From 6855244424cd8370a61cdc337d3102625c135408 Mon Sep 17 00:00:00 2001
From: Scott <scott@ausocean.org>
Date: Tue, 18 Feb 2020 15:45:48 +1030
Subject: [PATCH 1/2] mts/meta: created NewFromMap method

---
 container/mts/meta/meta.go | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/container/mts/meta/meta.go b/container/mts/meta/meta.go
index 0e67aa96..8bcdf464 100644
--- a/container/mts/meta/meta.go
+++ b/container/mts/meta/meta.go
@@ -90,6 +90,17 @@ func NewWith(data [][2]string) *Data {
 	return m
 }
 
+// NewFromMap creates a meta.Data from a map.
+func NewFromMap(data map[string]string) *Data {
+	m := New()
+	m.order = make([]string, 0, len(data))
+	for k, v := range data {
+		m.data[k] = v
+		m.order = append(m.order, k)
+	}
+	return m
+}
+
 // Add adds metadata with key and val.
 func (m *Data) Add(key, val string) {
 	m.mu.Lock()

From cca292ea17baa356a923be35b19fc546867dbe30 Mon Sep 17 00:00:00 2001
From: Scott <scott@ausocean.org>
Date: Wed, 19 Feb 2020 09:28:57 +1030
Subject: [PATCH 2/2] mts/meta: created EncodeAsString and GetAllFromString
 methods

---
 container/mts/meta/meta.go | 25 ++++++++++++++++++++++++-
 1 file changed, 24 insertions(+), 1 deletion(-)

diff --git a/container/mts/meta/meta.go b/container/mts/meta/meta.go
index 8bcdf464..d3c6a8a9 100644
--- a/container/mts/meta/meta.go
+++ b/container/mts/meta/meta.go
@@ -178,6 +178,23 @@ func (m *Data) Encode() []byte {
 	return m.enc
 }
 
+// EncodeAsString takes the meta data map and encodes into a string with the data in
+// TSV format. Unlike encode, the header with version and length of data is not
+// included. This method is used for storing metadata in the store on vidgrind.
+func (m *Data) EncodeAsString() string {
+	// Iterate over map and append entries, only adding tab if we're not on the
+	// last entry.
+	var str string
+	for i, k := range m.order {
+		v := m.data[k]
+		str += k + "=" + v
+		if i+1 < len(m.data) {
+			str += "\t"
+		}
+	}
+	return str
+}
+
 // Keys returns all keys in a slice of metadata d.
 func Keys(d []byte) ([]string, error) {
 	m, err := GetAll(d)
@@ -238,9 +255,15 @@ func GetAllAsMap(d []byte) (map[string]string, error) {
 	// Skip the header, which is our data length and version.
 	d = d[headSize:]
 
+	return GetAllFromString(string(d))
+}
+
+// GetAllFromString returns a map containing keys and values from a string s containing
+// metadata.
+func GetAllFromString(s string) (map[string]string, error) {
 	// Each metadata entry (key and value) is seperated by a tab, so split at tabs
 	// to get individual entries.
-	entries := strings.Split(string(d), "\t")
+	entries := strings.Split(s, "\t")
 
 	// Go through entries and add to all map.
 	all := make(map[string]string)