1 files changed, 196 insertions, 0 deletions
diff --git a/package.sort.go b/package.sort.go
new file mode 100644
index 0000000..0dead0a
--- /dev/null
+++ b/package.sort.go
@@ -0,0 +1,196 @@
+package zoopb
+
+// this is becoming a standard format
+// todo: autogenerate this from the .proto file?
+
+import (
+	"fmt"
+	"os"
+	"sort"
+	sync "sync"
+	"time"
+
+	timestamppb "google.golang.org/protobuf/types/known/timestamppb"
+)
+
+// bad global lock until I figure out some other plan
+var lock sync.RWMutex
+
+type PackageIterator struct {
+	sync.RWMutex
+
+	packs []*Package
+	index int
+}
+
+// NewPackageIterator initializes a new iterator.
+func NewPackageIterator(packs []*Package) *PackageIterator {
+	return &PackageIterator{packs: packs}
+}
+
+// Scan moves to the next element and returns false if there are no more packs.
+func (it *PackageIterator) Scan() bool {
+	if it.index >= len(it.packs) {
+		return false
+	}
+	it.index++
+	return true
+}
+
+// Package returns the current repo.
+func (it *PackageIterator) Package() *Package {
+	if it.packs[it.index-1] == nil {
+		for i, d := range it.packs {
+			fmt.Println("i =", i, d)
+		}
+		fmt.Println("len =", len(it.packs))
+		fmt.Println("repo == nil", it.index, it.index-1)
+		os.Exit(-1)
+	}
+	return it.packs[it.index-1]
+}
+
+// Use Scan() in a loop, similar to a while loop
+//
+//	for iterator.Scan() {
+//		d := iterator.Package()
+//		fmt.Println("Package UUID:", d.Uuid)
+//	}
+
+func (r *Packages) All() *PackageIterator {
+	repoPointers := r.selectAllPackages()
+
+	iterator := NewPackageIterator(repoPointers)
+	return iterator
+}
+
+func (r *Packages) SortByName() *PackageIterator {
+	packs := r.selectAllPackages()
+
+	sort.Sort(ByName(packs))
+
+	iterator := NewPackageIterator(packs)
+	return iterator
+}
+
+// enforces no duplicate package names
+func (r *Packages) Append(newP *Package) bool {
+	lock.Lock()
+	defer lock.Unlock()
+
+	for _, p := range r.Packages {
+		if p.Name == newP.Name {
+			return false
+		}
+	}
+
+	r.Packages = append(r.Packages, newP)
+	return true
+}
+
+// Update version and timestamp.
+// returns ok (ok == true if not found)
+func (r *Packages) Update(newP *Package) bool {
+	lock.Lock()
+	defer lock.Unlock()
+
+	var found *Package
+	for _, p := range r.Packages {
+		if p.Name == newP.Name {
+			found = p
+		}
+	}
+	if found == nil {
+		// r.Append(newP) // update here?
+		return true
+	}
+
+	var changed bool = false
+	if newP.Version != found.Version {
+		changed = true
+		found.Version = newP.Version
+	}
+
+	now := time.Now()
+	found.Laststamp = timestamppb.New(now)
+	return changed
+}
+
+// returns time.Duration since last Update()
+func (r *Package) Age(newP *Package) time.Duration {
+	t := time.Since(r.Laststamp.AsTime())
+	return t
+}
+
+// find a package by name
+func (r *Packages) FindByName(name string) *Package {
+	lock.RLock()
+	defer lock.RUnlock()
+
+	for _, p := range r.Packages {
+		if p.Name == name {
+			return p
+		}
+	}
+
+	return nil
+}
+
+func (r *Packages) Len() int {
+	lock.RLock()
+	defer lock.RUnlock()
+
+	return len(r.Packages)
+}
+
+type ByName []*Package
+
+func (a ByName) Len() int           { return len(a) }
+func (a ByName) Less(i, j int) bool { return a[i].Name < a[j].Name }
+func (a ByName) Swap(i, j int)      { a[i], a[j] = a[j], a[i] }
+
+// safely returns a slice of pointers to the Package protobufs
+func (r *Packages) selectAllPackages() []*Package {
+	lock.RLock()
+	defer lock.RUnlock()
+
+	// Create a new slice to hold pointers to each Package
+	var allPacks []*Package
+	allPacks = make([]*Package, len(r.Packages))
+	for i, p := range r.Packages {
+		allPacks[i] = p // Copy pointers for safe iteration
+	}
+
+	return allPacks
+}
+
+/*
+func (r *Packages) UnmergedPackageRepos() *PackageRepoIterator {
+	repoPointers := r.selectUnmergedPackageRepos()
+
+	sort.Sort(ByName(repoPointers))
+
+	iterator := NewPackageRepoIterator(repoPointers)
+
+	return iterator
+}
+*/
+
+/*
+// this sort doesn't really work. I think it forgets to sort the last two
+// todo: sort this out. literally
+// SelectPackagePointers safely returns a slice of pointers to Package records.
+func (r *Packages) selectUnmergedPackages() []*PackageRow {
+	r.RLock()
+	defer r.RUnlock()
+
+	// Create a new slice to hold pointers to each Package
+	// repoPointers := make([]*Package, len(c.E.Packages))
+	var repoPointers []*PackageRow
+	for _, repo := range me.allrepos {
+		repoPointers = append(repoPointers, repo) // Copy pointers for safe iteration
+	}
+
+	return repoPointers
+}
+*/