support type of PR comment

app/models/type.go

@@ -93,8 +93,12 @@ func (t *Type) GetAllTypesFor(orgName string, repoName string) ([]Type, error) {
 
 	return ret, err
 }
-func (t *Type) GetBranchTypesFor(orgName string, repoName string, branches []string) ([]Type, error) {
+func (t *Type) GetBranchTypesFor(orgName string, repoName string, branches []string, typeName string) ([]Type, error) {
 	var ret []Type
+	andWhereType := ""
+	if typeName != "" {
+		andWhereType = "AND t.name = @typeName"
+	}
 
 	query := `SELECT t.* FROM types t
 			LEFT JOIN
@@ -109,13 +113,15 @@ func (t *Type) GetBranchTypesFor(orgName string, repoName string, branches []str
 				r.name = @repoName
 			AND
 				c.branch_name IN @branches
+			` + andWhereType + `
 			GROUP BY t.id
 			LIMIT @limit`
 
 	err := db.Db().Raw(query,
 		sql.Named("orgName", orgName),
 		sql.Named("repoName", repoName),
 		sql.Named("branches", branches),
+		sql.Named("typeName", typeName),
 		sql.Named("limit", SAFE_LIMIT_TYPES)).
 		Scan(&ret).Error
 	if err != nil {

app/pkg/pr.go

@@ -30,8 +30,8 @@ func (p *PR) Get(req *PRRequest, types []models.Type) (string, error) {
 		Header: []string{"Type", req.BaseBranch, req.Branch},
 		Rows:   [][]string{},
 	}
-	urls := []string{}
-	chUrls := []string{}
+	urls := []string{}   // stores urls for bar charts for comparison of base and branch
+	chUrls := []string{} // stores urls for commit history trends (line charts)
 	mdText.H4("CoverItUp Report")
 	mdText.PlainText("")
 
@@ -124,7 +124,7 @@ func (p *PR) UpOrDown(baseScore *float64, branchScore *float64) string {
 
 func (p *PR) TypesChangedSince(req *PRRequest) ([]models.Type, error) {
 	typesChanged := []models.Type{}
-	types, err := p.typeModel.GetBranchTypesFor(req.Org, req.Repo, []string{req.BaseBranch, req.Branch})
+	types, err := p.typeModel.GetBranchTypesFor(req.Org, req.Repo, []string{req.BaseBranch, req.Branch}, req.Type)
 	if err != nil {
 		return typesChanged, err
 	}

app/pkg/pr_handler.go

@@ -25,6 +25,7 @@ type PRRequest struct {
 	BaseBranch string `json:"base_branch" query:"base_branch" validate:"required,ascii" message:"ascii base_branch is required"`
 	PRNum      int    `json:"pr_num" query:"pr_num"`
 	Theme      string `json:"theme" query:"theme" default:"light" validate:"oneof=light dark" message:"theme must be light or dark"`
+	Type       string `json:"type" query:"type" validate:"ascii" message:"ascii type is required"`
 
 	host   string
 	scheme string