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// Copyright 2020 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 gitgraph
import (
"bytes"
"fmt"
)
// NewGraph creates a basic graph
func NewGraph() *Graph {
graph := &Graph{}
graph.relationCommit = &Commit{
Row: -1,
Column: -1,
}
graph.Flows = map[int64]*Flow{}
return graph
}
// Graph represents a collection of flows
type Graph struct {
Flows map[int64]*Flow
Commits []*Commit
MinRow int
MinColumn int
MaxRow int
MaxColumn int
relationCommit *Commit
}
// Width returns the width of the graph
func (graph *Graph) Width() int {
return graph.MaxColumn - graph.MinColumn + 1
}
// Height returns the height of the graph
func (graph *Graph) Height() int {
return graph.MaxRow - graph.MinRow + 1
}
// AddGlyph adds glyph to flows
func (graph *Graph) AddGlyph(row, column int, flowID int64, color int, glyph byte) {
flow, ok := graph.Flows[flowID]
if !ok {
flow = NewFlow(flowID, color, row, column)
graph.Flows[flowID] = flow
}
flow.AddGlyph(row, column, glyph)
if row < graph.MinRow {
graph.MinRow = row
}
if row > graph.MaxRow {
graph.MaxRow = row
}
if column < graph.MinColumn {
graph.MinColumn = column
}
if column > graph.MaxColumn {
graph.MaxColumn = column
}
}
// AddCommit adds a commit at row, column on flowID with the provided data
func (graph *Graph) AddCommit(row, column int, flowID int64, data []byte) error {
commit, err := NewCommit(row, column, data)
if err != nil {
return err
}
commit.Flow = flowID
graph.Commits = append(graph.Commits, commit)
graph.Flows[flowID].Commits = append(graph.Flows[flowID].Commits, commit)
return nil
}
// NewFlow creates a new flow
func NewFlow(flowID int64, color, row, column int) *Flow {
return &Flow{
ID: flowID,
ColorNumber: color,
MinRow: row,
MinColumn: column,
MaxRow: row,
MaxColumn: column,
}
}
// Flow represents a series of glyphs
type Flow struct {
ID int64
ColorNumber int
Glyphs []Glyph
Commits []*Commit
MinRow int
MinColumn int
MaxRow int
MaxColumn int
}
// Color16 wraps the color numbers around mod 16
func (flow *Flow) Color16() int {
return flow.ColorNumber % 16
}
// AddGlyph adds glyph at row and column
func (flow *Flow) AddGlyph(row, column int, glyph byte) {
if row < flow.MinRow {
flow.MinRow = row
}
if row > flow.MaxRow {
flow.MaxRow = row
}
if column < flow.MinColumn {
flow.MinColumn = column
}
if column > flow.MaxColumn {
flow.MaxColumn = column
}
flow.Glyphs = append(flow.Glyphs, Glyph{
row,
column,
glyph,
})
}
// Glyph represents a co-ordinate and glyph
type Glyph struct {
Row int
Column int
Glyph byte
}
// RelationCommit represents an empty relation commit
var RelationCommit = &Commit{
Row: -1,
}
// NewCommit creates a new commit from a provided line
func NewCommit(row, column int, line []byte) (*Commit, error) {
data := bytes.SplitN(line, []byte("|"), 7)
if len(data) < 7 {
return nil, fmt.Errorf("malformed data section on line %d with commit: %s", row, string(line))
}
return &Commit{
Row: row,
Column: column,
// 0 matches git log --pretty=format:%d => ref names, like the --decorate option of git-log(1)
Branch: string(data[0]),
// 1 matches git log --pretty=format:%H => commit hash
Rev: string(data[1]),
// 2 matches git log --pretty=format:%ad => author date (format respects --date= option)
Date: string(data[2]),
// 3 matches git log --pretty=format:%an => author name
Author: string(data[3]),
// 4 matches git log --pretty=format:%ae => author email
AuthorEmail: string(data[4]),
// 5 matches git log --pretty=format:%h => abbreviated commit hash
ShortRev: string(data[5]),
// 6 matches git log --pretty=format:%s => subject
Subject: string(data[6]),
}, nil
}
// Commit represents a commit at co-ordinate X, Y with the data
type Commit struct {
Flow int64
Row int
Column int
Branch string
Rev string
Date string
Author string
AuthorEmail string
ShortRev string
Subject string
}
// OnlyRelation returns whether this a relation only commit
func (c *Commit) OnlyRelation() bool {
return c.Row == -1
}
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