sketches of generated graphql client

TODO

@@ -0,0 +1,15 @@
+Query structures to support:
+- arguments
+- repeated fields
+- interfaces
+
+Config options:
+- schema location (http or file)
+- use http client or not
+- use ctx or not, maybe
+- target url (const or maybe allow it to be dynamic at runtime?
+- auth (maybe via client + roundtripper)
+- HTTP calling convention???
+
+Misc:
+- replace __ with some unicode garbage

example/generate_me.go

@@ -0,0 +1,52 @@
+package example
+
+import (
+	"context"
+	"encoding/json"
+	"io/ioutil"
+	"net/http"
+	"strings"
+)
+
+type GetViewerResponse = struct {
+	Viewer struct {
+		Name string `json:"name"`
+	} `json:"viewer"`
+}
+
+// GetViewer gets the current user's name.
+func GetViewer(ctx context.Context) (*GetViewerResponse, error) {
+	req, err := http.NewRequestWithContext(
+		ctx, http.MethodPost,
+		`https://api.github.com/graphql`,
+		strings.NewReader(`
+"GetViewer gets the current user's name."
+query GetViewer {
+  Viewer: viewer {
+    Name: name
+  }
+}
+`))
+	if err != nil {
+		return nil, err
+	}
+
+	resp, err := http.DefaultClient.Do(req)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+
+	body, err := ioutil.ReadAll(resp.Body)
+	if err != nil {
+		return nil, err
+	}
+
+	retval := GetViewerResponse{}
+	err = json.Unmarshal(body, &retval)
+	if err != nil {
+		return nil, err
+	}
+
+	return &retval, nil
+}

example/queries.graphql

@@ -0,0 +1,6 @@
+"GetViewer gets the current user's name."
+query GetUser($login: String!) {
+  User: user(login: $login) {
+    Name: name
+  }
+}

generate/generate.go

@@ -0,0 +1,5 @@
+package generate
+
+import "github.com/vektah/gqlparser"
+
+var _ = gqlparser.LoadSchema

generate/query.go.tmpl

@@ -0,0 +1,41 @@
+package {{.PackageName}}
+
+import (
+	"context"
+	"encoding/json"
+	"io/ioutil"
+	"net/http"
+	"strings"
+)
+
+type {{.ResponseName}} = {{.ResponseType}}
+
+// {{.QueryDoc}}
+func {{.QueryName}}(ctx context.Context) (*{{.ResponseName}}, error) {
+	req, err := http.NewRequestWithContext(
+		ctx, http.MethodPost,
+		`{{.Endpoint}}`,
+		strings.NewReader(`{{.Query}}`))
+	if err != nil {
+		return nil, err
+	}
+
+	resp, err := http.DefaultClient.Do(req)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+
+	body, err := ioutil.ReadAll(resp.Body)
+	if err != nil {
+		return nil, err
+	}
+
+	retval := {{.ResponseName}}{}
+	err = json.Unmarshal(body, &retval)
+	if err != nil {
+		return nil, err
+	}
+
+	return &retval, nil
+}

go.mod

@@ -0,0 +1,5 @@
+module github.com/Khan/genql
+
+go 1.13
+
+require github.com/vektah/gqlparser v1.2.0

go.sum

@@ -0,0 +1,13 @@
+github.com/agnivade/levenshtein v1.0.1 h1:3oJU7J3FGFmyhn8KHjmVaZCN5hxTr7GxgRue+sxIXdQ=
+github.com/agnivade/levenshtein v1.0.1/go.mod h1:CURSv5d9Uaml+FovSIICkLbAUZ9S4RqaHDIsdSBg7lM=
+github.com/andreyvit/diff v0.0.0-20170406064948-c7f18ee00883/go.mod h1:rCTlJbsFo29Kk6CurOXKm700vrz8f0KW0JNfpkRJY/8=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/sergi/go-diff v1.0.0/go.mod h1:0CfEIISq7TuYL3j771MWULgwwjU+GofnZX9QAmXWZgo=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
+github.com/vektah/gqlparser v1.2.0 h1:ntkSCX7F5ZJKl+HIVnmLaO269MruasVpNiMOjX9kgo0=
+github.com/vektah/gqlparser v1.2.0/go.mod h1:bkVf0FX+Stjg/MHnm8mEyubuaArhNEqfQhF+OTiAL74=
+golang.org/x/tools v0.0.0-20190125232054-d66bd3c5d5a6/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=