1 files changed, 118 insertions, 0 deletions
diff --git a/routers/api/packages/composer/api.go b/routers/api/packages/composer/api.go
new file mode 100644
index 0000000000..d8f67d130c
--- /dev/null
+++ b/routers/api/packages/composer/api.go
@@ -0,0 +1,118 @@
+// Copyright 2021 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package composer
+
+import (
+	"fmt"
+	"net/url"
+	"time"
+
+	packages_model "code.gitea.io/gitea/models/packages"
+	composer_module "code.gitea.io/gitea/modules/packages/composer"
+)
+
+// ServiceIndexResponse contains registry endpoints
+type ServiceIndexResponse struct {
+	SearchTemplate   string `json:"search"`
+	MetadataTemplate string `json:"metadata-url"`
+	PackageList      string `json:"list"`
+}
+
+func createServiceIndexResponse(registryURL string) *ServiceIndexResponse {
+	return &ServiceIndexResponse{
+		SearchTemplate:   registryURL + "/search.json?q=%query%&type=%type%",
+		MetadataTemplate: registryURL + "/p2/%package%.json",
+		PackageList:      registryURL + "/list.json",
+	}
+}
+
+// SearchResultResponse contains search results
+type SearchResultResponse struct {
+	Total    int64           `json:"total"`
+	Results  []*SearchResult `json:"results"`
+	NextLink string          `json:"next,omitempty"`
+}
+
+// SearchResult contains a search result
+type SearchResult struct {
+	Name        string `json:"name"`
+	Description string `json:"description"`
+	Downloads   int64  `json:"downloads"`
+}
+
+func createSearchResultResponse(total int64, pds []*packages_model.PackageDescriptor, nextLink string) *SearchResultResponse {
+	results := make([]*SearchResult, 0, len(pds))
+
+	for _, pd := range pds {
+		results = append(results, &SearchResult{
+			Name:        pd.Package.Name,
+			Description: pd.Metadata.(*composer_module.Metadata).Description,
+			Downloads:   pd.Version.DownloadCount,
+		})
+	}
+
+	return &SearchResultResponse{
+		Total:    total,
+		Results:  results,
+		NextLink: nextLink,
+	}
+}
+
+// PackageMetadataResponse contains packages metadata
+type PackageMetadataResponse struct {
+	Minified string                               `json:"minified"`
+	Packages map[string][]*PackageVersionMetadata `json:"packages"`
+}
+
+// PackageVersionMetadata contains package metadata
+type PackageVersionMetadata struct {
+	*composer_module.Metadata
+	Name    string    `json:"name"`
+	Version string    `json:"version"`
+	Type    string    `json:"type"`
+	Created time.Time `json:"time"`
+	Dist    Dist      `json:"dist"`
+}
+
+// Dist contains package download informations
+type Dist struct {
+	Type     string `json:"type"`
+	URL      string `json:"url"`
+	Checksum string `json:"shasum"`
+}
+
+func createPackageMetadataResponse(registryURL string, pds []*packages_model.PackageDescriptor) *PackageMetadataResponse {
+	versions := make([]*PackageVersionMetadata, 0, len(pds))
+
+	for _, pd := range pds {
+		packageType := ""
+		for _, pvp := range pd.Properties {
+			if pvp.Name == composer_module.TypeProperty {
+				packageType = pvp.Value
+				break
+			}
+		}
+
+		versions = append(versions, &PackageVersionMetadata{
+			Name:     pd.Package.Name,
+			Version:  pd.Version.Version,
+			Type:     packageType,
+			Created:  time.Unix(int64(pd.Version.CreatedUnix), 0),
+			Metadata: pd.Metadata.(*composer_module.Metadata),
+			Dist: Dist{
+				Type:     "zip",
+				URL:      fmt.Sprintf("%s/files/%s/%s/%s", registryURL, url.PathEscape(pd.Package.LowerName), url.PathEscape(pd.Version.LowerVersion), url.PathEscape(pd.Files[0].File.LowerName)),
+				Checksum: pd.Files[0].Blob.HashSHA1,
+			},
+		})
+	}
+
+	return &PackageMetadataResponse{
+		Minified: "composer/2.0",
+		Packages: map[string][]*PackageVersionMetadata{
+			pds[0].Package.Name: versions,
+		},
+	}
+}