[WIP] Add scenario timeline #165
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## Initial User Prompt
> "Look at the most recent commit for context. I just added a slider widget with a thumb that should be draggable. Make a plan for hooking mouse events up to this slider so that it's possible to drag it left and right with the circle staying inside the bounds of the slider rectangle."
## Refinement Requests
1. **Code organization**: "How will you isolate the code for this so it's cleanly in its own named function?"
2. **Lazy initialization**: "I think the new init function should only be called when the slider is revealed by activating #yearpicker-future, how does that change your plan?"
3. **Constraints and improvements**: "Let's limit the x/y distance the slider can go so the thumb circle stays visible inside the slider with a 1px boundary. Let's scale the positive and negative display to max out at R+12 / D+12 at either end. Let's also use a matrix transform on the <g id="yearpicker-predict-thumb"> element when we move it so the group moves as a whole unit with just one place to change x and y values."
4. **Dynamic configuration**: "When setting up PREDICTION_SLIDER, can you use position values read from the #yearpicker-predict-slider instead of provided as numeric constants"
5. **Direction reversal**: "Please reverse the direction so D = positive = left and R = negative = right, then make the default initial position zero"
## Changes Made
### 1. **Added PREDICTION_SLIDER constant** (index.js6:33-43)
- Tracks drag state and dynamically calculated boundaries
- Value range: -12 to +12, default: 0 ("Even")
### 2. **Created window.initPredictionSlider() function** (index.js6:183-265)
- Lazy initialization when "2026 Predictions" is activated
- Reads all dimensions from DOM (slider position, circle radius)
- Calculates bounds with 1px clearance automatically
- Uses matrix transform translate(x, 0) to move entire thumb group
- Handles mousedown/mousemove/mouseup with SVG coordinate transformation
- Reversed mapping: left = D (positive), right = R (negative)
### 3. **Modified selectYear() function** (index.js6:915-918)
- Calls initPredictionSlider() when predict mode is activated
### 4. **Updated HTML** (index.src.html:512)
- Changed default label to "Even"
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
## User Request (Verbatim)
> "Look at the last two commits for a recent slider we added. I want to change the x positions inside <g id="yearpicker-predict-thumb"> so that they are 96px to the left making the center of the circle element cx="0", then compensate for this x-shift by using the translate transformation we are already setting in initPredictionSlider(). The HTML by default should have the translation defined so it doesn't look weird without Javascript, and the visual behavior of the slider and thumb should be completely unchanged after this. Only the math will change so the zero values make a little more sense in the HTML/SVG definition. What is your plan?"
> "Don't use a fixed value of 96, use the value from the group's transform. Update your plan."
## Changes Implemented
**HTML (index.src.html:510-514)**: Added transform="translate(96, 0)" to the <g> element and shifted all child x-coordinates 96px left (circle cx="96" → cx="0", rect x="80" → x="-16", text x="96" → x="0")
**JavaScript (index.js6:205-208)**: Changed originalX from reading $circle.attr('cx') to parsing the group's transform attribute: const transformMatch = $thumb.attr('transform')?.match(/translate\(([^,]+)/); const originalX = transformMatch ? parseFloat(transformMatch[1]) : 0;
**Result**: Circle centered at cx="0" with cleaner zero-based math, visual behavior unchanged.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
## User's Initial Request (Verbatim): > "Look at the last four commits for context on some recent changes we should extend. In those changes we added a new "predict" view state with a slider in it that can be dragged left and right. I want the "predict" text throughout this code to match the slider state: "predict0" for when it's at zero, "predictD12" for a D+12 value, "predictR12" for R+12, and similar integer-only values between those extremes. The new CSV rows will still be prefixed with just plain "predict", the R/D suffix will be for the frontend only. What is your plan?" ## Implementation: Successfully implemented helper functions and logic to track slider position in frontend state while CSV data remains unchanged: **Helper Functions:** - getPredictionYearString(value): Converts -12 to +12 into "predictR12", "predict0", "predictD12", etc. - isPredictionYear(year): Checks if year starts with "predict" - getBaseYear(year): Extracts "predict" for CSV lookups from any variant **Key Changes:** - Updated CSV filtering to use base year for data lookups - Modified all display/comparison logic to use isPredictionYear() helper - Updated URL hash regex to support new prediction year formats (predict0, predictD12, predictR12, etc.) - Modified year picker click handler to convert "predict" to appropriate prediction year string ## Issues Encountered and Fixed: 1. **Parse Error**: Replaced optional chaining ?. with explicit null check for compatibility 2. **Initialization Timing**: Moved CURRENT_VIEW.year = year assignment before initPredictionSlider() call so slider init has access to current year 3. **Unnecessary Data Reloads**: Changed slider drag to only update CURRENT_VIEW.year and hash, not trigger full selectYear() with data reload 4. **Critical Positioning Bug**: Original code calculated translateX = constrainedX - originalX which moved the circle to position 0. Fixed by using absolute position directly: translateX = constrainedX. Since the circle is at cx="0" within the group, the group's translation value IS the absolute position of the circle. ## Final Result: - Slider positions correctly and is fully draggable within bounds - URL hash updates in real-time (e.g., #!predictD5-ushouse) - CSV data still uses plain "predict" prefix - All display logic correctly handles prediction year variants **Files Modified:** index.js6 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
## User's Initial Request (Verbatim): > "Look at the last five commits for context. We want to enhance <rect id="yearpicker-predict-slider"/> so it's possible to click on it and send the <g id="yearpicker-predict-thumb"> to the closest available clicked position. It should still respect the drag boundaries and generally show no other behavior changes than being clickable. A pointer cursor will make it clear that this is possible. What is your plan?" ## Implementation: Enhanced the prediction slider to support click-to-position functionality. **Changes:** 1. **CSS (index.scss:347)**: Added `cursor: pointer` to `#yearpicker-predict-slider` 2. **JavaScript (index.js6:272-285)**: Added click handler that uses the same SVG coordinate transformation as dragging and calls `updateThumb(svgP.x)` to reposition the thumb, automatically respecting all existing constraints and boundaries. 3. **HTML (index.src.html:509)**: Added `rx="5"` to slider rect for rounded corners **Result:** Users can now click anywhere on the slider track to jump the thumb to that position while maintaining all existing drag behavior and constraints. **Files Modified:** index.scss, index.js6, index.src.html 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
Updated prediction URL hashes from predictD12/predictR12 to predict12D/predict12R and visual labels from D+5/R+8 to +5D/+8R to standardize the format with numbers preceding party letters. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
Stage 1: Script Split Complete Successfully split update-ushouse-elections.py into two scripts with distinct responsibilities: New Architecture: 1. update-ushouse-elections.py (API/GDocs) - Args: api_key, credentials_file - Iterates over states in Google Sheets - Checks if plans need updating based on incumbents/deadlines - Uploads new plans to PlanScore and updates Google Sheets column M 2. update-ushouse-data-files.py (CSV generation) - Args: credentials_file, csv_filename - Reads CSV, checks Google Sheets for 2026 rows - If state has 2026 Redraw = Y: fetches URL from GDocs, recalculates EG from PlanScore - Otherwise: preserves row as-is - All other cycles unchanged Key Points: - Google Sheets is source of truth for plan URLs - Column G (2026 Redraw) controls which states get URLs in CSV - All data calculations unchanged from original Verified working: both scripts run in sequence with expected output (only Utah URL updated). User prompts: "We are going to split update-ushouse-elections.py into two files: one that just interacts with the PlanScore API and updates GDocs (the original), and a new one update-ushouse-data-files.py that reads from GDocs and writes to a local CSV file. See update-ushouse-data-files.sh and update-ushouse-elections.sh for calling signatures. We should proceed in two stages: first migrate the CSV writing functionality to the new script without changing anything about the data in GDocs, the interactions with PlanScore, or the contents of the CSV. In the second stage we will modify the CSV ouput. Tell me your stage one plan." "Try running the two shell scripts in sequence to verify that they work" "Let's do this: use column G (Has Redraw) to decide which ones get URLs." "Summarize your work on this stage for me" "Shorten your summary to 2/3 of its length" "Save this summary in a git commit" 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
…tate Swings worksheet Added load_google_state_swings() function that finds the most recent "State Swings YYYY-MM-DD" worksheet and reads Column O "Zero Shift PlanScore URL". Modified main() to process "predict" cycle rows by looking up states in State Swings data and calling planscore2election() to calculate actual efficiency gap scores. Results: 4 predict rows updated (IL, NC, UT, VA) with non-zero EG values and Zero Shift URLs. All other predict rows remain unchanged. User prompts: - "We now need to modify update-ushouse-data-files.py so that it writes the \"predict\" rows just as it writes the \"2026\" rows, including the planscore URLs and efficiency gap score via planscore2election(). After running update-ushouse-data-files.sh we should see the \"predict\" rows of the local CSV updated with new numbers and links in them. Tell me your plan." - "A piece of information I forgot: the \"predict\" rows should come from the most recent \"State Swings YYYY-MM-DD\" worksheet in GDocs, that's what makes them different from the \"2026\" rows. We'll use the plans in the Zero Shift column (O). Revise your plan." - "Shorten this summary by half and write to git" 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
User's request: "I just staged some changes to WEBSITE_OUTPUT/data/bias_ushouse-elections.csv, now we need update-ushouse-data-files.py to reflect those changes. Right now we include just the 'Zero Shift' column from the State Swings sheet, but we will need to also factor in the other columns that go from D+12 through R+12 vote swings, mapping them to the 'predict12D', 'predict12R', and similarly named rows. The zero shift ones will still map to the 'predict' rows. Tell me your plan for making this change and testing it." Changes: - Modified load_google_state_swings() to extract all 25 vote swing columns (D+1 through D+12, Zero Shift, R+1 through R+12) from State Swings worksheet - Added get_state_swings_column_name() helper to map cycle names (predict, predict1D-12D, predict1R-12R) to State Swings column names - Updated main processing logic to handle all predict* cycles using column mapping - Tested successfully: 1,250 total predict rows (25 cycles × 50 states), with 100 rows populated with actual EG values for IL, NC, UT, VA
… support User prompts (verbatim): 1. "Right now update-ushouse-data-files.py and index.js6 both use "predict" as a string constant to reference rows in ~/Sites/PlanScore-FrontPage/ WEBSITE_OUTPUT/data/bias_ushouse-elections.csv. I've modified the CSV and now we need to make some associated changes: the Zero Shift rows will be known as "predict0" instead of "predict", and the front end code should use the full range of values like "predict12D", "predict0", "predict12R" etc. so that the filtering in window.selectYear() can show different vote swing scenarios in the frontend driven from the 25 different scenarios in the CSV. Tell me your plan." 2. "We do not need to handle legacy URLs. It might make sense for window.getBaseYear() to be removed, we can short-circuit the connection since we'll be using strings like "predict0" and "predict12D" throughout with no need to map to a special signal value. Update your plan." 3. "Almost! The frontend slider does not appear to trigger the update behavior that changes the map. I can see that it has the correct effect when reloading the page, it just needs to have its change events connected. Do that." This change allows the prediction slider to display unique efficiency gap data for all 25 vote swing scenarios (D+12 through R+12 plus zero shift). Python changes (update-ushouse-data-files.py): - Updated get_state_swings_column_name() to map "predict0" instead of "predict" to "Zero Shift PlanScore URL" for consistency with numbered format Frontend changes (index.js6): - Removed getBaseYear() helper function - no longer needed since we use full cycle names (predict0, predict5D, predict12R) directly throughout - Updated year-fudging logic: when viewing predictions in US House and switching to other boundary types (State Senate, etc.), automatically defaults to 2026 since other boundaries don't have prediction scenarios - Updated CSV filtering: use CURRENT_VIEW.year directly instead of converting all predict variants to a single base value - this allows each scenario (predict0, predict1D, predict12R) to match its unique CSV row - Connected slider drag events to trigger loadDataForSelectedBoundaryAndYear() so map updates in real-time as user moves slider CSV data (bias_ushouse-elections.csv): - Regenerated with new naming scheme: predict0 (zero shift), predict1D-12D (Democratic vote swings), predict1R-12R (Republican vote swings) - All 25 scenarios × 50 states = 1,250 prediction rows - States with scenario data (IL, NC, UT, VA) now show varying EG values across all 25 cycles The prediction slider now dynamically loads and displays different electoral outcomes as users explore vote swing scenarios.
…cutor Refactored main() to use concurrent.futures.ThreadPoolExecutor for processing CSV rows in parallel. Extracted row processing logic into process_row() function that returns (index, Election) tuples. Results are sorted by index to preserve output ordering. User prompt: "update-ushouse-data-files.py is slow because rows are iterated in main(). Propose your plan for using 10x parallelism in this, while retaining consistent ordering in the output. Test by running update-ushouse-data-files.sh and expect no changes to the CSV file." 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
User prompt: "The plan https://planscore.org/plan.html?20260118T033401.290781868Z should be present in ~/Sites/PlanScore-FrontPage/WEBSITE_OUTPUT/data/bias_ushouse-elections.csv after running ~/Sites/PlanScore-FrontPage/update-ushouse-data-files.sh but it is not. I think our script is confused about the planscore URLs in the local CSV vs. the ones in GDocs. The GDocs ones should override the local ones when a plan URL is called-for, figure out why that's not happening and verify that my Illinois plan URL above is included." Changed get_state_swings_column_name() to return "No-Swing PlanScore URL" instead of "Zero Shift PlanScore URL" to match the actual column name in Google Sheets. This allows predict0 cycle rows to correctly fetch and process plan URLs from the State Swings worksheet. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
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