Friends method in account service, String method for Post

Signed-off-by: Vartan Benohanian <vartanbeno@gmail.com>

account.go

@@ -2,6 +2,8 @@ package geddit
 
 import (
 	"context"
+	"encoding/json"
+	"errors"
 	"net/http"
 )
 
@@ -301,3 +303,67 @@ func (s *AccountService) Trophies(ctx context.Context) ([]Trophy, *Response, err
 
 	return trophies, resp, nil
 }
+
+type rootFriendList struct {
+	Friends []Friendship
+}
+
+// UnmarshalJSON implements the json.Unmarshaler interface.
+func (l *rootFriendList) UnmarshalJSON(b []byte) error {
+	var resBody []interface{}
+	err := json.Unmarshal(b, &resBody)
+	if err != nil {
+		return err
+	}
+
+	if len(resBody) == 0 {
+		return errors.New("unexpected data length received")
+	}
+
+	data, ok := resBody[0].(map[string]interface{})
+	if !ok {
+		return errors.New("unexpected data type received")
+	}
+
+	dataMap, ok := data["data"].(map[string]interface{})
+	if !ok {
+		return errors.New("data does not contain expected field")
+	}
+
+	children, ok := dataMap["children"].([]interface{})
+	if !ok {
+		return errors.New("data does not contain expected field")
+	}
+
+	byteValue, err := json.Marshal(children)
+	if err != nil {
+		return nil
+	}
+
+	var friends []Friendship
+	err = json.Unmarshal(byteValue, &friends)
+	if err != nil {
+		return err
+	}
+
+	l.Friends = friends
+	return nil
+}
+
+// Friends returns a list of your friends.
+func (s *AccountService) Friends(ctx context.Context) ([]Friendship, *Response, error) {
+	path := "prefs/friends"
+
+	req, err := s.client.NewRequest(http.MethodGet, path, nil)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	root := new(rootFriendList)
+	resp, err := s.client.Do(ctx, req, root)
+	if err != nil {
+		return nil, resp, err
+	}
+
+	return root.Friends, resp, nil
+}

account_test.go

@@ -97,6 +97,21 @@ var expectedSettings = &Settings{
 	EnableVideoAutoplay:                           Bool(true),
 }
 
+var expectedFriends = []Friendship{
+	{
+		ID:       "r9_1r4879",
+		Friend:   "test1",
+		FriendID: "t2_test1",
+		Created:  &Timestamp{time.Date(2020, 6, 28, 16, 43, 55, 0, time.UTC)},
+	},
+	{
+		ID:       "r9_1re930",
+		Friend:   "test2",
+		FriendID: "t2_test2",
+		Created:  &Timestamp{time.Date(2020, 6, 28, 16, 44, 2, 0, time.UTC)},
+	},
+}
+
 func TestAccountService_Info(t *testing.T) {
 	setup()
 	defer teardown()
@@ -183,3 +198,19 @@ func TestAccountService_Trophies(t *testing.T) {
 	assert.NoError(t, err)
 	assert.Equal(t, expectedTrophies, trophies)
 }
+
+func TestAccountService_Friends(t *testing.T) {
+	setup()
+	defer teardown()
+
+	blob := readFileContents(t, "testdata/account/friends.json")
+
+	mux.HandleFunc("/prefs/friends", func(w http.ResponseWriter, r *http.Request) {
+		assert.Equal(t, http.MethodGet, r.Method)
+		fmt.Fprint(w, blob)
+	})
+
+	friends, _, err := client.Account.Friends(ctx)
+	assert.NoError(t, err)
+	assert.Equal(t, expectedFriends, friends)
+}

testdata/account/friends.json

@@ -0,0 +1,27 @@
+[
+  {
+    "kind": "UserList",
+    "data": {
+      "children": [
+        {
+          "date": 1593362635,
+          "rel_id": "r9_1r4879",
+          "name": "test1",
+          "id": "t2_test1"
+        },
+        {
+          "date": 1593362642,
+          "rel_id": "r9_1re930",
+          "name": "test2",
+          "id": "t2_test2"
+        }
+      ]
+    }
+  },
+  {
+    "kind": "UserList",
+    "data": {
+      "children": []
+    }
+  }
+]

things.go

@@ -3,6 +3,8 @@ package geddit
 import (
 	"encoding/json"
 	"errors"
+	"fmt"
+	"strings"
 )
 
 const (
@@ -229,11 +231,14 @@ type Comment struct {
 
 	PostID string `json:"link_id,omitempty"`
 
-	// These don't appear when submitting a comment
+	// This doesn't appear when submitting a comment.
-	PostTitle       string `json:"link_title,omitempty"`
+	PostTitle string `json:"link_title,omitempty"`
-	PostPermalink   string `json:"link_permalink,omitempty"`
+	// This doesn't appear when submitting a comment.
-	PostAuthor      string `json:"link_author,omitempty"`
+	PostPermalink string `json:"link_permalink,omitempty"`
-	PostNumComments int    `json:"num_comments"`
+	// This doesn't appear when submitting a comment.
+	PostAuthor string `json:"link_author,omitempty"`
+	// This doesn't appear when submitting a comment.
+	PostNumComments int `json:"num_comments"`
 
 	IsSubmitter bool `json:"is_submitter"`
 	ScoreHidden bool `json:"score_hidden"`
@@ -302,6 +307,18 @@ type Post struct {
 	Stickied   bool `json:"stickied"`
 }
 
+func (p Post) String() string {
+	chunks := []string{
+		fmt.Sprintf("[%d]", p.Score),
+		p.SubredditNamePrefixed,
+		"-",
+		p.Title,
+		"-",
+		string(p.Permalink),
+	}
+	return strings.Join(chunks, " ")
+}
+
 // Subreddit holds information about a subreddit
 type Subreddit struct {
 	ID      string     `json:"id,omitempty"`