Adding Simulation API

policy/common/actor.go

@@ -26,17 +26,17 @@ import (
 // team and organization memberships. The set of allowed actors is the union of
 // all conditions in this structure.
 type Actors struct {
-	Users         []string `yaml:"users"`
-	Teams         []string `yaml:"teams"`
-	Organizations []string `yaml:"organizations"`
+	Users         []string `yaml:"users" json:"users"`
+	Teams         []string `yaml:"teams" json:"teams"`
+	Organizations []string `yaml:"organizations" json:"organizations"`
 
 	// Deprecated: use Permissions with "admin" or "write"
 	Admins             bool `yaml:"admins"`
 	WriteCollaborators bool `yaml:"write_collaborators"`
 
 	// A list of GitHub collaborator permissions that are allowed. Values may
 	// be any of "admin", "maintain", "write", "triage", and "read".
-	Permissions []pull.Permission
+	Permissions []pull.Permission `json:"permissions"`
 }
 
 // IsEmpty returns true if no conditions for actors are defined.

policy/simulated/context.go

@@ -0,0 +1,135 @@
+// Copyright 2018 Palantir Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package simulated
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/palantir/policy-bot/pull"
+)
+
+type Context struct {
+	pull.Context
+	ctx     context.Context
+	options Options
+}
+
+func NewContext(ctx context.Context, pullContext pull.Context, options Options) *Context {
+	return &Context{Context: pullContext, options: options}
+}
+
+func (c *Context) Comments() ([]*pull.Comment, error) {
+	comments, err := c.Context.Comments()
+	if err != nil {
+		return nil, err
+	}
+
+	comments, err = c.filterIgnoredComments(c.Context, comments)
+	if err != nil {
+		return nil, err
+	}
+
+	comments = c.addApprovalComment(comments)
+	return comments, nil
+}
+
+func (c *Context) filterIgnoredComments(prCtx pull.Context, comments []*pull.Comment) ([]*pull.Comment, error) {
+	if c.options.IgnoreComments == nil {
+		return comments, nil
+	}
+
+	var filteredComments []*pull.Comment
+	for _, comment := range comments {
+		isActor, err := c.options.IgnoreComments.IsActor(c.ctx, prCtx, comment.Author)
+		if err != nil {
+			return nil, err
+		}
+
+		if isActor {
+			continue
+		}
+
+		filteredComments = append(filteredComments, comment)
+	}
+
+	return filteredComments, nil
+}
+
+func (c *Context) addApprovalComment(comments []*pull.Comment) []*pull.Comment {
+	var commentsToAdd []*pull.Comment
+	for _, comment := range c.options.AddComments {
+		commentsToAdd = append(commentsToAdd, &comment)
+	}
+
+	return append(comments, commentsToAdd...)
+}
+
+func (c *Context) Reviews() ([]*pull.Review, error) {
+	reviews, err := c.Context.Reviews()
+	if err != nil {
+		return nil, err
+	}
+
+	reviews, err = c.filterIgnoredReviews(c.Context, reviews)
+	if err != nil {
+		return nil, err
+	}
+
+	reviews = c.addApprovalReview(reviews)
+	return reviews, nil
+}
+
+func (c *Context) filterIgnoredReviews(prCtx pull.Context, reviews []*pull.Review) ([]*pull.Review, error) {
+	if c.options.IgnoreReviews == nil {
+		return reviews, nil
+	}
+
+	var filteredReviews []*pull.Review
+	for _, review := range reviews {
+		isActor, err := c.options.IgnoreReviews.IsActor(c.ctx, prCtx, review.Author)
+		if err != nil {
+			return nil, err
+		}
+
+		if isActor {
+			continue
+		}
+
+		filteredReviews = append(filteredReviews, review)
+	}
+
+	return filteredReviews, nil
+}
+
+func (c *Context) addApprovalReview(reviews []*pull.Review) []*pull.Review {
+	var reviewsToAdd []*pull.Review
+	for i, review := range c.options.AddReviews {
+		review.ID = fmt.Sprintf("simulated-reviewID-%d", i)
+		review.SHA = fmt.Sprintf("simulated-reviewSHA-%d", i)
+		reviewsToAdd = append(reviewsToAdd, &review)
+	}
+
+	return append(reviews, reviewsToAdd...)
+}
+
+func (c *Context) Branches() (string, string) {
+	base, head := c.Context.Branches()
+	if c.options.BaseBranch != "" {
+		return c.options.BaseBranch, head
+	}
+
+	return base, head
+}