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package todolist
type Grouper struct{}
type GroupedTodos struct {
Groups map[string][]Todo
}
func (g *Grouper) GroupByContext(todos []Todo) *GroupedTodos {
groups := map[string][]Todo{}
allContexts := []string{}
for _, todo := range todos {
allContexts = addIfNotThere(allContexts, todo.Contexts)
}
for _, todo := range todos {
for _, context := range todo.Contexts {
groups[context] = append(groups[context], todo)
}
}
return &GroupedTodos{Groups: groups}
}
func (g *Grouper) GroupByProject(todos []Todo) *GroupedTodos {
groups := map[string][]Todo{}
allProjects := []string{}
for _, todo := range todos {
allProjects = addIfNotThere(allProjects, todo.Projects)
}
for _, todo := range todos {
for _, project := range todo.Projects {
groups[project] = append(groups[project], todo)
}
}
return &GroupedTodos{Groups: groups}
}
func (g *Grouper) GroupByNothing(todos []Todo) *GroupedTodos {
groups := map[string][]Todo{}
groups["all"] = todos
return &GroupedTodos{Groups: groups}
}
func addIfNotThere(arr []string, items []string) []string {
for _, item := range items {
there := false
for _, arrItem := range arr {
if item == arrItem {
there = true
}
}
if !there {
arr = append(arr, item)
}
}
return arr
}
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