add parseVars API

docs/api.md

@@ -28,6 +28,8 @@ If you find anything not listed or not exported in this list, please submit an i
     - `addVar(ctx: GraphqlRef, name: string)`. Add a `null` variable.
 
   - `parseVar(ctx: GraphqlRef, name: string, value: string | openArray[byte]): ParseResult`. Add new variable to the system by parsing a text string.
+  - `parseVars(ctx: GraphqlRef, value: string | openArray[byte]): ParseResult`. 
+     Add new variables to the system by parsing map. Top level keys will become variables name.
   - `addResolvers(ctx: GraphqlRef, ud: RootRef, typeName: Name, resolvers: openArray[(string, ResolverProc)])`. Add a list of resolvers to the system.
     - `addResolvers(ctx: GraphqlRef, ud: RootRef, typeName: string, resolvers: openArray[(string, ResolverProc)])`
   - `createName(ctx: GraphqlRef, name: string): Name`. `respMap` will need a name from the system using this proc.

graphql/api.nim

@@ -86,6 +86,7 @@ proc parseVariable(q: var Parser): Node =
   nextToken
   if currToken == tokEof:
     return
+  rgReset(rgValueLiteral) # recursion guard
   q.valueLiteral(isConst = true, result)
 
 proc parseVariable(ctx: GraphqlRef, name: string, input: InputStream): GraphqlResult =
@@ -109,6 +110,33 @@ proc parseVar*(ctx: GraphqlRef, name: string,
     var stream = unsafeMemoryInput(value)
     ctx.parseVariable(name, stream)
 
+proc parseVars(ctx: GraphqlRef, input: InputStream): GraphqlResult  =
+  var parser = Parser.init(input, ctx.names)
+  parser.lex.next()
+  if parser.lex.tok == tokEof:
+    return ok()
+
+  var values: Node
+  parser.rgReset(rgValueLiteral) # recursion guard
+  parser.valueLiteral(isConst = true, values)
+  if parser.error != errNone:
+    return err(@[parser.err])
+
+  for n in values:
+    ctx.varTable[n[0].name] = n[1]
+
+  ok()
+
+proc parseVars*(ctx: GraphqlRef, input: string): GraphqlResult  {.gcsafe.} =
+  {.gcsafe.}:
+    var stream = unsafeMemoryInput(input)
+    ctx.parseVars(stream)
+
+proc parseVars*(ctx: GraphqlRef, input: openArray[byte]): GraphqlResult  {.gcsafe.} =
+  {.gcsafe.}:
+    var stream = unsafeMemoryInput(input)
+    ctx.parseVars(stream)
+
 proc addResolvers*(ctx: GraphqlRef, ud: RootRef, typeName: Name,
                    resolvers: openArray[tuple[name: string, resolver: ResolverProc]]) =
   var res = ctx.resolver.getOrDefault(typeName)
@@ -193,7 +221,8 @@ proc purgeQueries*(ctx: GraphqlRef, includeVariables: bool) =
   if includeVariables:
     ctx.varTable.clear()
 
-proc purgeSchema*(ctx: GraphqlRef, includeScalars, includeResolvers: bool) =
+proc purgeSchema*(ctx: GraphqlRef, includeScalars,
+                  includeResolvers, includeCoercion: bool) =
   var names = initHashSet[Name]()
   for n, v in ctx.typeTable:
     if sfBuiltin notin v.flags:
@@ -214,6 +243,10 @@ proc purgeSchema*(ctx: GraphqlRef, includeScalars, includeResolvers: bool) =
     for n in names:
       ctx.resolver.del(n)
 
+  if includeCoercion:
+    for n in names:
+      ctx.coerceTable.del(n)
+
 proc getNameCounter*(ctx: GraphqlRef): NameCounter =
   ctx.names.getCounter()
 

graphql/server_common.nim

@@ -86,6 +86,8 @@ proc jsonOkResp*(data: openArray[byte]): string =
   resp.getString()
 
 proc addVariables*(ctx: GraphqlRef, vars: Node) =
+  if vars.kind != nkInput:
+    return
   for n in vars:
     if n.len != 2: continue
     # support both json/graphql object key
@@ -102,8 +104,10 @@ proc parseLiteral(ctx: GraphqlRef, input: InputStream): ParseResult =
   # we want to parse a json object
   parser.flags.incl pfJsonCompatibility
   parser.lex.next()
+  if parser.lex.tok == tokEof:
+    return ok(ctx.emptyNode)
   parser.rgReset(rgValueLiteral) # recursion guard
-  parser.valueLiteral(true, values)
+  parser.valueLiteral(isConst = true, values)
   if parser.error != errNone:
     return err(@[parser.err])
   ok(values)

playground/swapi.nim

@@ -482,7 +482,7 @@ proc coerceEnum(ctx: GraphqlRef, typeNode, node: Node): NodeResult {.cdecl, gcsa
   if node.kind == nkString:
     ok(Node(kind: nkEnum, name: ctx.createName(node.stringVal), pos: node.pos))
   else:
-    err("cannot coerce '$1' to $2" % [$node.kind, $typeNode.sym.name])
+    err("cannot coerce '$1' to $2" % [$node.kind, $typeNode])
 
 {.pop.}
 

tests/test_execution.nim

@@ -93,7 +93,7 @@ proc runSuite(ctx: GraphqlRef, savePoint: NameCounter, fileName: string, counter
         else:
           ctx.runExecutor(unit, testStatusIMPL)
           ctx.purgeQueries(false)
-          ctx.purgeSchema(false, false)
+          ctx.purgeSchema(false, false, false)
           ctx.purgeNames(savePoint)
           if testStatusIMPL == OK:
             inc counter.ok
@@ -133,7 +133,7 @@ when isMainModule:
       test unit.name:
         ctx.runExecutor(unit, testStatusIMPL)
         ctx.purgeQueries(true)
-        ctx.purgeSchema(true, true)
+        ctx.purgeSchema(true, true, false)
         ctx.purgeNames(savePoint)
 
   var message: string

tests/test_introspection.nim

@@ -133,7 +133,7 @@ proc runSuite(ctx: GraphqlRef, savePoint: NameCounter, fileName: string, counter
         else:
           ctx.runExecutor(unit, testStatusIMPL)
           ctx.purgeQueries(false)
-          ctx.purgeSchema(false, false)
+          ctx.purgeSchema(false, false, false)
           ctx.purgeNames(savePoint)
           if testStatusIMPL == OK:
             inc counter.ok
@@ -175,7 +175,7 @@ when isMainModule:
       test unit.name:
         ctx.runExecutor(unit, testStatusIMPL)
         ctx.purgeQueries(true)
-        ctx.purgeSchema(true, true)
+        ctx.purgeSchema(true, true, true)
         ctx.purgeNames(savePoint)
 
   var message: string

tests/test_schemaintros.nim

@@ -57,7 +57,7 @@ proc main() =
       let parts = splitFile(fileName)
       test parts.name:
         ctx.runValidator(fileName, testStatusIMPL)
-        ctx.purgeSchema(true, true)
+        ctx.purgeSchema(true, true, true)
         ctx.purgeQueries(true)
         ctx.purgeNames(savePoint)
 

tests/test_validation.nim

@@ -101,7 +101,7 @@ proc runConverter(ctx: GraphqlRef, savePoint: NameCounter, path, output: string)
   for unit in mitems(cases.units):
     ctx.runConverter(unit)
     ctx.purgeQueries(false)
-    ctx.purgeSchema(false, false)
+    ctx.purgeSchema(false, false, false)
     ctx.purgeNames(savePoint)
     writeUnit(f, unit)
 
@@ -141,7 +141,7 @@ proc runSuite(ctx: GraphqlRef, savePoint: NameCounter, fileName: string, counter
         else:
           ctx.runValidator(unit, testStatusIMPL)
           ctx.purgeQueries(false)
-          ctx.purgeSchema(false, false)
+          ctx.purgeSchema(false, false, false)
           ctx.purgeNames(savePoint)
           if testStatusIMPL == OK:
             inc counter.ok
@@ -183,7 +183,7 @@ proc validateSchemas() =
       test fileName:
         ctx.runValidator(fileName, testStatusIMPL)
         ctx.purgeQueries(true)
-        ctx.purgeSchema(true, true)
+        ctx.purgeSchema(true, true, true)
         ctx.purgeNames(savePoint)
 
 when isMainModule:
@@ -217,7 +217,7 @@ when isMainModule:
       test unit.name:
         ctx.runValidator(unit, testStatusIMPL)
         ctx.purgeQueries(true)
-        ctx.purgeSchema(true, true)
+        ctx.purgeSchema(true, true, true)
         ctx.purgeNames(savePoint)
 
   var message: string