1 files changed, 86 insertions, 0 deletions
diff --git a/ui/app/components/transaction-activity-log/transaction-activity-log.util.js b/ui/app/components/transaction-activity-log/transaction-activity-log.util.js
new file mode 100644
index 000000000..97aa9a8f1
--- /dev/null
+++ b/ui/app/components/transaction-activity-log/transaction-activity-log.util.js
@@ -0,0 +1,86 @@
+// path constants
+const STATUS_PATH = '/status'
+const GAS_PRICE_PATH = '/txParams/gasPrice'
+
+// status constants
+const UNAPPROVED_STATUS = 'unapproved'
+const SUBMITTED_STATUS = 'submitted'
+const CONFIRMED_STATUS = 'confirmed'
+const DROPPED_STATUS = 'dropped'
+
+// op constants
+const REPLACE_OP = 'replace'
+
+// event constants
+const TRANSACTION_CREATED_EVENT = 'transactionCreated'
+const TRANSACTION_UPDATED_GAS_EVENT = 'transactionUpdatedGas'
+const TRANSACTION_SUBMITTED_EVENT = 'transactionSubmitted'
+const TRANSACTION_CONFIRMED_EVENT = 'transactionConfirmed'
+const TRANSACTION_DROPPED_EVENT = 'transactionDropped'
+const TRANSACTION_UPDATED_EVENT = 'transactionUpdated'
+
+const eventPathsHash = {
+  [STATUS_PATH]: true,
+  [GAS_PRICE_PATH]: true,
+}
+
+const statusHash = {
+  [SUBMITTED_STATUS]: TRANSACTION_SUBMITTED_EVENT,
+  [CONFIRMED_STATUS]: TRANSACTION_CONFIRMED_EVENT,
+  [DROPPED_STATUS]: TRANSACTION_DROPPED_EVENT,
+}
+
+function eventCreator (eventKey, timestamp, value) {
+  return {
+    eventKey,
+    timestamp,
+    value,
+  }
+}
+
+export function getActivities (transaction) {
+  const { history = [] } = transaction
+
+  return history.reduce((acc, base) => {
+    // First history item should be transaction creation
+    if (!Array.isArray(base) && base.status === UNAPPROVED_STATUS && base.txParams) {
+      const { time, txParams: { value } = {} } = base
+      return acc.concat(eventCreator(TRANSACTION_CREATED_EVENT, time, value))
+      // An entry in the history may be an array of more sub-entries.
+    } else if (Array.isArray(base)) {
+      const events = []
+
+      base.forEach(entry => {
+        const { op, path, value, timestamp: entryTimestamp } = entry
+        // Not all sub-entries in a history entry have a timestamp. If the sub-entry does not have a
+        // timestamp, the first sub-entry in a history entry should.
+        const timestamp = entryTimestamp || base[0] && base[0].timestamp
+
+        if (path in eventPathsHash && op === REPLACE_OP) {
+          switch (path) {
+            case STATUS_PATH: {
+              if (value in statusHash) {
+                events.push(eventCreator(statusHash[value], timestamp))
+              }
+
+              break
+            }
+
+            case GAS_PRICE_PATH: {
+              events.push(eventCreator(TRANSACTION_UPDATED_GAS_EVENT, timestamp, value))
+              break
+            }
+
+            default: {
+              events.push(eventCreator(TRANSACTION_UPDATED_EVENT, timestamp))
+            }
+          }
+        }
+      })
+
+      return acc.concat(events)
+    }
+
+    return acc
+  }, [])
+}