Add support for preference strengths

src/bolt/chores.app.js

@@ -302,11 +302,11 @@ app.view('chores-rank-callback', async ({ ack, body }) => {
   const houseId = body.team.id;
 
   const direction = body.view.private_metadata;
-  const targetChore = JSON.parse(common.getInputBlock(body, -2).chores.selected_option.value);
-  const sourceChores = common.getInputBlock(body, -1).chores.selected_options
+  const targetChore = JSON.parse(common.getInputBlock(body, -3).chores.selected_option.value);
+  const sourceChores = common.getInputBlock(body, -2).chores.selected_options
     .map(option => JSON.parse(option.value));
 
-  const strength = 100 / 200 + 0.5; // Scale (0, 100) -> (0.5, 1.0)
+  const { strength } = JSON.parse(common.getInputBlock(body, -1).strength.selected_option.value);
   const preference = (direction === 'faster') ? strength : 1 - strength;
 
   // Perform the update
@@ -324,15 +324,15 @@ app.view('chores-rank-callback', async ({ ack, body }) => {
   const changeText = (Math.abs(change) > bigChange) ? 'a lot' : 'a little';
 
   if (change > 0) {
-    const text = `Someone prioritized *${targetChore.name}* by *${changeText}*, to *${priority} ppt* :rocket:`;
+    const text = `Someone *prioritized ${targetChore.name}* by ${changeText}, to *${priority} ppt* :rocket:`;
     await postMessage(houseId, text);
   } else if (change < 0) {
-    const text = `Someone deprioritized *${targetChore.name}* by *${changeText}*, to *${priority} ppt* :snail:`;
+    const text = `Someone *deprioritized ${targetChore.name}* by ${changeText}, to *${priority} ppt* :snail:`;
     await postMessage(houseId, text);
   } else {
     const text = 'You\'ve already input those preferences.\n\n' +
-      'To have an additional effect, *choose more or different chores*. ' +
-      'Alternatively, *convince others* to support your priorities.';
+      'To have an additional effect, *choose more or different chores* or a *stronger preference*.\n' +
+      'Alternatively, try and *convince others* to support your priorities.';
     await postEphemeral(houseId, residentId, text);
   }
 });

src/bolt/chores.views.js

@@ -292,6 +292,11 @@ exports.choresRankView2 = function (direction, choreRankings) {
     };
   });
 
+  const preferenceOptions = [
+    { value: JSON.stringify({ strength: 0.7 }), text: common.blockPlaintext('Mild (70%)') },
+    { value: JSON.stringify({ strength: 1.0 }), text: common.blockPlaintext('Strong (100%)') },
+  ];
+
   const header = 'Set chore priorities';
   const mainText = 'Choose chores to update. ' +
     'Chore priorities are measured in *points-per-thousand* (ppt) and always add up to *1000*. ' +
@@ -301,7 +306,8 @@ exports.choresRankView2 = function (direction, choreRankings) {
     '*Some things to keep in mind:*\n\n' +
     '*1.* Taking from *more chores* has a bigger effect.\n' +
     '*2.* Taking from *high-priority chores* has a bigger effect.\n' +
-    '*3.* *More participants* have a bigger effect.';
+    '*3.* A *strong preference* has a bigger effect.\n' +
+    '*4.* *More participants* have a bigger effect.';
 
   const textA = direction === 'faster'
     ? 'Chore to prioritize'
@@ -339,6 +345,16 @@ exports.choresRankView2 = function (direction, choreRankings) {
       options: mappedChoreRankings,
     },
   ));
+  blocks.push(common.blockInput(
+    'Preference strength',
+    {
+      action_id: 'strength',
+      type: 'static_select',
+      placeholder: common.blockPlaintext('Choose a preference strength'),
+      initial_option: preferenceOptions[0],
+      options: preferenceOptions,
+    },
+  ));
 
   return {
     type: 'modal',