From f5f268dff727e1f84306fd4777222e0021b481f9 Mon Sep 17 00:00:00 2001
From: Tai Groot <tai@taigrr.com>
Date: Mon, 6 Feb 2023 23:03:15 -0800
Subject: [PATCH] atart work on caching repos

---
 commits/cache.go | 22 ++++++++++++++++++++++
 types/types.go   | 15 +++++++++------
 2 files changed, 31 insertions(+), 6 deletions(-)

diff --git a/commits/cache.go b/commits/cache.go
index d36f03d..ded46a2 100644
--- a/commits/cache.go
+++ b/commits/cache.go
@@ -14,10 +14,32 @@ import (
 var (
 	mapTex    sync.RWMutex
 	hashCache map[int]map[string]map[string]types.ExpFreq
+	// the Repo Cache holds a list of all commits from HEAD back to parent
+	// the key is the repo path
+	// if the hash of the first commit / HEAD commit doesn't match the current HEAD,
+	// then it can be discarded and reloaded
+	repoCache map[string][]types.Commit
 )
 
 func init() {
 	hashCache = make(map[int]map[string]map[string]types.ExpFreq)
+	repoCache = make(map[string][]types.Commit)
+}
+
+func IsRepoCached(path string, head string) bool {
+	mapTex.RLock()
+	defer mapTex.RUnlock()
+	if commits, ok := repoCache[path]; !ok {
+		return false
+	} else {
+		return len(commits) > 0 && commits[0].Hash == head
+	}
+}
+
+func CacheRepo(path string, commits []types.Commit) {
+	mapTex.Lock()
+	defer mapTex.Unlock()
+	repoCache[path] = commits
 }
 
 func hashSlice(in []string) string {
diff --git a/types/types.go b/types/types.go
index c9d4087..0f9dbc8 100644
--- a/types/types.go
+++ b/types/types.go
@@ -7,12 +7,15 @@ import (
 type (
 	Month  string
 	Commit struct {
-		LOC       int       `json:"loc,omitempty"`
-		Message   string    `json:"message,omitempty"`
-		TimeStamp time.Time `json:"ts,omitempty"`
-		Author    string    `json:"author,omitempty"`
-		Repo      string    `json:"repo,omitempty"`
-		Path      string    `json:"path,omitempty"`
+		Deleted      int       `json:"deleted,omitempty"`
+		Added        int       `json:"added,omitempty"`
+		FilesChanged int       `json:"files_changed,omitempty"`
+		Message      string    `json:"message,omitempty"`
+		Hash         string    `json:"hash,omitempty"`
+		TimeStamp    time.Time `json:"ts,omitempty"`
+		Author       string    `json:"author,omitempty"`
+		Repo         string    `json:"repo,omitempty"`
+		Path         string    `json:"path,omitempty"`
 	}
 	DataSet map[time.Time]WorkDay
 	Freq    []int