Implement the tasks grammar

grammar/task.pegjs

@@ -1,6 +1,119 @@
-start = task
+start = _ @(task / line) _
 
-task = "-" _ "[" status:. "]" { return status; }
+/**************************************************************************************************************************************/
+
+line = data:.+ {
+  return {
+    type: "line",
+    data: data.join("")
+  }
+}
+
+/**************************************************************************************************************************************/
+
+task = "-" _ "[" status:. "]" _ label:label meta:meta* { 
+  return { 
+    type: "task",
+    data: {
+      status, 
+      label,
+      meta
+    }
+  }; 
+}
+
+label = text:([^⏬🔽🔼⏫🔺➕⏳🛫📅✅❌🔁🏁🆔⛔⏰]*) {
+  return text.join("").trim()
+}
+
+meta = _ @(date / recurrence / delete / priority / dependency / reminder) _
+
+/**************************************************************************************************************************************/
+
+priority = priority:priorityIcon {
+  return {
+    feature: "priority",
+    priority
+  }
+}
+
+/**************************************************************************************************************************************/
+
+delete = type:deleteIcon _ action:[a-zA-Z]+ { 
+  return {
+    feature: "delete",
+    action: action.join("").trim()
+  }
+}
+
+/**************************************************************************************************************************************/
+
+reminder = reminderIcon _ time:(longTime / shortTime)? {
+  return {
+    feature: "reminder",
+    time
+  }
+}
+
+longTime = hour:[0-9]|1..2| ":" minute:[0-9]|1..2| {
+  return `${hour.join("").padStart(2, '0')}:${minute.join("").padStart(2, '0')}`;
+}
+
+shortTime = hour:[0-9]|1..2| {
+  return `${hour.join("").padStart(2, '0')}:00`;
+}
+
+/**************************************************************************************************************************************/
+
+recurrence = type:recurrenceIcon _ rec:[a-zA-Z0-9 ]+ { 
+  return {
+    feature: "recurrence",
+    rule: rec.join("").trim()
+  }
+}
+
+/**************************************************************************************************************************************/
+
+date = type:dateIcon _ date:dateLiteral { 
+  return {
+    feature: "date",
+    type,
+    date
+  };
+}
+
+dateLiteral = year:([0-9]|4|) "-" month:([0-9]|1..2|) "-" day:([0-9]|1..2|) { 
+  return `${year.join("")}-${month.join("").padStart(2, '0')}-${day.join("").padStart(2, '0')}`; 
+}
+
+/**************************************************************************************************************************************/
+
+dependency = type:dependencyIcon _ deps:([a-zA-Z0-9]+)|..,(_ "," _)| {
+  return {
+    feature: "dependency",
+    type,
+    deps: deps.map(x => x.join(""))
+  }
+}
+
+/**************************************************************************************************************************************/
+
+allIcons = dependencyIcon / recurrenceIcon / deleteIcon / reminderIcon / dateIcon / priority
+dependencyIcon = "🆔" / "⛔"
+recurrenceIcon = "🔁"
+deleteIcon = "🏁"
+reminderIcon = "⏰"
+dateIcon = "➕"
+          /"⏳"
+          /"🛫"
+          /"📅"
+          /"✅"
+          /"❌"
+priorityIcon = "⏬"
+              /"🔽"
+              /"🔼"
+              /"⏫"
+              /"🔺"          
 
 _ "whitespace"
-  = [ \t\n\r]*
+  = [ \t\r]*