starting on the commit logic

common/database/db-ops.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 
 	"github.com/asdine/storm"
+	"github.com/asdine/storm/q"
 )
 
 // ConfigureDB sets up bolt and Storm according to the path of the database
@@ -187,3 +188,39 @@ func (db *DB) UpdateDescription(patchID int, description string) error {
 	}
 	return nil
 }
+
+// FetchCommitByNumber fetches the commit number of the passed branch
+func (db *DB) FetchCommitByNumber(branch string, commitNumber string) (commitResult Commit, err error) {
+	var commit Commit
+	db.Info().Msgf("fetching commit by number: %s in branch: %s", commitNumber, branch)
+	query := db.Select(q.And(q.Eq("Branch", branch), q.Eq("Number", commitNumber)))
+	err = query.Find(&commit)
+	if err != nil {
+		db.Err(err).Msgf("Failed to find commit by number: %s on branch: %s", commitNumber, branch)
+		return commit, err
+	}
+	return commit, nil
+}
+
+// FetchCommitByHash fetches a single commit on any branch by hash //TODO: Hash collision?
+func (db *DB) FetchCommitByHash(hash string) (commitResult Commit, err error) {
+	var commit Commit
+	db.Info().Msgf("Searching for commit by hash: %s", hash)
+	if err := db.One("CommitHash", hash, &commit); err != nil {
+		db.Err(err).Msgf("Failed to find commit by hash: %s", hash)
+		return commit, err
+	}
+	return commit, nil
+}
+
+// FetchLastCommitOnBranch gets the latest commit to the provided branch
+func (db *DB) FetchLastCommitOnBranch(branch string) (commitResult Commit, err error) {
+	var commit Commit
+	db.Info().Msgf("Fetching last commit on branch: %s", branch)
+	query := db.Select(q.Eq("Branch", branch))             //Selecting everything that applies to that branch
+	err = query.OrderBy("Number").Reverse().First(&commit) // Getting the last entry by number
+	if err != nil {
+		db.Err(err).Msgf("Failed to find last commit on branch: %s", branch)
+	}
+	return commit, nil
+}