       QuickCheck ==2.14.*
-    , aeson ==1.5.*
+    , aeson ==2.0.*
     , ansi-terminal >=0.10 && <0.12
     , asn1-encoding ==0.9.*
     , asn1-types ==0.3.*
     , async ==2.2.*
-    , attoparsec ==0.13.*
+    , attoparsec ==0.14.*
     , base >=4.7 && <5
     , base64-bytestring >=1.0 && <1.3
     , bytestring ==0.10.*
@@ -118,12 +118,12 @@ executable smp-agent
   ghc-options: -Wall -Wcompat -Werror=incomplete-patterns -Wredundant-constraints -Wincomplete-record-updates -Wincomplete-uni-patterns -Wunused-type-patterns -threaded
   build-depends:
       QuickCheck ==2.14.*
-    , aeson ==1.5.*
+    , aeson ==2.0.*
     , ansi-terminal >=0.10 && <0.12
     , asn1-encoding ==0.9.*
     , asn1-types ==0.3.*
     , async ==2.2.*
-    , attoparsec ==0.13.*
+    , attoparsec ==0.14.*
     , base >=4.7 && <5
     , base64-bytestring >=1.0 && <1.3
     , bytestring ==0.10.*
@@ -170,12 +170,12 @@ executable smp-server
   ghc-options: -Wall -Wcompat -Werror=incomplete-patterns -Wredundant-constraints -Wincomplete-record-updates -Wincomplete-uni-patterns -Wunused-type-patterns -threaded
   build-depends:
       QuickCheck ==2.14.*
-    , aeson ==1.5.*
+    , aeson ==2.0.*
     , ansi-terminal >=0.10 && <0.12
     , asn1-encoding ==0.9.*
     , asn1-types ==0.3.*
     , async ==2.2.*
-    , attoparsec ==0.13.*
+    , attoparsec ==0.14.*
     , base >=4.7 && <5
     , base64-bytestring >=1.0 && <1.3
     , bytestring ==0.10.*
@@ -238,12 +238,12 @@ test-suite smp-server-test
   build-depends:
       HUnit ==1.6.*
     , QuickCheck ==2.14.*
-    , aeson ==1.5.*
+    , aeson ==2.0.*
     , ansi-terminal >=0.10 && <0.12
     , asn1-encoding ==0.9.*
     , asn1-types ==0.3.*
     , async ==2.2.*
-    , attoparsec ==0.13.*
+    , attoparsec ==0.14.*
     , base >=4.7 && <5
     , base64-bytestring >=1.0 && <1.3
     , bytestring ==0.10.*

src/Simplex/Messaging/Parsers.hs

@@ -89,10 +89,30 @@ dropPrefix pfx s =
   let (p, rest) = splitAt (length pfx) s
    in fstToLower $ if p == pfx then rest else s
 
+enumJSON :: (String -> String) -> J.Options
+enumJSON tagModifier =
+  J.defaultOptions
+    { J.constructorTagModifier = tagModifier,
+      J.allNullaryToStringTag = True
+    }
+
 sumTypeJSON :: (String -> String) -> J.Options
-sumTypeJSON tagModifier =
+sumTypeJSON = singleFieldJSON
+
+taggedObjectJSON :: (String -> String) -> J.Options
+taggedObjectJSON tagModifier =
   J.defaultOptions
     { J.sumEncoding = J.TaggedObject "type" "data",
       J.constructorTagModifier = tagModifier,
+      J.nullaryToObject = True,
+      J.omitNothingFields = True
+    }
+
+singleFieldJSON :: (String -> String) -> J.Options
+singleFieldJSON tagModifier =
+  J.defaultOptions
+    { J.sumEncoding = J.ObjectWithSingleField,
+      J.constructorTagModifier = tagModifier,
+      J.nullaryToObject = True,
       J.omitNothingFields = True
     }

stack.yaml

@@ -38,6 +38,15 @@ extra-deps:
   - cryptostore-0.2.1.0@sha256:9896e2984f36a1c8790f057fd5ce3da4cbcaf8aa73eb2d9277916886978c5b19,3881
   - simple-logger-0.1.0@sha256:be8ede4bd251a9cac776533bae7fb643369ebd826eb948a9a18df1a8dd252ff8,1079
   - tls-1.5.7@sha256:1cc30253a9696b65a9cafc0317fbf09f7dcea15e3a145ed6c9c0e28c632fa23a,6991
+# below dependancies are to update Aeson to 2.0.3
+  - OneTuple-0.3.1@sha256:a848c096c9d29e82ffdd30a9998aa2931cbccb3a1bc137539d80f6174d31603e,2262
+  - attoparsec-0.14.4@sha256:79584bdada8b730cb5138fca8c35c76fbef75fc1d1e01e6b1d815a5ee9843191,5810
+  - hashable-1.4.0.2@sha256:0cddd0229d1aac305ea0404409c0bbfab81f075817bd74b8b2929eff58333e55,5005
+  - semialign-1.2.0.1@sha256:0e179b4d3a8eff79001d374d6c91917c6221696b9620f0a4d86852fc6a9b9501,2836
+  - text-short-0.1.5@sha256:962c6228555debdc46f758d0317dea16e5240d01419b42966674b08a5c3d8fa6,3498
+  - time-compat-1.9.6.1@sha256:42d8f2e08e965e1718917d54ad69e1d06bd4b87d66c41dc7410f59313dba4ed1,5033
+  - github: simplex-chat/aeson
+    commit: 3eb66f9a68f103b5f1489382aad89f5712a64db7
   # - ../hs-tls/core
   # - github: simplex-chat/hs-tls
   #   commit: f6cc753611f80af300401cfae63846e9d7c40d9e