feat(github): add actions to comment and read PRs (#26)

Signed-off-by: mudler <mudler@localai.io>

services/actions/githubprreader.go

@@ -0,0 +1,164 @@
+package actions
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/google/go-github/v69/github"
+	"github.com/mudler/LocalAGI/core/types"
+	"github.com/mudler/LocalAGI/pkg/config"
+	"github.com/sashabaranov/go-openai/jsonschema"
+)
+
+type GithubPRReader struct {
+	token, repository, owner, customActionName string
+	showFullDiff                               bool
+	client                                     *github.Client
+}
+
+func NewGithubPRReader(config map[string]string) *GithubPRReader {
+	client := github.NewClient(nil).WithAuthToken(config["token"])
+
+	showFullDiff := false
+	if config["showFullDiff"] == "true" {
+		showFullDiff = true
+	}
+
+	return &GithubPRReader{
+		client:           client,
+		token:            config["token"],
+		customActionName: config["customActionName"],
+		repository:       config["repository"],
+		owner:            config["owner"],
+		showFullDiff:     showFullDiff,
+	}
+}
+
+func (g *GithubPRReader) Run(ctx context.Context, params types.ActionParams) (types.ActionResult, error) {
+	result := struct {
+		Repository string `json:"repository"`
+		Owner      string `json:"owner"`
+		PRNumber   int    `json:"pr_number"`
+	}{}
+	err := params.Unmarshal(&result)
+	if err != nil {
+		return types.ActionResult{}, err
+	}
+
+	if g.repository != "" && g.owner != "" {
+		result.Repository = g.repository
+		result.Owner = g.owner
+	}
+
+	pr, _, err := g.client.PullRequests.Get(ctx, result.Owner, result.Repository, result.PRNumber)
+	if err != nil {
+		return types.ActionResult{Result: fmt.Sprintf("Error fetching pull request: %s", err.Error())}, err
+	}
+	if pr == nil {
+		return types.ActionResult{Result: fmt.Sprintf("No pull request found")}, nil
+	}
+
+	// Get the list of changed files
+	files, _, err := g.client.PullRequests.ListFiles(ctx, result.Owner, result.Repository, result.PRNumber, &github.ListOptions{})
+	if err != nil {
+		return types.ActionResult{Result: fmt.Sprintf("Error fetching pull request files: %s", err.Error())}, err
+	}
+
+	// Build the file changes summary with patches
+	fileChanges := "\n\nFile Changes:\n"
+	for _, file := range files {
+		fileChanges += fmt.Sprintf("\n--- %s\n+++ %s\n", *file.Filename, *file.Filename)
+		if g.showFullDiff && file.Patch != nil {
+			fileChanges += *file.Patch
+		}
+		fileChanges += fmt.Sprintf("\n(%d additions, %d deletions)\n", *file.Additions, *file.Deletions)
+	}
+
+	return types.ActionResult{
+		Result: fmt.Sprintf(
+			"Pull Request %d Repository: %s\nTitle: %s\nBody: %s\nState: %s\nBase: %s\nHead: %s%s",
+			*pr.Number, *pr.Base.Repo.FullName, *pr.Title, *pr.Body, *pr.State, *pr.Base.Ref, *pr.Head.Ref, fileChanges)}, nil
+}
+
+func (g *GithubPRReader) Definition() types.ActionDefinition {
+	actionName := "read_github_pr"
+	if g.customActionName != "" {
+		actionName = g.customActionName
+	}
+	description := "Read a GitHub pull request."
+	if g.repository != "" && g.owner != "" {
+		return types.ActionDefinition{
+			Name:        types.ActionDefinitionName(actionName),
+			Description: description,
+			Properties: map[string]jsonschema.Definition{
+				"pr_number": {
+					Type:        jsonschema.Number,
+					Description: "The number of the pull request to read.",
+				},
+			},
+			Required: []string{"pr_number"},
+		}
+	}
+	return types.ActionDefinition{
+		Name:        types.ActionDefinitionName(actionName),
+		Description: description,
+		Properties: map[string]jsonschema.Definition{
+			"pr_number": {
+				Type:        jsonschema.Number,
+				Description: "The number of the pull request to read.",
+			},
+			"repository": {
+				Type:        jsonschema.String,
+				Description: "The repository containing the pull request.",
+			},
+			"owner": {
+				Type:        jsonschema.String,
+				Description: "The owner of the repository.",
+			},
+		},
+		Required: []string{"pr_number", "repository", "owner"},
+	}
+}
+
+func (a *GithubPRReader) Plannable() bool {
+	return true
+}
+
+// GithubPRReaderConfigMeta returns the metadata for GitHub PR Reader action configuration fields
+func GithubPRReaderConfigMeta() []config.Field {
+	return []config.Field{
+		{
+			Name:     "token",
+			Label:    "GitHub Token",
+			Type:     config.FieldTypeText,
+			Required: true,
+			HelpText: "GitHub API token with repository access",
+		},
+		{
+			Name:     "repository",
+			Label:    "Repository",
+			Type:     config.FieldTypeText,
+			Required: false,
+			HelpText: "GitHub repository name",
+		},
+		{
+			Name:     "owner",
+			Label:    "Owner",
+			Type:     config.FieldTypeText,
+			Required: false,
+			HelpText: "GitHub repository owner",
+		},
+		{
+			Name:     "customActionName",
+			Label:    "Custom Action Name",
+			Type:     config.FieldTypeText,
+			HelpText: "Custom name for this action",
+		},
+		{
+			Name:     "showFullDiff",
+			Label:    "Show Full Diff",
+			Type:     config.FieldTypeCheckbox,
+			HelpText: "Whether to show the full diff content or just the summary",
+		},
+	}
+}